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List of Tables. 6
1. Introduction. 7
1.1. Document Scope. 7
1.2. Document Audience. 7
1.3. New Features/Enhancements. 7
2. Abbreviations and Definitions. 8
3. Related Documentation. 9
4. Compatibility. 10
5. Software Release Description. 11
5.1. Release Identification. 11
5.2. Software Tools Versions. 11
6. Software Changes Description. 12
6.1. Validated Corrections/Improvements. 12
6.2. Interface Changes. 13
7. Troubleshooting.. 14
8. Restrictions and Additional Information. 15
List of Tables
Table 1. Abbreviations and Definitions. 8
Table 2. Related Documentation. 9
Table 3. Hardware Compatibility. 10
Table 4. Software Compatibility. 10
Table 5. Internet Library Release Information. 11
The scope of this document is the Internet Library 5.57.0 release description for the AirPrime modules listed in the compatibility section.
This release note may be distributed to all direct and indirect customers and will be posted in Sierra Wireless Source
No new features have been introduced in this release
Table 1. Abbreviations and Definitions
Data link escape character
Dynamic Host Configuration Protocol
End Of Text character
File Transfer Protocol
General Purpose Input/Output
General Packet Radio Service
Global System for Mobile communications
Hypertext Transfer Protocol
Hypertext Transfer Protocol Secure
Subscriber Identity Module
Simple Network Management Protocol
Secure Sockets Layer
Transmission Control Protocol
User Datagram Protocol
Table 2. Related Documentation
Connectivity Development Guide Internet Library 5.57 (Rev 5.0)
Internet AT Command User Guide Internet Application 5.57 (Rev 5.0)
AT Commands Interface Guide for Firmware 7.53 (Rev 13.0)
ADL User Guide for Open AT Application Framework OS 6.53 (Rev 13.0)
7.53.0 Firmware Customer Release Note
Table 3. Hardware Compatibility
AirPrime Compatibility List
Table 4. Software Compatibility
Open AT OS
Open AT Application Framework
Table 5. Internet Library Release Information
Date of generation
S/W Tools Name
Compilation Tool Chain
ARM_EABI_GCC and RVDS
This section presents all corrections or improvements integrated in WIP 5.57.0.
Unsolicited “+WIPBR” indication is not received when starting UART1 bearer as server
response_time reported by AT+WIPPING command is always 0 on AirPrime Q2698
Delay introduced by wip_delay() is inaccurate/inconsistent
Ethernet plugin does not functional with AirLink FX100
HTTP-Sample is leaking memory
"+CME ERROR: 841" is received in place of "+CME ERROR: 842", if an invalid FTP server name is given while establishing FTP session.
The +CME ERROR: 837 received instead of +CME ERROR: 831 when the command AT+WIPDATA is issued without creating any bearer or socket.
Internet bearer opens successfully even if the Internet stack is stopped using AT+WIPCFG=0.
Connecting and disconnecting a socket in a loop, using Internet Application, leads to a reset.
Functions of Security library not called if an application links to both Internet and Security library.
Using Internet Library, If GPIO subscription and power on is done during the I2C bus subscription or read operation, then I2C bus status is sometimes returned as busy. This ‘busy’ status leads to an error while reading of MAC Address.
WIP_CEV_PEER_CLOSE EVENT is not received with the HTTPS in case Server Shutdowns after data channel has been opened.
Using Internet Library, When a GET Request is sent from SNMP manager to SNMP agent before getting the response of the previously sent GET request, then AirPrime freezes.
When SNMP session is closed using the API wip_snmpClose(), the AirPrime resets.
WIP_CEV_PEER_CLOSE event is not correctly managed by Internet Library when HTTP client is used on a non-persistent HTTP server. In this case, HTTP server closes the socket after each request, but Internet Library doesn’t close it on its side. So, if a second HTTP request is sent to the same server, it fails since the connection is closed on the server side.
For Open AT Developers, please refer to the Troubleshooting Guide available in the Source before contacting customer support.
For AT developers, please contact customer service for support and debugging information.
If data is not read before closing the TCP socket and the same socket index in re-opened on another server connection, then the buffered data from already closed connection is shown on TCP server.
When more than 2 stack options are configured at the same time after issuing "AT+WIPCFG=4,1" command, only the last option set can be retrieved properly while the earlier set options are set back to original values.
Response is received in wrong order when data is downloaded from a server through HTTP using +WIPFILE command
WIP_BEV_IP_DISCONNECTED event is not received when network initiated PDP context deactivation takes place for GPRS bearer
AirPrime resets if Internet library APIs are used without calling wip_netInitOpts() or wip_netInit() API.
Incorrect error code [CME ERROR: 831 (bad state) followed by CME ERROR: 842] is received when invalid peer IP address is specified while trying to create a TCP socket.
When file containing only DLE ETX character sequence is sent from TCP client to the server then data loss occurs and "SHUTDOWN" indication is received.
When using wip_list API, WIP_CEV_PEER_CLOSE event is not received after the last data is received.
It is not possible to start the Ethernet bearer with DHCP enabled. Also with DHCP disabled, the Ethernet bearer does not get unsubscribed on removing the Ethernet cable.
While trying to execute Internet Application commands using function adl_atCmdSendExt() from a command handler of customized command, subscribed in an application, then sometimes response to Internet Application commands is not received.