User Manual
HC‐12WIRELESSRFUARTCOMMUNICATIONMODULEV2.4USERMANUAL
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PAGE 7
⑤ AT+Px
Set the transmit power level of the module, the x is 1-8, the module corresponding transmit
power is as follows:
x value 1 2 3 4 5 6 7 8
transmit power (dBm) -1 2 5 8 11 14 17 20
Default setting is 8，the transmit power is the biggest, the communication distance is the
most distant. In general, the transmit power per drop 6~10dB, communication distance will be
reduced by half.
Example：
Send the module command " AT+P5", the module returns " OK+P5".
After exiting the AT command mode, the module transmit power is +11dBm.
⑥ AT+Ry
Acquisition module of the individual parameters. y for B, C, F, P in any of the letters,
respectively: baud rate, communication channel, transmission mode, transmit power.
Example 1:
Send the module command "AT+RB", if the module returns "OK+B9600", then the UART
baud rate is 9600bps.
Example 2:
Send the module command "AT+RC", if the module returns "OK+RC001", then the
communication channel is 001.
Example 3:
Send the module command "AT+RF", if the module returns "OK+FU3", then check the
module to work in the UART transmission mode 3.
Example 4:
Send the module command "AT+RP", if the module returns " OK+RP:+20 dBm ", then the
module's transmit power is +20dBm.
⑦ AT+RX
Get all parameters of the module. In order to return to the UART transmission mode, UART
baud rate, communication channel, transmit power and other information.
Example:
Send the module command "AT+RX", the module returns“OK+FU3 \r\n OK+B9600 \r\n
OK+C001 \r\n OK+RP：+20 dBm \r\n。. ("\r\n" is CRLF)