LM740 Multimedia Legacy Firmware Notes

LM-SRX-ATC Firmware Release Notes

LM-SRX-ATC firmware offers AT Command interface to LM740 Multimedia Module. The firmware supports HFP, A2DP, AVRCP, PBAP and SPP profiles. For more details on the AT Command set, please read the Multimedia Firmware AT Command Manual.

LM-SRX-ATCv20130730

Firmware upgrade procedure changed from USB to UART

LM-SRX-ATCv20121119

Added separate command to create PBAP connection
Minor Bug Fixes

LM-SRX-ATCv20121115

Name length issue fixed
Query Pincode issue fixed
LED and general settings minor bugs fixed
Deep Sleep timer issues fixed
Some connection issues fixed

LM-SRX-ATCv20121102

PBAP Profile connection issue fixed
Firmware instability issues fixed
HFP Call waiting notification added
HFP Conference calling feature added
Deep sleep timer issue fixed
HFP Get operator name buffer size increased
A2DP playback commands return ERROR when HFP call is active
HFP/A2DP Query volume commands changed from AT+X or AT-X to AT+V? and AT-V? respectively
When there is no SIM in the phone, Get Operator name returns ERROR
Pairing records issue fixed
SPP Escape sequence issue fixed
A2DP volume issue fixed
PBAP profile issues fixed when phone has no SIM Card

LM-SRX-ATCv20120918

PBAP Pull Phonebook feature implemented
Some firmware instabilities fixed
A2DP Streaming Start/Stop indication added
Some modifications made to LED behaviour
Minor SPP Profile bug fixes
SPP unidirectional data transfer issue fixed

LM-SRX-ATCv20120815

LED changes updated
Firmware supported only on 16MB flash because of increase in firmware image size

LM-SRX-ATCv20120731

Minor SPP Connection issues fixed

LM-SRX-ATCv20120727

List of paired devices emptied on SPP disconnection – Fixed
Issues in connect to paired devices command AT*C fixed
Pairing timer issues fixed
Sending Reset command AT*R1 loses local name – Fixed
Outgoing connection issues corrected

LM-SRX-ATCv20120718

When country code is appended to caller ID, firmware crashes – Fixed
LED state machine bugs fixed
Set name command unable to accept special characters &(£$ etc – Fixed
When HFP connection is disconnected from Phone side and pairing deleted, new connection from firmware fails – Fixed
HFP firmware instabilities and crash fixed
Specified number dialing with country code supported

LM-SRX-ATCv20120712

HFP volume issues resolved. Volume can only be changed when HFP connection is active
Correct format of Specified Number dialling command AT+D
Read BD Address response corrected
Read RSSI Command implemented
Command to just reset the firmware and not restore factory settings implemented
LED indications added

LM-SRX-ATCv20120626

SPP Disconnect indication message corrected
Connection fail indication added
Deep sleep command AT*G format corrected
Query response formats for all commands made uniform
Report packet formats made uniform in all cases
Handsfree commands return rnOKrnERRORrn in unconnected state – Fixed
Sending Escape Sequence +++ in SPP Connected state disconnects SPP connection – Fixed
Indication packet corrected when connection dropped from remote end
Behaviour of AT*P changed to just control discoverability behaviour of the module. Earlier it was used to control the connectable behaviour of the module as well. Firmware is connectable at all times now
AT*R added to reset firmware and restore factory settings
AT*Y command added to get operator name in HFP connected state

LM-SRX-ATCv20120529

ERROR response changed from ERR to ERROR
DFU upgrade command added to upgrade over USB
Incoming and Outgoing call indication included
Response for Escape Sequence added
Uniform format implemented for Report messages

LM-SRX-ATCv20120504

Boot up message changed

LM-SRX-ATCv20120403

Firmware downsized to fit in 8MB flash
Some minor bug fixes

LM-SRX-ATCv20120301

First Version of firmware supporting HFP, A2DP, AVRCP profile