Chao at 07:55, 19 October 2021

2021-10-19T07:55:11Z

New page

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

== Switch Mode ==

* 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)
=== Status and Control ===
{| class="wikitable sortable"
|-
! 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 || -
|}

== EMBT_S02 Features ==
[[File:EMBT02 diagram.png|thumb|right]]

=== Audio Source Transmission Function ===
* 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
=== Audio Receive Function ===
* Support dual sound channel output, so left +right
* Support AUX 3.5mm in.
* Support to play MP3 or WAV from U disk
* Support to use as USB sound card and USB sound MIC

=== Other Note ===
* 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.

== Demo Video ==
* Pair with audio play box, and send human voice via speaker - https://twitter.com/electro_phoenix/status/1114019811690856452
* Pair with audio play box, and PC -> audio -> AUX_IN to play - https://twitter.com/electro_phoenix/status/1401807228126908429?s=20

[[category: EDMBT]]

EMBT-S02 - Revision history

Chao at 07:55, 19 October 2021