User Manual

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The default value is 8, and the higher the transmitting power is, the farther the
communication distance is. When the transmitting power level is set to be 1, the
transmitting power is the minimum. Generally speaking, every time the transmitting
power is reduced by 6dB, the communication distance will be reduced by half.
e.g.:
Send “AT+P5” command to module, and the module returns “OK+P5”. After exiting
from the command code, the transmitting power of module is +11dBm.
⑥
AT+Ry
Obtain single parameter of module, y is any letter among B, C, F and P, respectively
representing: baud rate, communication channel, serial port transparent transmission
mode, and transmitting power.
Example 1:
Send “AT+RB” to module, and if the module returns “OK+B9600”, it is inquired that
the serial port baud rate of module is 9,600bps.
Example 2:
Send “AT+RC” command to module, and if the module returns “OK+RC001”, it is
inquired that the communication channel of module is 001.
Example 3:
Send “AT+RF” command to module, and if the module returns “OK+FU3”, it is
inquired that the module is working in serial port transparent transmission mode 3.
Example 4:
Send “AT+RP” command to module, and if the module returns “OK+RP: +20dBm”,
it is inquired that the transmitting power of module is +20dBm.
⑦
AT+RX
Obtain all parameters of module. Return serial port transparent transmission mode,
serial port baud rate, communication channel, and transmitting power in order.
e.g.:
Send “AT+RX” command to module, and the module returns “OK+FU3\r\n
OK+B9600\r\n OK+C001\r\n OK+RP: +20dBm\r\n”. (“\r\n” means return\newline)
⑧
AT+Uxxx
Set data bits, check bit and stop bit of serial port communication. For check bit, N
means no check, O means odd check, and E means even check. For stop bit, 1 means
one stop bit, 2 means two stop bits, and 3 means 1.5 stop bits.
e.g.:
To send serial port format to be eight data bits, odd check, and one stop bit, please
Send “AT+U8O1” to module, and the module returns “OK+U8O1”.
⑨
AT+V
Inquire firmware version information of module.
e.g.:
Send “AT+V” command to module, and the module returns “HC-12_V1.1”.