Antenna

Module reset pin, active low;

TTL serial port output, currently only reading the module version is available, can be floating when not using;

 TTL serial port input, currently only reading the module version is available, can be floating when not using;

Debug clock pin, can be floating when not using;

Debug clock pin, can be floating when not using；

Positive reference of module power supply, voltage range: 2.3~5.5V DC,3.3V or 5V is recommended;

 The transceiver mode control pin of the module, low-level transmit mode,high-level receive mode, cannot be left floating;

Debug control pin, enter program programming mode for low-level module, can be floating when not using;

Channel 3, combined with CH0, CH1, CH2 to select 16 working channels, see the channel table for details;

Channel 2, combined with CH0, CH1, CH2 to select 16 working channels, see the channel table for details;

Channel 1, combined with CH0, CH1, CH2 to select 16 working channels, see the channel table for details;

Channel 0, combined with CH0, CH1, CH2 to select 16 working channels, see the channel table for details;

Audio input is negative, please refer to the recommended circuit for hardware design;

 The audio input is positive, please refer to the recommended circuit for hardware design;

Audio output is negative, see the recommended circuit for hardware design;

The audio output is positive, please refer to the recommended circuit for hardware design;

1、3、15、19、

34、35

36

Module ground

4、5、7、8、

9、10、13、

14、18、21、

22、24

Reserved for unused, pending processing;