This document describes the AT commands used with the nRF9151 Non-Terrestrial Network (NTN) firmware (mfw_nrf9151-ntn) which is the modem subsystem firmware for NTN Narrowband Internet of Things (NB-IoT).
NTN NB-IoT is supported by the nRF9151 LACA A1A System in Package (SiP) version.
The AT command API can also be exposed on one of the nRF9151 serial interfaces by programming appropriate firmware in the application core. The nRF Connect SDK contains examples of such proxy firmware that can be run stand-alone or as part of other firmware functionality in the nRF9151 application core. The stand-alone example is called at_client. This way, an external MCU or computer can get access to the modem API either exclusively or in addition to application firmware running on the nRF9151 itself.