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CAN_A2DP_Sink.ino
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# ESP32_bluetoothmedia An esp32 used as a2dp sink attached to the bmw canbus for steering wheel controls ## Imported libs * https://github.com/pschatzmann/ESP32-A2DP * [https://github.com/nhatuan84/esp32-can-protocol-demo](https://github.com/pierremolinaro/acan-esp32) ## Used parts * ESP32: https://de.aliexpress.com/item/1005004491534008.html * External DAC: https://de.aliexpress.com/item/33004561102.html * CAN transceiver: https://de.aliexpress.com/item/1005002844175352.html * AUX pinout adapter (not really necessary, since the external DAC has output pins to attatch to): https://www.amazon.de/gp/product/B009PH1IG4 * DC 8V-32V to DC 5V transformer: https://www.amazon.de/gp/product/B09B818N5F * Random USB-A to USB-C cable ## Wireing * CAN 3.3V -> ESP 3.3V * CAN Ground -> ESP Ground * CAN RX -> ESP pin D4 (GPIO 4) * CAN TX -> ESP pin D5 (GPIO 5) * DAC 3.3V -> ESP 3.3V * DAC Ground -> ESP Ground * DAC FLT -> ESP Ground * DAC DMP -> ESP Ground * DAC SLC -> ESP Ground * DAC BCK -> ESP pin D26 (GPIO 26) * DAC DIN -> ESP pin D22 (GPIO 22) * DAC LCK -> ESP pin D25 (GPIO 25) * DAC FMT -> ESP Ground * DAC XMT -> ESP 3.3V * ESP USB-C -> Transformer USB-A **Remember to short the pins on the can transceiver, if you don't need the 120 Ω resistor as an endpoint.** ## Features * Automatic reconnect to the last connected device is handled by the ESP32-A2DP-library ## Todos (maybe?) * Set volume on bluetooth connect automatically to the maximum of the bluetooth device ## Ideas for your own implementation: * a2dp can receive information about the song that is currently playing. You could attach a display to show the current artist and title.

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