AVR-IBus.A2DP
`BT A2DP Extension for AVR-IBus Modul`

Description

This will get an Extension Board for AVR-IBus.public Basic Modul. To use the BMW Radio Mode [CD] as Bluetooth Audio Device.
Steps:

design Extension PCB
code ESP32 Code for Bluetooth A2DP
Side ESP32: code Communication with Atmega2560
Side Atmega2560: code Communication with ESP32
Code cleanup

BOM

ESP32
PCM5102A
...

Wiring

PCB

Commands & States

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Command	Description
`CQ`	Connection state Request
`CP`	Confirm Paring Pin

`MQ`	Music state Request
`MS`	Music Stop
`MH`	Music Pause
`MM`	Music Play
`MP`	Music Previous Track
`MR`	Music Fast Rewind
`MF`	Music Fast Forward
`MN`	Music Next Track
`MQ`	Music sate request
`MQ`	Music sate request

`TQ`	Track Meta Data Request

`VU`	BT Device Volume UP
`VD`	BT Device Volume DOWN

`EQ`	3Band EQ Requests
`EU`	Gain all Bands Up
`ED`	Gain all Bands Down
`EB+`	Gain Bass Up
`EB-`	Gain Bass Down
`EM+`	Gain Mid Up
`EM-`	Gain Mid Down
`ET+`	Gain Treble Up
`ET-`	Gain Treble Down
`EN`	Gain Reset all Bands to 1.0

`SR`	Settings Reseet
`SN:MyName`	Set BT Device Name to `MyName`

States	Description
`C0`	Disconnected
`C1`	Connecting
`C2`	Connected
`CA`	Returns connected Sender MAC-Address `example CA:11:22:33:44:55:66`

`M0`	Music is stopped or paused
`M1`	Music is playing
`M2`	Music skips back or prev Track
`M3`	Music fast rewind Track
`M4`	Music fast forward Track
`M5`	Music skips next Track

`TA`	Track Artist
`TT`	Track Title
`TL`	Track Album
`TP`	Track Position (in seconds)
`TA`	Track Length (in seconds)

`EL`	Gain Bass Level `example EL:1.1`
`EM`	Gain Mid Level `example EM:1.1`
`EH`	Gain Treble Level `example EH:1.1`

Used Librarys:

ESP32-A2DP by pschatzmann
arduino-audio-tools by pschatzmann
Arduino
ESP32 Package by Espressif

Project Progress/Milestones

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