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WHAT'S NEW
New FreeRTOS Long Term Support version now available.
Receive security patches and critical bug fixes on FreeRTOS libraries for two years. See the blog post.
FreeRTOS Extended Maintenance Program (EMP) registration now open.
Providing security patches and critical bug fixes on FreeRTOS Long Term Support (LTS) versions for up to 10 additional years. See the blog post.
FreeRTOS-Plus-TCP v3.0.0 released:
We've added comprehensive unit tests and penetration and protocol testing. See the blog post.
Featured FreeRTOS IoT Integrations:
Introducing three featured integrations for more secure IoT applications. See the blog post.
Delta Over-the-Air Updates:
Announcing Delta OTA updates. See the blog post.

Porting the Cellular Interface Library to another Modem

FreeRTOS now supports the AT commands of a TCP offloaded Cellular abstraction Layer. In order to add support for a new cellular modem, a developer can use the common component that has already implemented the 3GPP standard AT commands.

In order to port the common component:

  1. Implement the cellular modem porting interface defined in cellular_common_portable.h (Documentation).
  2. Implement the subset of the Cellular Interface library API's that use vendor-specific (non-3GPP) AT commands. The APIs to be implemented are the ones not marked with an "o" in this table.
  3. Implement the Cellular Interface library callback functions that handle vendor-specific (non-3GPP) Unsolicited Result Codes (URC). The URC handlers to be implemented are the ones not marked with an "o" in this table.

The Cellular common APIs document provides detailed information required for each step. We recommend that you start by cloning the implementation of one of the existing modems, then make modifications where your modem's vendor-specific (non-3GPP) AT commands are different.

Current Example Implementations:

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