The application runs on the nRF54L15 host MCU and treats the nRF91M1 Serial Modem as a cellular data interface over PPP. Cloud connectivity uses host-native CoAP/DTLS to nRF Cloud. Credentials are stored in TF-M Protected Storage and used to sign JWTs for CoAP authentication.
Cooperating modules run as dedicated threads, each with its own SMF state machine, and communicate through zbus channels. See Architecture for details about the modules and their interactions.