SLM-specific AT commands¶
The application sample uses a series of proprietary AT commands to let the nRF91 development kit operate as a Serial LTE Modem (SLM).
The AT Commands have standardized syntax rules.
Words enclosed in <angle brackets> are references to syntactical elements. Words enclosed in [square brackets] represent optional items that can be left out of the command line at the specified point. The brackets are not used when the words appear in the command line.
<CR>, <LF>, and terminating NUL are allowed in an AT command sent by an application, but are not mandatory when using an interface where both the command string and the length of command string are provided.
A string type parameter input must be enclosed between quotation marks (
There are 3 types of AT commands:
<CMD>[=...]. Set commands set values or perform actions.
<CMD>?. Read commands check the current values of subparameters.
<CMD>=?. Test commands test the existence of the command and provide information about the type of its subparameters. Some test commands can also have other functionality.
AT responds to all commands with a final response.
See the following subpages for documentation of the proprietary AT commands. The modem-specific AT commands are documented in the nRF91 AT Commands Reference Guide.
- Generic AT commands
- Socket AT commands
- Socket #XSOCKET
- Secure Socket #XSSOCKET
- Socket options #XSOCKETOPT
- Secure Socket options #XSOCKETOPT
- Socket binding #XBIND
- Connection #XCONNECT
- Set listen mode #XLISTEN
- Accept connection #XACCEPT
- Send data #XSEND
- Receive data #XRECV
- UDP send data #XSENDTO
- UDP receive data #XRECVFROM
- Resolve hostname #XGETADDRINFO
- TCP and UDP AT commands
- ICMP AT commands
- FOTA AT commands
- SMS AT commands
- FTP AT commands
- GNSS AT commands
- MQTT AT commands
- HTTP client AT commands
- TWI AT commands
- GPIO AT commands