nRF93M1 is controlled by the host through a standards-aligned AT command set, exposed on the primary UART and on a USB CDC-ACM interface.
Standards base
- ITU-T V.250 — generic AT command syntax, serial-line behaviour, baud, flow control.
- 3GPP TS 27.007 — general, network, and mobile-termination commands.
- 3GPP TS 27.005 — SMS AT commands (PDU mode).
- Nordic-specific extensions — prefixed with
%(for example%MODULECFG,%NRFCLOUD*).
Result codes
Final result codes emitted by the module are OK, ERROR, +CME ERROR: <err>, and +CMS ERROR: <err>.
Verbosity is selected by +CMEE: 0 disabled (generic ERROR), 1 numeric, 2 verbose. Vendor-specific +CME ERROR values start at 512.
Runtime command discovery
The list of AT commands available at runtime can be retrieved with AT+CLAC.
Multiplexing
The module supports 3GPP TS 27.010 multiplexing (CMUX) via AT+CMUX, in
both basic (transparency 0) and advanced (transparency 1) variants. Port speeds 600 bps to 3
Mbps are supported. A typical invocation AT+CMUX=0 starts basic CMUX.