dm00055990

UM1547
User manual
Using the firmware of the AT command set
Introduction
This document is a guide to the AT command set, a firmware application embedded in ST
Bluetooth® module series: SPBT2632C2A, SPBT2632C1A, and in ST evaluation tools
STEVAL-SPBT3ATV3, STEVAL-SPBT4ATV3.
The AT command set is a user-friendly interface that implements cable replacement and
supports communication with smartphones and Apple devices.
The SPBT2632C2A.AT2 and SPBT2632C1A.AT2 modules are equipped with the AT2 FW
release, which offers SPP and IAP (iPOD accessory protocol) service, supporting
communication with smartphones and Apple iOS Bluetooth®-enabled devices.
This document provides a detailed description of each command supported by the AT2 FW
interface. Appendix A contains the list of the system configuration variables of the AT
command with each default value and range.
Each of the subsections in Section 3: AT command list gives the definition, syntax and
responses of each command.
Error responses are also detailed in Section 4 of this document.
This document applies also to the previous modules BT 2.1 version.
June 2016
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Contents
1
Definition and acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1
3
AT command FW interface overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
AT command list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
3.2
3.3
3.4
AutoReconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
AutoReconnectSetup (Beta version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Bond . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
BtcVersion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.4.1
3.5
3.6
3.7
3.8
3.9
Build . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.5.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.5.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.6.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.6.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ChangeBaud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.7.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.7.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ChangeDefaultBaud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.8.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.8.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Config . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.9.1
3.10
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cptest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.10.1
2/51
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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3.10.2
3.11
3.12
3.13
3.14
3.15
3.16
3.17
3.18
3.19
3.20
3.21
3.22
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
DefaultLocalName . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.11.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.11.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
DeleteAutoReconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.12.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.12.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
DeleteSmartCable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.13.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.13.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
DisableBond . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.14.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.14.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.15.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.15.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
EnableBond . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.16.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.16.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
EraseBondTable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.17.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.17.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ExitSniff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.18.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.18.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
GetBDAddress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.19.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.19.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
GPIOConfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.20.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.20.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
GPIORead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.21.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.21.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
GPIOWrite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.22.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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3.22.2
3.23
3.24
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
HostEvent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.23.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.23.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
IAPConnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.24.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.24.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
IAPDisconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.25.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.25.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
LinkDisconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.26.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.26.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
LocalName . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.27.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.27.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PassKeyAccept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.28.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.28.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PortDisconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.29.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.29.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
ReadClock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.30.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.30.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.30.3
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.30.4
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.31.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.31.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
RoleSwitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.32.1
3.33
3.34
4/51
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ShowConnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.33.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.33.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ShowDev . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
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3.36
3.37
3.38
3.39
3.40
3.41
3.42
4
3.34.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.34.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SmartCableSetup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.35.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.35.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Sniff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.36.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.36.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SPPConnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.37.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.37.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SPPDisconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.38.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.38.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
StreamingSerial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.39.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.39.2
Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.39.3
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
UpdateInquiryScan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.40.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.40.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
UpdatePageScan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.41.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.41.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.42.1
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.42.2
Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Error responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1
ErrConnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2
ErrExecute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3
ErrFormat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.4
ErrInvalidParam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.5
ErrNumParam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.6
ErrUnknownCmd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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4.7
5
Other responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.1
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2
Escape sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3
Remote escape sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Appendix A
6
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ErrInProgress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
FW configuration variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A.1
AT FW version 1.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A.2
AT2 FW version 1.3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
A.3
AT2 FW version 1.6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
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List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Definitions and acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
AT command list summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Example commands that generate <ErrConnect> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Example commands that generate ErrExecute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Example commands that generate <ErrFormat> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Example commands that generate <ErrInvalidParam> . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Example commands that generate <ErrNumParam> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Example commands that generate <ErrInProgress> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
AT version 1.2 system configuration settings – version 1.2 . . . . . . . . . . . . . . . . . . . . . . . . 33
AT2 version 1.3 - system configuration settings – version 1.4 . . . . . . . . . . . . . . . . . . . . . . 35
AT2 FW version 1.3 system configuration settings - version 1.5 . . . . . . . . . . . . . . . . . . . . 37
AT2 FW version 1.6 system configuration settings - version 1.5 . . . . . . . . . . . . . . . . . . . . 40
AT2 FW version 1.6 system configuration settings - version 1.5A . . . . . . . . . . . . . . . . . . . 44
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
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Definition and acronyms
1
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Definition and acronyms
The following table lists the acronyms used in this document.
Table 1. Definitions and acronyms
Term
Description/meaning
ASCII
American standard code for information interchange, a standard describing encoding of
characters; the use in this document is strictly US 7-bit
BD
DCD
Modem signal “data carrier detect”; indication from a modem that a connection has
been made through, for example, a dial-up connection
DTE
Data terminal entity, e.g., a computer
DTR
Modem signal “data terminal ready”; indication to a modem that the data terminal is
ready for a connection
DUN
Dial-up networking (profile)
GPIO
General purpose input-output
IAP
iPOD accessory protocol
LAN
Local area network
PIN
Personal identification number
SPP
Serial port profile
UART
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Bluetooth device
Universal asynchronous receiver-transmitter
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2
Overview
Overview
This chapter gives a basic overview of the AT and AT2 libraries which include a set of
commands described in detail in Section 3. Appendix A describes the two sets of
configuration variables, relevant to AT and AT2 FW versions. The AT and AT2 FW are third
party IPs developed by Amp'ed RF.
2.1
AT command FW interface overview
The AT command FW is a cable replacement application that provides communication
between Bluetooth-enabled devices. A serial port is used to communicate with a host device
through an AT command interface as shown below.
Figure 1. Communication between hosts
+RVW¬
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The AT command FW provides the following basic features:

AT2 FW supports point-to-point and multipoint connections, while AT FW supports only
point-to-point connections.

Serial port profile, SPP, is supported for both client and server applications.

iPOD accessory protocol, IAP, is supported only by AT2 FW, enabling communication
with Apple iOS Bluetooth-enabled devices.

Command and bypass modes: it is possible to switch between command and bypass
(data transmit/receive) modes during an active connection.

Security: bonding and data encryption provides a secure link between two devices.

Power conservation: use of the Sniff feature to minimize power consumption is
supported only with AT2 FW.

Variable baud rates: the serial port can be configured for the following baud rates:
1200, 2400, 4800, 9600, 19.2k, 38.4k, 57.6k, 115.2k (default), 230.4k, 460.8k, 921.6k,
2M (as general rule, the UART baud rate must be lower than the HCI baud set in the
variable 26)
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3
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AT command list
This chapter details each of the AT commands including brief descriptions of behavior,
syntax of the command, context of the command, and types of responses.
This AT command FW reference guide covers the commands listed in Table 2.
The table compares the AT FW release to the new AT2 FW, pointing out additional features.
Table key:

S: command is supported in this release

NS: command is not supported in this release

New: command is introduced with this release
Table 2. AT command list summary
Command
AT FW version AT2 FW version AT2 FW version AT2 FW version AT2 FW version
V1.2 system
V1.3 system
V1.3 system
V1.6 system
V1.6 system
configuration
configuration
configuration
configuration
configuration
1.2
1.3
1.5
1.5
1.5A
AutoReconnect
NS
NS
NS
New
S
AutoReconnectSetup
NS
NS
NS
New
S
Bond
S
S
S
S
S
BtcVersion
S
S
S
S
S
Build
S
S
S
S
S
Bypass
S
S
S
S
S
ChangeBaud
S
S
S
S
S
ChangeDefaultBaud
S
S
S
S
S
Config
NS
New
S
S
S
Cptest
S
S
S
S
S
NS
NS
NS
New
S
DeleteAutoReconnect
S
S
S
S
S
DeleteSmartCable
S
S
S
S
S
DisableBond
S
S
S
S
S
Discovery
S
S
S
S
S
EnableBond
S
S
S
S
S
EraseBondTable
S
S
S
S
S
ExitSniff
S
S
S
S
S
New
S
S
S
S
GPIOConfig
S
S
S
S
S
GPIORead
S
S
S
S
S
GPIOWrite
S
S
S
S
S
DefaultLocalName
GetBdAddress
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AT command list
Table 2. AT command list summary (continued)
Command
HostEvent
AT FW version AT2 FW version AT2 FW version AT2 FW version AT2 FW version
V1.2 system
V1.3 system
V1.3 system
V1.6 system
V1.6 system
configuration
configuration
configuration
configuration
configuration
1.2
1.3
1.5
1.5
1.5A
S
S
S
S
S
IAPConnect
NS
New
S
S
S
IAPDisconnect
NS
New
S
S
S
LinkDisconnect
S
S
S
S
S
LocalName
S
S
S
S
S
PassKeyAccept
NS
New
New
S
S
PortDisconnect
S
NS
NS
NS
NS
NS
NS
New
S
S
Reset
S
S
S
S
S
RoleSwitch
S
S
S
S
S
NS
NS
NS
New
S
ShowDev
S
S
S
S
S
SmartCableSetup
S
S
S
S
S
NS
S
S
S
S
SPPConnect
S
S
S
S
S
SPPDisconnect
S
S
S
S
S
StreamingSerial
S
S
S
S
S
UpdateInquiryScan
S
S
S
S
S
UpdatePageScan
S
S
S
S
S
Version
S
S
S
S
S
ReadClock
ShowConnection
Sniff
The following subsections describe each of these commands in detail, including a
description of behavior, syntax (including possible parameter values), and types of
responses.
Some responses will not be "immediate". Where applicable, these will be noted and will
include an approximate delay before response.
For commands with optional parameters, all possible forms will be listed under the syntax
subsection.
Error responses are described in Section 4.
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AutoReconnect
The AutoReconnect command is used to automatically reconnect by both SPP and IAP
profiles. The 1st device in the pairing table will be used for the reconnection target. When
the pairing table is deleted, Auto Reconnect will be disabled as well. The reconnect function
may be turned on or off with this command. It will not affect the settings. This setting is NOT
saved in NVM.
3.1.1
Syntax
At+ab AutoReconnect [enable/disable]
Where [Enable/Disable] is an “e” or “E” character to enable this parameter and a “d” or “D”
character to disable it.
3.1.2
Responses
If the change is accepted, the response is:
AT-AB AutoReconnectDone Enabled or AT-AB AutoReconnectDone Disabled
3.2
AutoReconnectSetup (Beta version)
The AutoReconnectSetup command is used to configure the AutoReconnect feature.
3.2.1
Syntax
At+ab AutoReconnectSetup [interval in seconds]
Interval: the time, in seconds, between attempts; 3-100, +/- 5
The target device is the first entry in the pairing table. Reconnections will continue after
every interval, until the feature is disabled or deleted.
This setting is saved in NVM.
3.2.2
Responses
If the operation is successful, the response is:
AT-AB AutoReconnectSetupDone
3.3
Bond
The Bond command is used to initiate bonding with a specified device. A personal
identification number (PIN) is also required with this command. The bond table contains up
to 5 devices. Note: the 6th device will overwrite the oldest one.
3.3.1
Syntax
AT+AB Bond [BD Addr] [PIN]
Where [BD addr] is the BD address of the remote device with which to bond and [PIN] is the
PIN code to use (up to 16 characters).
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3.3.2
AT command list
Responses
If the request is successfully submitted, the response is:
AT-AB BondPending [Remote BD Addr]
If the operation is successful, the response is:
AT-AB BondOk
If the operation fails, the response is:
AT-AB BondFail
3.4
BtcVersion
The BtcVersion command is used to return the current ID of the Bluetooth controller chip.
3.4.1
Syntax
AT+AB BtcVersion
3.5
Build
The Build command is used to return the current build ID of the application firmware.
3.5.1
Syntax
AT+AB Build
3.5.2
Responses
If the operation is successful, the response is:
AT-AB ATn FW Build [date]
where [date] is the date code of the application firmware.
3.6
Bypass
The bypass command is used to return the ATn FW interface to the bypass mode, if a
connection is still available. A possible use for this command is to change a setting after a
connection has been made (such as the UART baud rate). If the ATn FW interface does not
have a connection, it will respond as if the connection is down.
3.6.1
Syntax
AT+AB Bypass
3.6.2
Responses
If a connection is still available, the response is:
AT-AB -BypassMode-
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If there is currently no connection, the response is:
AT-AB ConnectionDown
3.7
ChangeBaud
The host sends the ChangeBaud command in order to change the local UART speed to a
new speed identified by the host. This setting will only remain in effect during the current
session - until reset (as general rule, the UART baud rate must be lower than the HCI baud
rate set in the variable 26).
3.7.1
Syntax
AT+AB ChangeBaud [rate]
where [rate] is the new baud rate:
3.7.2

1200

2400

4800

9600

19,200

38,400

57,600

115,200

230,400

460,800

921,600

2,000,000
Responses
If the change is accepted, the response is:
AT-AB Baudrate Changed
The actual change will not occur until the response has been completely transmitted.
3.8
ChangeDefaultBaud
The host sends the ChangeDefaultBaud command in order to change the default UART
speed to a new speed identified by the host. This command is used to override the default
baud rate from the dynamic configuration script so that the device does not require
reprogramming to update this setting. The new baud rate is updated permanently until the
device is either re-programmed or another ChangeDefaultBaud command is issued. The
baud rate specified in the command will not take effect until the device is reset. To change
the baud rate of the current session, use the ChangeBaud command (as general rule, the
UART baud rate must be lower than the HCI baud rate set in the variable 26).
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3.8.1
AT command list
Syntax
AT+AB ChangeDefaultBaud [rate]
where [rate] is the new baud rate:
3.8.2

1200

2400

4800

9,600

19,200

38,400

57,600

115,200

230,400

460,800

921,600

2,000,000
Responses
If the change is accepted, the response is:
AT-AB Baudrate Changed
3.9
Config
The Config command is used to set a configuration variable.
3.9.1
Syntax
AT+AB Config [variable name] = [variable value]
The list of configuration variables is shown in Appendix A.
3.10
Cptest
The Cptest command allows to verify the connection of the MFI chipset.
3.10.1
Syntax
at+ab cptest
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3.10.2
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Responses
If the coprocessor chipset is correctly connected, the output of the command gives infos
(versions and ID) about the coprocessor. Example:

CP Device Version: 0x03

CP Firmware Version: 0x01

CP Authentication protocol Major version: 0x02

CP Authentication protocol Minor version: 0x00

CP Device ID: 0x00000200
When the coprocessor is not connected or badly connected the output of the command is
CP Data Fail or CP Address Fail.
3.11
DefaultLocalName
The DefaultLocalName command is used to set the name of the device to the name that is
reported during device discoveries. By default, the ATn FW interface uses “Amp'ed UP!”.
Changing the name using this command will permanently change the local name, unlike the
LocalName command, specified hereafter.
3.11.1
Syntax
AT+AB DefaultLocalName [name]
Where [name] is a string for the new local name, case sensitive (up to 20 characters). The
space character is allowed; the name is assumed to be all text up to the end of the
command.
3.11.2
Responses
If the operation is successful, the response is:
AT-AB LocalNameOk
3.12
DeleteAutoReconnect
The DeleteAutoReconnect command is used to delete the reconnect feature
The device in the reconnection memory will be deleted, but the function will remain enabled,
and the settings will stay in effect. This setting is saved in NVM.
3.12.1
Syntax
At+ab DeleteAutoReconnect
3.12.2
Responses
If the operation is successful, the response is:
AT-AB DeleteAutoReconnectDone
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3.13
AT command list
DeleteSmartCable
The DeleteSmartCable command removes the current Smart Cable settings that were
entered using the SmartCableSetup command, but not the setting from the dynamic
configuration. The Smart Cable will then be deactivated for the remainder of this session.
Upon reset, if a dynamic configuration for a Smart Cable exists, it will be activated. If there is
no dynamic configuration Smart Cable setup, then this feature will remain deactivated.
3.13.1
Syntax
AT+AB DeleteSmartCable
3.13.2
Responses
If the operation is successful, the response is:
AT-AB DeleteSmartCableDone
3.14
DisableBond
The DisableBond command is used to deny new bonding with a device.
This command cannot be used while a connection is active.
3.14.1
Syntax
AT+AB DisableBond
3.14.2
Responses
If the operation is successful, the response is:
AT-AB BondDisabled
3.15
Discovery
The discovery command is used to initiate a device discovery. The command will return the
number of responses of nearby devices and then the individual responses with BD address
and name of device. The number of devices returned is limited to 10.
Inquiry is performed with an interval of 10.24 seconds.
The devices are reported in the same order as the original inquiry results.
3.15.1
Syntax
AT+AB Discovery [COD filters]
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The discovery COD optional parameters are listed here below:
3.15.2
–
miscellaneous
–
computer
–
phone
–
lan
–
peripheral
–
imaging
–
wearable
–
toy
–
health
Responses
When the discovery command has been accepted, the response is:
AT-AB InqPending
Once the initial inquiry is complete and discovery has been started, the response is:
AT-AB DiscoveryPending [num]
where [num] is the number of devices found, in decimal (up to 10 will be reported).
For each name request that is successful, the response uses the returned names in the
following format.
AT-AB Device [BD addr] [name]
where [BD addr] is in hexadecimal with the most significant byte first. [name] is a string in
double quotes " ".
For each unsuccessful name request, the corresponding name is replaced by “Unknown”.
The name request may not be successful if unable to make a connection for the request.
AT-AB Device [BD addr] "Unknown"
3.16
EnableBond
The EnableBond command is used to enable bonding with another device. The BD address,
PIN and timeout parameters are optional.
When no BD address is specified, requests from all BD Addresses are allowed.
If a BD address is specified, bonding requests from devices with BD Addresses other than
the one specified will fail and the existing link key will be deleted for that device.
Optionally, a PIN code may be entered with this command. If no PIN code is specified, the
default PIN code will be used.
Also, a timeout value, in seconds, may be entered after the PIN code. Bonding will be
disabled automatically after the requested timeout. If no timeout is specified, bonding is
enabled until reset or until the DisableBond command is used.
If this command is issued multiple times, only the last PIN and BD address are saved. Also,
if this command is issued before the first timeout occurs, the subsequent command will
extend the timeout. The timeout is always set to the specified time beyond the last received
EnableBond.
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3.16.1
AT command list
Syntax
AT+AB EnableBond
AT+AB EnableBond [BD addr]
AT+AB EnableBond [BD addr] [PIN]
AT+AB EnableBond [BD addr] [PIN] [timeout]
Where [BD addr] is the BD address of the remote device with which to bond, [PIN] is the PIN
code to use (up to 16 characters), and [timeout] is the duration of the timeout in seconds
(1 to 1000).
3.16.2
Responses
If the operation is successful, the response is:
AT-AB BondEnabled
If bonding has been initiated by a remote device, the notification is:
AT-AB BondPending [BD addr]
where [BD addr] is the BD address of the remote device that initiated the bonding.
If bonding has occurred, the notification is:
AT-AB BondOk [BD addr]
where [BD addr] is the BD address of the remote device with successful bonding.
If bonding was initiated by a remote device but failed, the notification is:
AT-AB BondFail
When the time limit for bonding has expired, the notification is:
AT-AB BondDisabled
3.17
EraseBondTable
The EraseBondTable command is used to erase all of the bonded device entries. Single
devices cannot be erased with this command
3.17.1
Syntax
AT+AB EraseBondTable
3.17.2
Responses
If the operation is successful, the response is:
AT-AB BondTableErased
3.18
ExitSniff
The ExitSniff command is used by AT2 FW to switch a device from sniff mode to active
mode.
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3.18.1
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Syntax
AT+AB ExitSniff [BD address]
Where [BD address] is the BD address of the device to be switched to active mode.
3.18.2
Responses
If the operation is successful, the response is:
AT-AB ActiveMode
3.19
GetBDAddress
The GetBDAddress command is used to read the local device's Bluetooth device address or
MAC address.
3.19.1
Syntax
AT+AB GetBDAddress
3.19.2
Responses
If the operation is successful, the response is:
AT-AB BD_ADDR = [BD address]
3.20
GPIOConfig
The GPIOConfig command is used to configure a GPIO pin to input or output.
3.20.1
Syntax
AT+AB GPIOConfig [GPIO Pin] [Configuration]
where [GPIO Pin] is the pin number of the desired GPIO to configure. The GPIO numbering
depends on the specific HW used.
[Configuration] is “i” or “I” for input and “o” or “O” for output.
3.20.2
Responses
If the operation is successful, the response is:
AT-AB GPIOConfigDone
3.21
GPIORead
The GPIORead command is used to read a GPIO pin. A GPIO may be read while
configured as either an input or output.
3.21.1
Syntax
AT+AB GPIORead [GPIO Pin]
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where [GPIO Pin] is the pin number of the desired GPIO to read. The GPIO numbering
depends on the specific HW used.
3.21.2
Responses
If the operation is successful, the response is:
AT-AB GPIOReadDone [result]
Where [result] is either a 1 to indicate high, or 0 to indicate low.
3.22
GPIOWrite
The GPIOWrite command is used to set a GPIO pin to high or low. A GPIO may only be set
when configured as an output.
3.22.1
Syntax
AT+AB GPIOWrite [GPIO Pin] [Setting]
where [GPIO Pin] is the pin number of the desired GPIO to read. The GPIO numbering
depends on the specific HW used.
[Setting] is a 1 to set a pin to high and a 0 to set a pin to low.
3.22.2
Responses
If the operation is successful, the response is:
AT-AB GPIOWriteDone
3.23
HostEvent
The HostEvent command is used to enable/disable the host notification strings. This will
override the default setting in the dynamic configuration only for the current session, until
reset.
3.23.1
Syntax
AT+AB HostEvent [Enable/Disable]
Where [Enable/Disable] is an “e” or “E” character to enable this parameter and a “d” or “D”
character to disable it.
3.23.2
Responses
If the feature is successfully enabled, the response is:
AT-AB HostEvent Enabled
If the feature is successfully disabled, there is no response because the events have been
disabled.
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3.24
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IAPConnect
The IAPConnect command is used by AT2 FW to initiate a connection with the specified
Apple iOS device. The remote BD address must be specified.
3.24.1
Syntax
AT+AB IAPConnect [BD Addr]
Where [BD Addr] is the iOS remote device’s BD address to page.
3.24.2
Responses
If the connection is successful, the response is:
AT-AB ConnectionUp [Remote BD Addr]
AT-AB -iAP-BypassMode-
If the connection cannot be completed, the response is:
AT-AB iAPConnectionClosed
3.25
IAPDisconnect
The IAPDisconnect command is used by AT2 FW to terminate a connection with the remote
Apple iOS device.
3.25.1
Syntax
AT+AB IAPDisconnect
3.25.2
Responses
If the connection is successful, the response is
AT-AB iAPConnectionClosed
3.26
LinkDisconnect
The LinkDisconnect command is used to terminate a connection with the remote device's
link handle.
3.26.1
Syntax
AT+AB LinkDisconnect
3.26.2
Responses
If the connection is successful, the response is
AT-AB ConnectionDown
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3.27
AT command list
LocalName
The LocalName command is used to set the name of the device to the name that is reported
during device discoveries. By default, the ATn FW interface uses “Amped UP!”. Changing
the name using this command does not permanently change the local name.
3.27.1
Syntax
AT+AB LocalName [name]
Where [name] is a string for the new local name (up to 20 characters). The space character
is allowed; the name is assumed to be all text up to the end of the command.
3.27.2
Responses
If the operation is successful, the response is:
AT-AB LocalNameOk
3.28
PassKeyAccept
This command is used to accept the MITM confirmation code, automatically generated
during the bonding phase. After setting var55 = true, it is possible to use this command to
complete the paring automatically
3.28.1
Syntax
AT+AB PassKeyAccept [y/n]
Example for confirmation:
AT+AB PassKeyAccept y
Example for denying confirmation:
AT+AB PassKeyAccept n
3.28.2
Responses
If the operation is successful the module enters in bypass mode and it is automaticaly
bonded or connected.
3.29
PortDisconnect
The PortDisconnect command is used to terminate a connection with the remote device port
handle. it is supported by AT FW.
3.29.1
Syntax
AT+AB PortDisconnect
3.29.2
Responses
If the operation is successful, the response is:
AT+AB ConnectionDown
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ReadClock
This command reads the piconet clock of the local or remote device
3.30.1
Syntax
AT+AB ReadClock
3.30.2
Responses
Local clock
Clock [Local BDAddress] [clock output in HEX]
3.30.3
Syntax
AT+AB ReadClock [Remote Address]
3.30.4
Responses
Remote device clock
Clock [Remote BDAddress] [clock output in HEX]
3.31
Reset
The Reset command is used to reset the ATn FW interface. This is provided in the event
that a host application wants to perform a software reset for error recovery. There is a
response prior to reset in order to verify that the command was received by the ATn FW
interface. A reset requires 1.6 seconds.
3.31.1
Syntax
AT+AB Reset
3.31.2
Responses
If the operation is successful, the response is:
AT-AB ResetPending
3.32
RoleSwitch
The RoleSwitch command is used to change a link from/to a Master or Slave role
3.32.1
Syntax
at+ab RoleSwitch [bd address] [role]
where
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
[bd address] is the address of the remote device that will receive the role switch

[role] is the new role of the local device: 0=Master, 1 =Slave
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3.33
AT command list
ShowConnection
This command is used to display the details of active links.
3.33.1
Syntax
at+ab ShowConnection
3.33.2
Responses
Reply format with active connection:
Channel ID, Remote Device BD Address, Status, Profile
0
4cb199dccd22
Connected IAP
Reply without active connection:
No Device Connected
3.34
ShowDev
The ShowDev command is used to list the contents of the Bond Table.
3.34.1
Syntax
AT+AB ShowDev
3.34.2
Responses
This command returns the list of all the devices bonded, identified by their BD address.
3.35
SmartCableSetup
The SmartCableSetup command is used to enable and configure a Smart Cable device. A
device's BD address is specified in order to automatically establish a connection, replacing
the need for AT connection commands. This command will override the dynamic
configuration of a Smart Cable device until the DeleteSmartCable command is issued; it is
saved in non-volatile memory.
3.35.1
Syntax
AT+AB SmartCableSetup [BD address] [Attempts] [Interval]
Where [BD address] is the BD address of the remote device to page and attempt to connect.
[Attempts] 0 - 999 is the number of pages that will be attempted to the specified device until
a connection is successful. A value of 0 will not automatically page the remote device. A
value of 1000 will perform unlimited pages until the connection is switched from command
mode to bypass mode to exchange data.
[Interval] 1-1000 is the number of 100 ms intervals (0.1 sec to 100 sec) between page
attempts. This interval is in addition to the amount of time required by the page attempt
itself.
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3.35.2
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Responses
If the operation is successful, the response is:
AT-AB SmartCableConfigDone
3.36
Sniff
The Sniff command is used by AT2 FW to switch a device from active mode to sniff mode.
3.36.1
Syntax
AT+AB Sniff [BD address] [Sniff Interval]
Where [BD address] is the BD address of the device to be switched to active mode. [Sniff
Interval] is given in slots from 66-10,000.
3.36.2
Responses
If the operation is successful, the response is:
AT-AB SniffMode
3.37
SPPConnect
The SPPConnect command is used to initiate a connection with the specified device. The
remote BD address must be specified. The remote Service is optional. If not specified, the
first registered SPP service will be used by default.
3.37.1
Syntax
AT+AB SPPConnect [BD Addr] [Service]
Where [BD Addr] is the remote device’s BD address to page. [Service] is the specific service
on the remote device (optional).
3.37.2
Responses
If the connection is successful, the response is:
AT-AB ConnectionUp [Remote BD Addr]
AT-AB -BypassMode-
If the connection cannot be completed, the response is:
AT-AB SPPConnectionClosed
3.38
SPPDisconnect
The SPPDisconnect command is used to terminate a connection with the remote device. In
Multipoint or Broadcast mode, the master can disconnect a specific node by its ID (0,1,2....).
3.38.1
Syntax
AT+AB SPPDisconnect
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AT command list
AT+AB SPPDisconnect [Slave ID]
3.38.2
Responses
If the connection is successful, the response is
AT-AB SPPConnectionClosed
3.39
StreamingSerial
3.39.1
Syntax
AT+AB StreamingSerial [Enable/Disable]
Where [Enable/Disable] is an “e” or “E” character to enable this parameter and a “d” or “D”
character to disable it. Streaming Serial will disable the RTS/CTS hardware flow control and
discard non-transmitted data when enabled. RTS/CTS flow control is enabled when
Streaming Serial is disabled.
3.39.2
Query
An alternative syntax may be used to query the current StreamingSerial feature status. This
syntax is not supported by other commands.
AT+AB StreamingSerial
3.39.3
Responses
If the feature is successfully applied or queried, the response is:
AT-AB StreamingSerial [Enabled/Disabled]
3.40
UpdateInquiryScan
The UpdateInquiryScan command is used to modify the Inquiry scan parameters: mode,
duration, and interval.
3.40.1
Syntax
AT+AB UpdateInquiryScan [mode] [duration] [interval]
where [mode] is the discoverable mode:

0: non-discoverable

1: limited discoverability - not supported

2: discoverable
[duration] is the scan length in slots; 18 to 4096. The default duration is 18 slots.
[interval] is the period between scans in slots; 18 to 4096. The default interval is 2048 slots
3.40.2
Responses
If the command is successful, the response is:
AT-AB InquiryScanUpdateDone
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UpdatePageScan
The UpdatePageScan command is used to modify the Page scan parameters: mode,
duration, and interval.
3.41.1
Syntax
AT+AB UpdatePageScan [mode] [duration] [interval]
where [mode] is the connectable mode:

0: non-connectable

1: connectable
[duration] is the scan length in slots; 18 to 4096. The default duration is 18 slots.
[interval] is the period between scans in slots; 18 to 4096. The default interval is 2048 slots
3.41.2
Responses
If the command is successful, the response is:
AT-AB PageScanUpdateDone
3.42
Version
The version command is used to return the current version of the ATn FW interface.
3.42.1
Syntax
AT+AB Version
3.42.2
Responses
If the operation is successful, the response is:
AT-AB ATn FWVer [x.y]
where [x.y] is the current version of the ATn FW interface.
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4
Error responses
Error responses
This chapter details the error responses that occur under specific circumstances.
There are seven error responses that can occur beyond error responses specific to a
particular command (e.g., Discovery). They are:

ErrConnect

ErrExecute

ErrFormat

ErrInvalidParam

ErrNumParam

ErrUnknownCmd

ErrInProgress
The following subsections detail the different error responses. These error responses
replace the original error response
AT-AB ErrorCommand
4.1
ErrConnect
The ErrConnect error response will be sent if ATn FW has a valid connection established
and the command cannot be executed while connected (even in the command mode).
Examples of commands that produce this error response are given in the following table.
Table 3. Example commands that generate <ErrConnect>
Example
4.2
Reason
AT+AB Discovery
Performing a device discovery while a connection already
exists.
AT+AB SPPConnect 00043e000000
Establishing a connection to a device while a connection
exists with another.
ErrExecute
The ErrExecute error response will be sent if the command cannot complete for any reason.
Examples of commands that produce this error response are given in the following table.
Table 4. Example commands that generate ErrExecute
Example
AT+AB Sniff
Reason
Execution of sniff while the device is not connected
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ErrFormat
The ErrFormat error response will be sent if ATn FW receives a command (text terminated
by a carriage return or line feed) that does not match the expected format starting with
"AT+AB".
Examples of commands that produce this error response are given in the following table.
Table 5. Example commands that generate <ErrFormat>
Example
Reason
AT-AB discovery
4.4
A valid command name that does not start with the right prefix.
SPPConnect 00043e000000
A command that does not start with “AT+AB”.
abcdef
A command that does not start with “AT+AB”.
ErrInvalidParam
The ErrInvalidParam error response will be sent if the parameters for the requested
command are not correct. The parameter(s) will be echoed back to the user starting from
the parameter that was rejected.
Examples of commands that produce this error response are given in the following table.
Table 6. Example commands that generate <ErrInvalidParam>
Example
Response
Reason
AT+AB SPPConnect 8136
AT-AB ErrInvalidParam
8136
Numeric parameter not specified with required number
of digits (BD address must always be 12 hex
characters).
AT+AB SPPConnect
00043e008136 GOEP
AT-AB ErrInvalidParam
goep
Unrecognized (or unsupported) symbolic parameter
used.
AT+AB ChangeBaud 1600
AT-AB ErrInvalidParam
1600
Numeric parameter is out of range (specified baud rate
is not supported by command).
AT+AB EnableBond
00043e000000
12345678901234567
AT-AB ErrInvalidParam
12345678901234567
String parameter (PIN) has too many characters.
4.5
ErrNumParam
The ErrNumParam error response will be sent if there are too few parameters for the
requested command. A command sent with too many parameters does not generate an
error; instead, the extra parameters are ignored.
Note:
Some commands will accept a variable number of parameters.
Examples of commands that produce this error response are given in the following table.
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Error responses
Table 7. Example commands that generate <ErrNumParam>
Example
Reason
AT+AB Sniff
4.6
The minimum number of parameters was not specified.
ErrUnknownCmd
The ErrUnknownCmd error response will be sent if the requested command is not
recognized. The unrecognized command will be echoed back to the host. Any parameters
given will be ignored.
AT-AB ErrUnknownCmd [unrecognized command]
An accepted command always starts with the command identifier:
AT+AB
4.7
ErrInProgress
ErrInProgress is sent in response to the Discovery command being issued when the
previous one is still in progress.
AT+AB Discovery [unrecognized command]
Examples of commands that produce this error response are given in the following table:
Table 8. Example commands that generate <ErrInProgress>
Example
Reason
AT+AB Discovery
Trying to issue the Discovery command when the previous one has not
completed.
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Other responses
5
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Other responses
The following subsections describe types of responses that occur under specific
circumstances, not necessarily as a result of a specific command. They are:
5.1

Reset

Escape sequence
Reset
Upon either a hardware reset or software reset (such as the Reset command), ATn FW will
respond as follows after the reset is complete:
AT-AB -CommandModeAT-AB BDAddress [BD addr]
Because the BD address of the local device is reported during this response, the response
is different than a response to the Escape Sequence.
5.2
Escape sequence
If the escape sequence, "^#^$^%", is received and no connection is active, ATn FW will
immediately respond with:
AT-AB -CommandMode-
When the escape sequence is received while a connection is still active and there is no data
for 2 seconds, ATn FW will respond (after those 2 seconds of no data) with the same string.
ATn FW will now be in command mode.
5.3
Remote escape sequence
The remote escape sequence, supported by AT2 FW, allows a remote device to enter in a
mode where it can be controlled and configured by a BT link using a local host and
Bluetooth device.
To enable Remote Control the configuration variable RmtEscapeSequence must be set to
true.
The Remote escape sequence is "@#@$@%" and it must be sent by the local host in a
single complete packet over the BT link with no CR or LF in the sequence.
When received, the remote device will respond locally with:
AT-AB RemoteMode.
Note:
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If sent digit by digit it will not be recognized by the system.
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FW configuration variables
Appendix A
FW configuration variables
The system configuration settings for each firmware version are given in the tables that
follow.
In order to set a configuration variable, enter “at+ab config xxxx = yyyy”, where “xxxx” is the
variable name and “yyyy” is the value to set. A variable name could also be specified as
“varzz”, where zz is the sequence number of the variable.
Note:
All changes require a reset to take effect.
A.1
AT FW version 1.2
Table 9. AT version 1.2 system configuration settings – version 1.2
Variable
Name
Default
Var01
BuildVersion
xxxxxxx
Var03
BD_ADDR
00043e260e73
Var04
DeviceName
Amp'ed Up!
Description
Date code software was built.
Bluetooth device address (Read-only).
Code used for secure connection. Up to 20
characters are allowed (case sensitive).
Var05
StreamingSerial
True
When true, hardware RTS/CTS flow control is
disabled and data not able to be transmitted
over the link will be discarded. When False,
RST/CTS flow control is enabled.
Var06
PIN
1234
Code used for pairing. Up to 16 characters are
allowed (case sensitive).
Var07
UartBaudrate
115200
Main UART baud rate: 1200 to 921,600 baud.
Var08
UartParity
None
Var09
UartDataBits
8
Main UART data bits per character.
Var10
UartStopBits
1
Main UART number of stop bits.
Var11
UartTimeout
44
Timeout used to determine the end of a
message in units of bit times: from 8 to 128 are
allowed.
Var12
AutoSniff
False
Var13
AutoSniffTimeout
5
Var14
AutoSniffInterval
1000
Sniff Slot interval applied AutoSniff.
Var15
HostDeepSleepEnable
False
Enables deep sleep mode.
Var16
GPIO_HostKeepAwake
None
GPIO register used to prevent the module from
entering deep sleep mode. A setting of none
means that this function is disabled.
Var17
GPIO_HostWakeup
None
GPIO register used to wake up the module after
it enters deep sleep mode. A setting of none
means that this function is disabled.
Main UART parity.
This enables the sniff feature when the link is
inactive automatically.
The inactivity timeout in seconds used for
AutoSniff above.
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Table 9. AT version 1.2 system configuration settings – version 1.2 (continued)
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Variable
Name
Default
Description
Var18
UseSmallPackets
False
If true, only DM1, DH1, DM3, DH3 packets are
allowed on a link. EDR is disabled.
Var19
EnableAFH
True
Enable/disable the adaptive frequency hopping
mode.
Var20
EnablePowerControl
False
Enable/disable the Bluetooth dynamic power
control feature.
Var21
HostFlowControl
0
Var22
ATReply
AT-AB
Sets the AT command reply prefix. All events
that are displayed are prefixed by this character
string (case sensitive).
Var23
QoS_Latency
20
Sets the quality of service latency from 3 to 20
Slots. A slot size is 625 microseconds.
Var24
CpuMHz
32
Sets the module’s CPU speed: 2, 4, 8, 12, 16,
20, 24, 28, 32, 36 and 64 MHz are allowed.
(Note: CpuMHz: 40 to 63 are not supported.)
Var25
HciBaudrate
921600
Baud rate of the HCI interface to the Bluetooth
controller: 230,400; 460,800; 921,600; and
2,000,000 baud are allowed.
Var26
SPIEnable
False
Enables the SPI interface to external pins.
Var27
SPIMode
Slave
Mode of the SPI.
Var28
I2CEnable
False
Enables the I2C interface to external pins.
(Note: not supported)
Var29
COD
000000
Var30
LinkSecurity
False
Var31
HostEvents
True
All host events are sent when true.
Var32
BondingAllowed
True
Automatically allows bonding by default when
true.
Var33
PageScan
True
Enables Page scan when true, or halts Page
scan when false.
Var34
InquiryScan
True
Enables Inquiry scan when true, or halts Inquiry
scan when false.
Var35
MPMode
0
Var36
UseExtLPO
False
True when a 32.768 kHz low power oscillator is
present, and false if not present.
Var37
HSE_MHz
13
MHz rating of the main crystal oscillator (readonly)
Var38
EnableEncryption
False
Reserved for future usage.
Bluetooth class of device.
0 = point-to-point, 1 = multipoint using packet
protocol, 2 = broadcast.
Set to true to enable the Bluetooth link
encryption
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FW configuration variables
Table 9. AT version 1.2 system configuration settings – version 1.2 (continued)
Variable
Name
Default
Description
Var39
DefaultSecurity
1
Default security mode should be 1 for no
security or 4 for authentication required. Modes
2 and 3 are used for legacy compatibility.
Var40
DefaultAuthentication
4
Establishes which level of SSP authentication is
enabled. Possible values are 4 - SSP Just works
or 5 - SSP pairing modes with MITM protection.
A.2
AT2 FW version 1.3
Table 10. AT2 version 1.3 - system configuration settings – version 1.4
Variable
Name
Default
Description
Var01
BuildVersion
xxxxxxx IDPS
Date code software was built.
Var03
BD_ADDR
00043e212345
Bluetooth device address (read-only).
Var04
DeviceName
Amp'ed Up!
Code used for secure connection. Up to 20
characters are allowed (case sensitive).
Var05
StreamingSerial
True
When true, hardware RTS/CTS flow control is
disabled and data not able to be transmitted
over the link will be discarded. When false,
RST/CTS flow control is enabled.
Var06
PIN
1234
Code used for pairing. Up to 16 characters are
allowed (case sensitive).
Var07
UartBaudrate
115200
Main UART baud rate: 1200 to 921,600 baud.
Var08
UartParity
None
Var09
UartDataBits
8
Main UART data bits per character.
Var10
UartStopBits
1
Main UART number of stop bits.
Var11
UartTimeout
16
Timeout used to determine the end of a
message in units of bit times: from 8 to 128 are
allowed.
Var12
AutoSniff
False
Var13
AutoSniffTimeout
5
Var14
AutoSniffInterval
1000
Sniff Slot interval applied AutoSniff.
Var15
HostShallowSleepEnab
le
True
Enables shallow sleep mode.
Var16
HostDeepSleepEnable
False
Enables deep sleep mode.
Var17
GPIO_HostKeepAwake
None
GPIO register used to prevent the module from
entering deep sleep mode. A setting of none
means that this function is disabled.
Main UART parity.
This enables the sniff feature when the link is
inactive automatically.
The inactivity timeout in seconds used for
AutoSniff above.
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Table 10. AT2 version 1.3 - system configuration settings – version 1.4 (continued)
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Variable
Name
Default
Description
Var18
GPIO_HostWakeup
None
GPIO register used to wake up the module after
it enters deep sleep mode. A setting of none
means that this function is disabled.
Var19
UseSmallPackets
False
If true, only DM1, DH1, DM3, DH3 packets are
allowed on a link. EDR is disabled.
Var20
EnableAFH
True
Enable/Disable the Adaptive Frequency
Hopping mode.
Var21
EnablePowerControl
True
Enable/Disable the Bluetooth Dynamic power
control feature.
Var22
HostFlowControl
0
Var23
ATReply
AT-AB
Sets the AT command reply prefix. All events
that are displayed are prefixed by this character
string (case sensitive).
Var24
QoS_Latency
20
Sets the Quality of Service Latency from 3 to 20
slots. A slot size is 625 microseconds.
Var25
CpuMHz
32
Sets the module’s CPU speed: 2, 4, 8, 12, 16,
20, 24, 28, 32, 36 and 64 MHz are allowed.
(Note: CpuMHz: 40 to 63 are not supported.)
Var26
HciBaudrate
921600
Baud rate of the HCI interface to the Bluetooth
controller: 230,400; 460,800; 921,600; and
2,000,000 baud are allowed.
Var27
SPIEnable
False
Enables the SPI interface to external pins.
Var28
SPIMode
Slave
Mode of the SPI.
Var29
I2CEnable
False
Enables the I2C interface to external pins.
(Note: not supported)
Var30
COD
240404
Var32
HostEvents
True
All host events are sent when true.
Var33
BondingAllowed
True
Automatically allow bonding by default when
true.
Var34
PageScan
True
Enables page scan when true, or halts page
scan when false.
Var35
InquiryScan
True
Enables inquiry scan when true, or halts inquiry
scan when false.
Var36
MPMode
0
Var37
UseExtLPO
False
Var38
HSE_MHz
13
MHz rating of the main crystal oscillator
(Read-only)
Var39
EnableEncryption
True
Set to true to enable the Bluetooth link
encryption
Reserved for future usage.
Bluetooth Class of Device.
0 = point-to-point, 1 = multipoint using packet
protocol, 2 = broadcast.
True when a 32.768 kHz low power oscillator is
present, and false if not present.
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FW configuration variables
Table 10. AT2 version 1.3 - system configuration settings – version 1.4 (continued)
Variable
Name
Default
Description
Var40
DefaultSecurity
4
Default security mode should be 1 for no
security or 4 for authentication required. Modes
2 and 3 are used for legacy compatibility.
Var41
DefaultAuthentication
5
Establishes which level of SSP authentication is
enabled. Possible values are 4 - SSP Just works
or 5 - SSP pairing modes with MITM protection.
Var42
EnableIAP
True
Enables IAP mode to support iOS devices.
Var43
AllowSniff
False
Enables sniff mode.
Var44
iAPAppID
A1B2C3D4E5
This variable identifies the iOS application ID.
Var45
iAPProtocolStrMain
com.****.Demo
This variable defines the main connecting string
for the iOS application.
Var46
iAPProtocolStrAlt
Var47
CPI2CMode
3
Var48
SPP128UUID
True
This variable enables the 128-bit UUID for the
Android devices.
Var51
RmtEscapeSequence
False
Set to true to enable Remote Control Mode.
com.****.Protocol This variable defines the alternative connecting
Alt
string for the iOS application.
Apple CP chip I2C address mode 2 or 3.
Table 11. AT2 FW version 1.3 system configuration settings - version 1.5
Variable
Name
Default
Description
Var01
BuildVersion
121016A IDPS
Data code software was build (read only)
Var03
BD_ADDR
00043e212345
Bluetooth device address (read-only).
Var04
DeviceName
Amp'ed Up!
Code used for secure connection. Up to 20
characters are allowed (case sensitive).
Var05
StreamingSerial
True
When true, hardware RTS/CTS flow control is
disabled and data not able to be transmitted
over the link will be discarded. When false,
RST/CTS flow control is enabled.
Var06
PIN
1234
Code used for pairing. Up to 16 characters are
allowed (case sensitive).
Var07
UartBaudrate
115200
Main UART baud rate: 1200 to 921,600 baud.
Var08
UartParity
None
Main UART parity. None/Even/Odd
Var09
UartDataBits
8
Main UART data bits per character. With
Even/Odd parity, this must be 9 data bits, to
include 1 bit of parity.
Var10
UartStopBits
1
Main UART number of stop bits. 1 or 2
Var11
UartTimeout
16
Timeout used to determine the end of a
message in units of bit times: from 8 to 128 are
allowed.
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FW configuration variables
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Table 11. AT2 FW version 1.3 system configuration settings - version 1.5 (continued)
Variable
Name
Default
Description
Var12
AutoSniff
False
This enables the sniff feature when the link is
inactive automatically.
Var13
AutoSniffTimeout
5
The inactivity timeout in seconds used for
AutoSniff above.
Var14
AutoSniffInterval
1000
Sniff Slot interval applied AutoSniff: from 200 to
10,000 are allowed. 0.625 ms per slot.
Var15
HostShallowSleepEnable True
Enables shallow sleep mode.
Var16
HostDeepSleepEnable
False
Enables deep sleep mode
None
GPIO register used to prevent the module from
entering deep sleep mode. A setting of none
means that this function is disabled. Typically
GPIO 3 & 5 support this feature.
Var17
GPIO_HostKeepAwake
Var18
GPIO_HostWakeup
None
GPIO register used to wake up the module after
it enters deep sleep mode. A setting of none
means that this function is disabled. Typically
GPIO 3 & 5 support this feature.
Var19
UseSmallPackets
False
If true, only DM1, DH1, DM3, DH3 packets are
allowed on a link. EDR is disabled.
Var20
EnableAFH
True
Enable/Disable the Adaptive Frequency
Hopping mode.
Var21
EnablePowerControl
True
Enable/Disable the Bluetooth Dynamic power
control feature. Not supported
Var22
HostFlowControl
0
Reserved for future usage.
Var23
ATReply
AT-AB
Sets the AT command reply prefix. All events
that are displayed are prefixed by this character
string (case sensitive).
Var24
QoS_Latency
20
Sets the Quality of Service Latency from 3 to 40
slots. A slot period is 625 microseconds
Var25
CpuMHz
32
Sets the module’s CPU speed: 2, 4, 8, 12, 16,
20, 24, 28, 32, 36 and 64 MHz are allowed.
(Note: CpuMHz: 40 to 63 are not supported.)
Var26
HciBaudrate
921600
Baud rate of the HCI interface to the Bluetooth
controller: 115,200; 230,400; 460,800; 921,600;
and 2,000,000 baud are allowed.
Var27
SPIEnable
False
Enables the SPI interface to external pins.
Var28
SPIMode
Slave
Mode of the SPI.
Var29
I2CEnable
False
Enables the I2C interface to external pins.
(Note: not supported)
Var30
COD
240404
Bluetooth Class of Device.
Var32
HostEvents
True
All host events are sent when true.
Var33
BondingAllowed
True
Automatically allow bonding by default when
true
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FW configuration variables
Table 11. AT2 FW version 1.3 system configuration settings - version 1.5 (continued)
Variable
Name
Default
Description
Var34
PageScan
True
Enables page scan when true, or halts page
scan when false.
Var35
InquiryScan
True
Enables inquiry scan when true, or halts inquiry
scan when false.
Var36
MPMode
0
0 = point-to-point, 1 = multipoint using packet
protocol, 2 = broadcast.
Var37
UseExtLPO
False
True when a 32.768 kHz low power oscillator is
present, and false if not present.
Var38
Var39
Var40
not assigned
EnableEncryption
DefaultSecurity
True
Set to true to enable the Bluetooth link
encryption.
4
Default security mode should be 1 for no
security or 4 for Authentication required. Modes
2 and 3 are used for legacy compatibility and not
supported anymore.
Var41
DefaultAuthentication
5
Establishes which level of SSP authentication is
enabled. Possible values are 4 - SSP Just
works or 5 - SSP pairing modes with MITM
protection by asking for a confirmation message
during pairing.
Var42
EnableIAP
True
Enables IAP mode to support iOS devices.
Var43
AllowSniff
False
Enables sniff mode. Must be False when no
32.768KHz LPO is present
Var44
iAPAppID
A123CDFG445
Apple MFI application ID. Up to 10 characters
are allowed. See Apple MFI documentation for
further details
iAPProtocolStrMain
com.****.Demo
Main connecting string for an Apple MFI
Application. Up to 25 characters are allowed.
See Apple MFI documentation for further
details.
Var46
iAPProtocolStrAlt
com.****.Protocol
Alt
Alternative connecting string for the Apple MFI
Application. Up to 25 characters are allowed.
See Apple MFI documentation for further
details.
Var47
CPI2CMode
3
Apple CP Chip I2C address mode 2 or 3. Apple
CP v2.0C should default to 3. See Apple CP
documentation for further details.
Var48
SPP128UUID
True
This variable enables the 128-bit UUID for the
SPP profile.
Var51
RmtEscapeSequence
False
Remote escape sequence enabled: @#@$@%
Var53
CreditMax
5
Number of buffers available for incoming data
packets.
Var54
PageScanInterlaced
False
Enables the Bluetooth interlaced scan mode.
Var45
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Table 11. AT2 FW version 1.3 system configuration settings - version 1.5 (continued)
Variable
Name
Default
Description
Var55
MITMEvent
False
Sends pairing passkey to the main UART. User
must input: at+ab passkeyaccept, in order to
complete pairing.
Var56
AltCPGPIO
False
Alternate Apple CP pins (GPIO 5 = SDA and
GPIO 6 = SCL) are used when true, instead of
RTS/CTS control lines.
Var57
AccName
Amped-Test
Apple accessory name field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var58
AccManufacturer
Amped RF
Apple accessory manufacturer field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var59
AccModelNumber
Test-Model
Apple accessory model number field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var60
AccSerialNumber
Amp’ed Up
Apple accessory serial number field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
A.3
AT2 FW version 1.6
Table 12. AT2 FW version 1.6 system configuration settings - version 1.5
Variable
Name
Default
Description
Var01
BuildVersion
140124C IDPS
Data code software was build (read only)
Var03
BD_ADDR
0080e1fe54g3
Bluetooth device address (read-only).
Var04
DeviceName
Amp’ed Up!
Code used for secure connection. Up to 20
characters are allowed (case sensitive).
40/51
Var05
StreamingSerial
True
When true, hardware RTS/CTS flow control is
disabled and data not able to be transmitted
over the link will be discarded. When false,
RST/CTS flow control is enabled.
Var06
PIN
1234
Code used for pairing. Up to 16 characters are
allowed (case sensitive).
Var07
UartBaudrate
115200
Main UART baud rate: 1200 to 2Mbaud.
Var08
UartParity
None
Main UART parity. None/Even/Odd
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FW configuration variables
Table 12. AT2 FW version 1.6 system configuration settings - version 1.5 (continued)
Variable
Name
Default
Description
Var09
UartDataBits
8
Main UART data bits per character. With
Even/Odd parity, this must be 9 data bits, to
include 1 bit of parity.
Var10
UartStopBits
1
Main UART number of stop bits. 1 or 2
Var11
UartTimeout
16
Timeout used to determine the end of a message
in units of bit times: from 8 to 128 are allowed.
Var12
AutoSniff
False
This enables the sniff feature when the link is
inactive automatically.
Var13
AutoSniffTimeout
5
The inactivity timeout in seconds used for
AutoSniff above.
Var14
AutoSniffInterval
1000
Sniff Slot interval applied AutoSniff: from 200 to
1000 are allowed. 0.625 ms per slot.
Var15
HostShallowSleepEnable
True
Enables shallow sleep mode.
Var16
HostDeepSleepEnable
False
Enables deep sleep mode
None
GPIO register used to prevent the module from
entering deep sleep mode. A setting of none
means that this function is disabled. Typically
GPIO 3 & 5 support this feature.
Var17
GPIO_HostKeepAwake
Var18
GPIO_HostWakeup
None
GPIO register used to wake up the module after it
enters deep sleep mode. A setting of none
means that this function is disabled. Typically
GPIO 3 & 5 support this feature.
Var19
UseSmallPackets
False
If true, only DM1, DH1, DM3, DH3 packets are
allowed on a link. EDR is disabled.
Var20
EnableAFH
True
Enable/Disable the Adaptive Frequency Hopping
mode.
Var21
EnablePowerControl
True
Enable/Disable the Bluetooth Dynamic power
control feature. Not supported
Var22
HostFlowControl
0
Reserved for future usage.
Var23
ATReply
AT-AB
Sets the AT command reply prefix. All events that
are displayed are prefixed by this character string
(case sensitive).
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Table 12. AT2 FW version 1.6 system configuration settings - version 1.5 (continued)
Variable
Name
Default
Description
Var24
QoS_Latency
20
Sets the Quality of Service Latency from 3 to 40
slots. A slot period is 625 microseconds
Var25
CpuMHz
32
Sets the module’s CPU speed: 2, 4, 8, 12, 16, 20,
24, 28, 32, 36 and 64 MHz are allowed. (Note:
CpuMHz: 40 to 63 are not supported.)
Var26
HciBaudrate
921600
Baud rate of the HCI interface to the Bluetooth
controller: 115,200; 230,400; 460,800; 921,600
and 2,000,000 baud are allowed.
Var27
SPIEnable
False
Enables the SPI interface to external pins.
Var28
SPIMode
Slave
Mode of the SPI.
Var29
I2CEnable
False
Enables the I2C interface to external pins. (Note:
not supported)
Var30
COD
240404
Bluetooth Class of Device.
Var32
HostEvents
True
All host events are sent when true.
Var33
BondingAllowed
True
Automatically allow bonding by default when true
Var34
PageScan
True
Enables page scan when true, or halts page scan
when false.
Var35
InquiryScan
True
Enables inquiry scan when true, or halts inquiry
scan when false.
Var36
MPMode
0
0 = point-to-point, 1 = multipoint using packet
protocol, 2 = broadcast.
Var37
UseExtLPO
False
True when a 32.768 kHz low power oscillator is
present, and false if not present.
Var39
EnableEncryption
True
Set to true to enable the Bluetooth link
encryption.
4
Default security mode should be 1 for no security
or 4 for Authentication required. Modes 2 and 3
are used for legacy compatibility and not
supported anymore.
5
Establishes which level of SSP authentication is
enabled. Possible values are 4 - SSP Just works
or 5 - SSP pairing modes with MITM protection by
asking for a confirmation message during pairing.
Var40
Var41
42/51
DefaultSecurity
DefaultAuthentication
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FW configuration variables
Table 12. AT2 FW version 1.6 system configuration settings - version 1.5 (continued)
Variable
Name
Default
Description
Var42
EnableIAP
True
Enables IAP mode to support iOS devices.
Var43
AllowSniff
False
Enables sniff mode. Must be False when no
32.768KHz LPO is present
Var44
iAPAppID
A123CDFG445
Apple MFI application ID. Up to 10 characters are
allowed. See Apple MFI documentation for further
details
Var45
iAPProtocolStrMain
com.****.Demo
Main connecting string for an Apple MFI
Application. Up to 25 characters are allowed. See
Apple MFI documentation for further details.
Var46
iAPProtocolStrAlt
Var47
CPI2CMode
3
Apple CP Chip I2C address mode 2 or 3. Apple
CP v2.0C should default to 3. See Apple CP
documentation for further details.
Var48
SPP128UUID
True
This variable enables the 128-bit UUID for the
SPP profile.
Var51
RmtEscapeSequence
False
Remote escape sequence enabled: @#@$@%
Var53
CreditMax
5
Number of buffers available for incoming data
packets (max value = 8)
Var54
PageScanInterlaced
False
Enables the Bluetooth interlaced scan mode.
Var55
MITMEvent
False
Sends pairing passkey to the main UART. User
must input: at+ab passkeyaccept, in order to
complete pairing.
Var56
AltCPGPIO
False
Alternate Apple CP pins (GPIO 5 = SDA and
GPIO 6 = SCL) are used when true, instead of
RTS/CTS control lines.
Var57
InMtuSize
427
Mtu size for incoming packets for iAP (from 150
to 500 bytes). InMtu and OutMtu must match
each other
Alternative connecting string for the Apple MFI
com.****.Protocol
Application. Up to 25 characters are allowed. See
Alt
Apple MFI documentation for further details.
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Table 12. AT2 FW version 1.6 system configuration settings - version 1.5 (continued)
Variable
Name
Default
Description
Var58
OutMtuSize
427
Mtu size for outgoing packets for iAP (from 150
to 500 bytes).
InMtu and OutMtu must match each other
Var59
AccName
Amped-Test
Apple accessory name field. Up to 20 characters
are allowed. See Apple MFI documentation for
further details.
Var60
AccManufacturer
Amped RF
Apple accessory manufacturer field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var61
AccModelNumber
Test-Model
Apple accessory model number field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var62
AccSerialNumber
Amp’ed Up
Apple accessory serial number field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var63
EnableSPPRcv
False
Enable or disable data receiving from remote
SPP devices, while in CommandMode
Var64
EnableIAPRcv
False
Enable or disable data receiving from remote IAP
devices, while in CommandMode
Table 13. AT2 FW version 1.6 system configuration settings - version 1.5A
Variable
Name
Default
Description
Var01
BuildVersion
141115C IDPS
Data code software was build (read only)
Var03
BD_ADDR
0080e1fe54g3
Bluetooth device address (read-only).
Var04
DeviceName
SPBTmod
Code used for secure connection. Up to 20
characters are allowed (case sensitive).
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FW configuration variables
Table 13. AT2 FW version 1.6 system configuration settings - version 1.5A (continued)
Variable
Name
Default
Description
Var05
StreamingSerial
True
When true, hardware RTS/CTS flow control is
disabled and data not able to be transmitted
over the link will be discarded. When false,
RST/CTS flow control is enabled.
Var06
PIN
1234
Code used for pairing. Up to 16 characters are
allowed (case sensitive).
Var07
UartBaudrate
115200
Main UART baud rate: 1200 to 2Mbaud. (as
general rule, the UART baud rate must be lower
than the HCI baud rate set in the variable 26)
Var08
UartParity
None
Main UART parity. None/Even/Odd
Var09
UartDataBits
8
Main UART data bits per character. With
Even/Odd parity, this must be 9 data bits, to
include 1 bit of parity.
Var10
UartStopBits
1
Main UART number of stop bits. 1 or 2
Var11
UartTimeout
16
Timeout used to determine the end of a message
in units of bit times: from 8 to 128 are allowed.
Var12
AutoSniff
False
This enables the sniff feature when the link is
inactive automatically.
Var13
AutoSniffTimeout
5
The inactivity timeout in seconds used for
AutoSniff above.
Var14
AutoSniffInterval
1000
Sniff Slot interval applied AutoSniff: from 200 to
1000 are allowed. 0.625 ms per slot.
Var15
HostShallowSleepEnable
True
Enables shallow sleep mode.
Var16
HostDeepSleepEnable
False
Enables deep sleep mode
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Table 13. AT2 FW version 1.6 system configuration settings - version 1.5A (continued)
Variable
Var17
Name
GPIO_HostKeepAwake
Default
Description
None
GPIO register used to prevent the module from
entering deep sleep mode. A setting of none
means that this function is disabled. Typically
GPIO 3 supports this feature.
Var18
GPIO_HostWakeup
None
GPIO register used to wake up the module after it
enters deep sleep mode. A setting of none means
that this function is disabled. Typically GPIO 3
supports this feature.
Var19
UseSmallPackets
False
If true, only DM1, DH1, DM3, DH3 packets are
allowed on a link. EDR is disabled.
Var20
EnableAFH
True
Enable/Disable the Adaptive Frequency Hopping
mode.
Var21
EnablePowerControl
True
Enable/Disable the Bluetooth Dynamic power
control feature. Not supported
Var22
HostFlowControl
0
Reserved for future usage.
Var23
ATReply
AT-AB
Sets the AT command reply prefix. All events that
are displayed are prefixed by this character string
(case sensitive).
Var24
QoS_Latency
20
Sets the Quality of Service Latency from 3 to 40
slots. A slot period is 625 microseconds
Var25
CpuMHz
32
Sets the module’s CPU speed: 2, 4, 8, 12, 16, 20,
24, 28, 32, 36 and 64 MHz are allowed. (Note:
CPUMHz: 40 to 63 are not supported.)
Var26
HciBaudrate
921600
Baud rate of the HCI interface to the Bluetooth
controller: 115,200; 230,400; 460,800; 921,600
and 2,000,000 baud are allowed.
Var27
SPIEnable
False
Enables the SPI interface to external pins. (Not
supported)
Var28
SPIMode
Slave
Mode of the SPI. (Not supported)
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FW configuration variables
Table 13. AT2 FW version 1.6 system configuration settings - version 1.5A (continued)
Variable
Name
Default
Description
Var29
I2CEnable
False
Enables the I2C interface to external pins. (Note:
not supported)
Var30
COD
240404
Bluetooth Class of Device.
Var32
HostEvents
True
All host events are sent when true.
Var33
BondingAllowed
True
Automatically allow bonding by default when true
Var34
PageScan
True
Enables page scan when true, or halts page scan
when false.
Var35
InquiryScan
True
Enables inquiry scan when true, or halts inquiry
scan when false.
Var36
MPMode
0
0 = point-to-point, 1 = multipoint using packet
protocol, 2 = broadcast (the EnableIAP- Var42
must be disabled before enabling Broadcast
mode)
Var37
UseExtLPO
False
True when a 32.768 kHz low power oscillator is
present, and false if not present.
Var39
EnableEncryption
True
Set to true to enable the Bluetooth link encryption.
4
Default security mode should be 1 for no security
or 4 for Authentication required. Modes 2 and 3
are used for legacy compatibility and not
supported anymore.
Var40
DefaultSecurity
Var41
DefaultAuthentication
5
Establishes which level of SSP authentication is
enabled. Possible values are 4 - SSP Just works
or 5 - SSP pairing modes with MITM protection by
asking for a confirmation message during pairing.
Var42
EnableIAP
True
Enables IAP mode to support iOS devices.
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Table 13. AT2 FW version 1.6 system configuration settings - version 1.5A (continued)
Variable
Name
Default
Description
Var43
AllowSniff
False
Enables sniff mode. Must be False when no
32.768KHz LPO is present
Var44
iAPAppID
A123CDFG445
Apple MFI application ID. Up to 10 characters are
allowed. See Apple MFI documentation for further
details
Var45
iAPProtocolStrMain
com.****.Demo
Main connecting string for an Apple MFI
Application. Up to 25 characters are allowed. See
Apple MFI documentation for further details.
Var46
iAPProtocolStrAlt
com.****.Protocol Alt
Alternative connecting string for the Apple MFI
Application. Up to 25 characters are allowed. See
Apple MFI documentation for further details.
Var47
CPI2CMode
3
Apple CP Chip I2C address mode 2 or 3. Apple
CP v2.0C should default to 3. See Apple CP
documentation for further details.
Var48
SPP128UUID
True
This variable enables the 128-bit UUID for the
SPP profile.
Var51
RmtEscapeSequence
False
Remote escape sequence enabled: @#@$@%
Var53
CreditMax
5
Number of buffers available for incoming data
packets (max value = 8)
Var54
PageScanInterlaced
False
Enables the Bluetooth interlaced scan mode.
Var55
MITMEvent
False
Sends pairing passkey to the main UART. User
must input: at+ab passkeyaccept, in order to
complete pairing.
Var56
AltCPGPIO
False
Alternate Apple CP pins (GPIO 5 = SDA and
GPIO 6 = SCL) are used when true, instead of
RTS/CTS control lines.
Var57
InMtuSize
427
Mtu size for incoming packets for iAP (from 150
to 500 bytes). InMtu and OutMtu must match
each other
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FW configuration variables
Table 13. AT2 FW version 1.6 system configuration settings - version 1.5A (continued)
Variable
Name
Default
Description
Var58
OutMtuSize
427
Mtu size for outgoing packets for iAP (from 150 to
500 bytes).
InMtu and OutMtu must match each other
Var59
AccName
Amped-Test
Apple accessory name field. Up to 20 characters
are allowed. See Apple MFI documentation for
further details.
Var60
AccManufacturer
Amped RF
Apple accessory manufacturer field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var61
AccModelNumber
Test-Model
Apple accessory model number field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var62
AccSerialNumber
Amp’ed Up
Apple accessory serial number field. Up to 20
characters are allowed. See Apple MFI
documentation for further details.
Var63
EnableSPPRcv
False
Enable or disable data receiving from remote
SPP devices, while in CommandMode
Var64
EnableIAPRcv
False
Enable or disable data receiving from remote IAP
devices, while in CommandMode
Var65
IAPEIRMode
1
Enable the iAP1 or iAP2 (partial) support.
1: iAP1 service
2: iAP2 service
Var66
LoadPTC
1
To reach high data throughput, this variable must
be set to false.
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Revision history
6
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Revision history
Table 14. Document revision history
50/51
Date
Revision
Changes
08-Jun-2012
1
Initial release.
23-Jul-2012
2
–
–
–
–
–
11-Nov-2013
3
Added Table 11
01-Sep-2014
4
–
–
–
–
24-Mar-2015
5
Added Table 13
08-Jun-2016
6
Added note to Var36 description in Table 13.
Modified: Introduction
Added in Table 2: cptest and role switch
Added in Table 9: Var40 and 41
Added: Section 3.4, 3.10.1, 3.10.2, 3.32, 3.32.1
Added in Table 10: Var51
Added Table 12
Modified Section 3.2: AutoReconnectSetup (Beta version)
Minor text corrections throughout the document
Corrected version number error in the footer of each page.
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