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List of Tables.
1.1. Document Scope.
1.2. Document Audience.
1.3. New Features/Enhancements.
2. Abbreviations and Definitions.
3. Related Documentation.
5. Software Release Description.
5.1. Release Identification.
5.2. Software Tools Versions.
6. Software Changes Description.
6.1. Validated Corrections/Improvements.
6.2. Interface Changes.
8. Restrictions and Additional Information.
List of Tables
Table 1. New Features/Enhancements.
Table 2. Abbreviations and Definitions.
Table 3. Related Documentation.
Table 4. Hardware Compatibility.
Table 5. Software Compatibility.
Table 6. Open AT OS Release Information.
Table 7. Software Tools Versions.
Table 8. Validated Corrections/Improvements.
Table 9. Interface Changes.
Table 10. Restrictions and Additional Information.
The scope of this document is the OS 6.52 release description for the AirPrimes listed in the compatibility section.
This release note may be distributed to all direct and indirect customers and will be posted in Sierra Wireless Developer Zone.
Table 1. New Features/Enhancements
Get CPU clock API
A new ADL API is available, adl_vsGetClockMode, to get the current CPU frequency.
Heap status API
A new ADL API is available, adl_memStat to retrieve current Heap memory consumption of the Open AT application.
File System full support
File System can be used to manage firmware and application upgrade through DOTA 1 & 2. A&D API set area remains available for compatibility purpose, but not recommended for new design.
Ability to securely connect to an AirPrime module to manage a trace session in order to remotely analyze the traces.
OpenSSL Certificates & Keys in File System
Ability to store Certificates and SSL keys in hidden file system folder. This feature is available in Beta stage
Table 2. Abbreviations and Definitions
Application Development Layer
Application Programming Interface
Access Point Name
GSM Circuit Switched Data Call
General Packet Radio Service
Global System for Mobile communications
Packet Data Protocol
Public Lands Mobile Network
Subscriber Identity Module
Table 3. Related Documentation
AT Commands Interface Guide for Firmware 7.52 (Rev 6.0)
ADL User Guide for Open AT Application Framework OS 6.52 (Rev 6.0)
Product Technical Specification & Customer Design Guidelines - AirPrime Q2686 Refreshed (Rev 10.0)
Product Technical Specification & Customer Design Guidelines - AirPrime Q2687 Refreshed (Rev 12.0)
Product Technical Specification & Customer Design Guidelines - AirPrime SL6087 (Rev 10.0)
Product Technical Specification & Customer Design Guidelines - AirPrime SL808x, SL808xT, SL808xBT (Rev 8.3)
Customer Release Notes – Firmware 7.52
Table 4. Hardware Compatibility
AirPrime Compatibility List
AirPrime SL8080T, SL8082T, SL8082BT, SL8084T
AirPrime Q2686 Refreshed / AirPrime Q2687 Refreshed
AirLink Fastrack Xtend EDGE (FXT009)
Table 5. Software Compatibility
Open AT Firmware
220.127.116.11306260837 or 18.104.22.168404040850
Open AT Application Framework
Table 6. Open AT OS Release Information
22.214.171.124306271400 or 126.96.36.199402271535
Date of generation of library
Note: RVDS_ADL.lib is identical in both OS 188.8.131.52306271400 & OS 184.108.40.206402271535. The differences are limited to update in samples and documentation.
Table 7. Software Tools Versions
S/W Tools Name
Compilation Tool Chain
ARM_EABI_GCC and RVDS
This section presents all corrections or improvements integrated in OS 6.52.
Issues are sorted by alphabetical order of Impacted Domain.
Table 8. Validated Corrections/Improvements
When AT+WRIM command is executed to set bit 16 of <events_bit_field>, the Ring Indicator pulse is sent for all the unsolicited responses instead of the unsolicited response initiated by an application.
Spurious ADL_CALL_EVENT_NO_CARRIER events received on initiating a call, when AT+WBHV=2,1 has been executed and the call handler subscribed for call service has returned value equal to “ADL_CALL_NO_FORWARD_ATA”.
When an application subscribes to call service and initiates a voice call, then two ADL_CALL_EVENT_NO_CARRIER events are received on disconnecting the call from remote/receiver side.
If a command with type ADL_CMD_TYPE_PARA is subscribed by using the adl_atCmdSubscribe() API, the handler provided is also called while issuing the test command i.e. "AT+<xxxx>=?". Command handler should be called after confirming that '?' is not given after '='.
AirPrime may reset if parameter "rsphdl" for function adl_atCmdCreate() is set to NULL and the list of subscribed responses is not equal to NULL.
When the Network forces ME to change GPRS mobile class to CC, ADL_GPRS_EVENT_NW_CLASS_CC event is not received.
Incorrect CID value (5) is returned by the GPRS event handler, on trying to activate PDP context on correct CID value (1-4), when an application which subscribes to GPRS service is downloaded onto the module.
AT+WIND=0 does not disable +WIND: 9 indications if an application is running on the AirPrime.
When a GSM Data call is established using an application which has subscribed to Call Service, then on terminating the data call from remote, "ADL_CALL_EVENT_NO_CARRIER" event is received twice.
When an application is running and a concatenated command including “+CPIN2?” is issued, response is not received for commands following “+CPIN2?” in concatenated command string. In addition to this, the command class remains locked. As a result of this +CME ERROR: 515 is received for further AT commands.
AirPrime is not able to go to sleep mode after some time if AirPrime switches between sleep mode and active mode continuously when a location application is running on the AirPrime.
Subscription to Slave flow at a specific UART using ADL FCM service fails, if FCM flow is already subscribed in Master mode on the same UART.
AirPrime does not resume the data transfer when a single credit is released using adl_fcmReleaseCredits() API after consuming all the available credits.
Function adl_simEnterPIN() accepts the PIN code for the third time even if wrong PIN has already been entered twice. Ideally, ADL_RET_ERR_BAD_STATE should be received in this case.
Table 9. Interface Changes
A new structure to store the GPRS Mobile Allocation Information.
A new field, GprsMobileAllocation of type wm_l3info_Gprs_Mobile_Allocation_t, is added to this structure. This field stored the GPRS Mobile Allocation information (Arfcn list) of the serving cell.
New API to indicate the CPU clock speed (between 26Mhz and 104Mhz) of boost mode.
New API that gives, at run time, the dynamic status of the heap memory (RAM) reserved for Application.
New File system API to lock the access to the given directory (and everything it contains).
New File system API to unlock the access to the given directory (and everything it contains).
New File system API to change the password of a given path.
New API for Remote Debugging Services.
New API to subscribe to the fixed gain audio service and specify the gain to use.
The adl_InitApplicationInterruptPrio ADL table is no more supported by the OS.
Please refer to the Troubleshooting Guide available in Developer Zone before contacting customer support.
This section presents additional information or restrictions that must be taken into account regarding OS 6.52. Issues are sorted by alphabetical order of Impacted Domain
Table 10. Restrictions and Additional Information
Random value of "Context" is received incase API adl_atCmdSendText() is used after API adl_atCmdSendExt().
When FCM service is running with call and/or SIM services, commands ATA, ATD, ATH, AT+CGANS, AT+CGACT, AT+CGDATA, ATO and AT+CPIN cannot be filtered using the API adl_atCmdSubscribe().
On issuing a pre subscribed command from an application, through the 'adl_atCmdSendExt()' API, an OK and ERROR is received alternatively, i.e. the command is sent to the command handler and the firmware alternatively. Ideally, the command should always be sent to the command handler and OK should be received.
Error is not returned in case an attempt is made to play or listen an audio stream which is not supported by AirPrime.
Error is returned and command handler is not invoked for any custom command when command is sent using the API adl_atCmdSendExt().
Subscription to commands beginning with "ATA", "ATD" or "ATH" using the API adl_atCmdSubscribe () fails in case Call service is subscribed prior to subscribing to the commands from the application.
When Using %I64 format specifier for displaying u64/s64 variable through API adl_atSendresponse() in TARGET mode it always prints only "%I64d" instead of the value of the variable. Workaround: use %lld instead of %I64.
Sometimes handler associated with adl_errSubscribe() function is not invoked on reception of error from OS.
The Open AT Application Framework is a complete software package for embedded M2M application development. It offers a range of readily available building blocks which accelerate the application development process, allowing you to bring connected products to market faster and reduce development costs.