Serial Modem application

The Serial Modem (SM) application can be used to emulate a stand-alone modem on an nRF91 Series device. This allows you to run your application on a separate host MCU. The application accepts both the modem specific AT commands and proprietary AT commands. The AT commands are documented in the following guides:

Modem specific AT commands
- mfw_nrf91x1 - nRF91x1 AT Commands Reference Guide
- mfw_nrf9151-ntn - nRF91x1 NTN AT Commands Reference Guide
Proprietary AT commands - Serial Modem AT commands

The application supports the following modem firmware:

mfw_nrf91x1 v2.0.4 or later
mfw_nrf9151-ntn

The application supports the following development kits:

Hardware platforms	PCA	Board name	Board target	SW maturity level
nRF9151 DK	PCA10171	nrf9151dk	`nrf9151dk/nrf9151/ns`	Supported
Thingy:91 X	PCA20065	thingy91x	`thingy91x/nrf9151/ns`	Experimental

For more security, the application must use the */ns variant of the board target, which is required when using the nRF91 Series Modem library. When built for this variant, the sample is configured to compile and run as a non-secure application using security by separation. Therefore, it automatically includes Trusted Firmware-M that prepares the required peripherals and secure services to be available for the application.

This application has the following dependencies:

This application uses the following nRF Connect SDK libraries:
It uses the following sdk-nrfxlib libraries:
- Modem library
In addition, it uses the following secure firmware component:
- Trusted Firmware-M

See the subpages for how to use the application, how to extend it, and information on the supported AT commands.