{"id":1088,"date":"2021-07-01T15:06:09","date_gmt":"2021-07-01T05:06:09","guid":{"rendered":"https:\/\/gonzos.net\/projects\/?page_id=1088"},"modified":"2025-07-27T22:05:37","modified_gmt":"2025-07-27T12:05:37","slug":"ble-midi-receiver","status":"publish","type":"page","link":"https:\/\/gonzos.net\/projects\/ble-midi-receiver\/","title":{"rendered":"BLE MIDI Receiver"},"content":{"rendered":"\n

Updated 7 July 2021<\/p>\n\n\n\n

I have a couple of the Yamaha UD-BT01 BLE MIDI transmitter adapters, and in the past I have used a Raspberry Pi computer to receive the transmitted MIDI and pass it on to a synth. This required the Rpi computer and an and a MIDI adapter. With the recent improvements in Arduino-style devices, it has become possible to make a very small BLE-to-DIN-Plug receiver. This document has details of the one I made with a ESP32 chip. Unfortunately a BLE to USB device is not currently possible using an Arduino-style chip, as no-one has put BLE and USB MIDI into one package (that I am aware of).<\/p>\n\n\n\n

The device I used is a NodeMCU ESP 32S. It’s a simple-enough project that was pioneered by my German colleague Petra. I’ve had some requests for info about it so I thought I’d put this document together.<\/p>\n\n\n\n

Basic Operation<\/h2>\n\n\n\n

The device looks like this:<\/p>\n\n\n\n

\"\"<\/a>
^ Outside view ^<\/figcaption><\/figure><\/div>\n\n\n\n
\"\"<\/a>
^ Inside view ^<\/figcaption><\/figure><\/div>\n\n\n\n

The device is set up so that it will:<\/p>\n\n\n\n