RFD900x Data Sheet
www.rfdesign.com.au
5
Last update 09/07/2018
3
AT commands
The RFD900x modem can supports an AT modem command set for configuration. The AT command
mode can be entered by using the ‘+++’ sequence in a serial terminal connected to the radio. You
should allow at least one second after the sending of data before entering the sequence to ensure that
the modem will correctly enter command mode.
If successful, an ‘OK’ prompt will be displayed on the screen and the RFD900x modem will stop
displaying incoming data from the remote modem. In command mode, you can use the AT commands
to control the local RFD900x modem.
Note: RT commands are
not
currently supported in the asynchronous firmware.
To set certain registers to a value, follow these steps:
1.
Use the command ATSn=X where
n
is the register number and
X
is the value to assign.
2.
Use the command AT&W to save the new values to the RFD900x modem.
3.
Use the command ATZ to reboot the RFD900x modem for changes to take effect.
Table 3-1 shows a gives a list of AT commands and their description.
AT Command
Description
ATI
Shows the radio version
ATI2
Shows the board type
ATI3
Shows board frequency
ATI4
Shows board version
ATI5
Shows all user settable EEPROM parameters and their values
ATI5?
Shows all user settable EEPROM parameters and their possible range
ATI6
Displays TDM timing report
ATI7
Displays RSSI signal report
ATI8
Display Device 64-bit unique ID
ATI9
Display node ID [multipoint only]
ATO
Exits AT command mode
ATSn?
Displays radio 'S' parameter number ‘n’
ATSn=X
Sets radio 'S' parameter number ‘n’ to ‘X’
ATRn?
Displays radio 'R' parameter number ‘n’
ATRn=X
Sets radio 'R' parameter number ‘n’ to ‘X’
ATZ
Reboots the radio
AT&F
Resets all parameters to factory defaults
AT&W
Writes current parameters to EEPROM
AT&UPDATE
Reset and enter boot mode
AT&P
Change TDM phase (debug only)
