User's Manual

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3 RF module command
RF module can be controlled by AT command, and it is composed in the form of
“AT+<Command>[Enter]”
: [Enter] means newline character, CR(0x0D) + LF(0x0A) character
3.1 Enter command mode
 Check whether to enter “Command Mode” for 5 seconds after powering on the RF module.
(When entering “command mode” command is not input, “RF transmit/receive mode” is
automatically switched)
 RF module setting can be checked and changed after entering “command mode”
 When changing the RF module setting, the changed setting value is applied only after flash
saving is completed. (If Flash cannot be saved, the setting change will not be applied)
 After “command mode” is finished, “RF transmission/reception mode (=RF Mode)” is
automatically switched.
Mode switching Input string Remark
RF Module Initial → CMD Mode AT+SET1[Enter] In “RF transmission
/ reception mode”, can not
enter “command mode”
CMD Mode → RF Mode AT+SET0[Enter]
Table 3. Entering/exiting command mode
3.2 Configuration Command
 Basic command
Command Description
AT+I Display module information
AT+F Module frequency band setting
AT+C Calling up default settings related to module control
AT+S Save module current settings flash memory
AT+V Module current setting output
Table 4. Command table