Function Description:
Bluetooth V 4.2 version, support Bluetooth automatic connection technology, support WAV/WMA/FLAC/APE/MP3 lossless decoding, stereo dual channel output.
After the module is powered on, the mobile phone searches for the Bluetooth name M18/M28/M38, and can play music after connecting Bluetooth.
Module blue indicator light:
When the Bluetooth is not connected, the indicator light flashes quickly;
When the Bluetooth connection is on, the indicator light is always on;
When the Bluetooth is playing, the indicator light flashes slowly.
M28(HW-407):
PIN-----------Description
5V------------5V
GND---------GND
VBAT--------Lithium battery 3.7V power supply 3.7V - 4.2V
L---------------Left channel
R--------------Right channel
AGND-------Audio GND
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Package Includes:
3 * M28(HW-407) Wireless Bluetooth MP3 Audio Receiver Board