EMBT-S02

Gernernal Info

dimension 49 x 25 mm
voltage supports battery +4.2V from soldering pads, or 5V USB, the chip has internal LDO

Hold down button first, and connect power USB, check LED status
Note to use TX and RX mode, please only connect USB power (powerbank), not data (not to PC or so)

Mode	LED	Button Short Press	Button Long Hold	Jack
Transmitter Mode	Very Fast Blink	sound volume	pause	AUX / Audio In -> TX out
Reiceiver Mdoe	Normal Slow 1sec Blink	sound volume	switching device mode: bluetooth, AUX	RX in -> EP/ Audio Output
USB Sound Card Mode	Constant on	sound volume	-
OFF Mode	Constant on	switch device TX/RX mode	-

Support to send MP3 audio source from 3.5mm AUX in, output dual channels output tranmission
Support to send MP3 audio source from U disk playback (customize only, not available on this standard board)
Support to send MP3 audio source from computer USB sound card
Support bluetooth speaking from on board microphone

Only can pair with one receiver when in transmission mode
Support bluetooth earphone, audiobox, car audio box, etc,
The receiver audio device password must bee 0000, most device are so
Module both transmission and receiving are dual sound channel mode
Transmission distance is 10M
If multiple devices are pairing, it will connect randomly, but only connect to one target
Short press to control sound
please notice when connect to PC USB, it will be act as USB sound card, can not be paired, LED also blink in different frequency.
On board serial port for developer testing only, you can not use it.