BLE-sustain-pedal

Bluetooth MIDI sustain pedal adapter. Any sustain pedal with 6.5mm jack can plug into.

Why to use

Some exceptional bluetooth MIDI keyboard controllers, such as:

lack dedicated sustain pedal port.

To solve this issue, plug any 6.5mm jack sustain pedal to the BLE-sustain-pedal adapter instead. It periodically checks pedal on/off status and sends appropriate sustain pedal MIDI message via its bluetooth connection.

Features

Pedal polarity auto detection.
Power/Bluetooth and Pedal-On LED indicators.
Powered by micro USB cable, 5W.

User Guide

How it works

Real device picture

The housing is utilized micro screwdriver tool box.

Inside the box

Hardware list

ESP-WROOM-32 DevKit V1 or similar
LED diodes (2x)
Resistors 1kOhm (3x)
Wires (6x)
Female jack 6.5mm
Breadboard
Suitable housing

Software

Arduino IDE
Arduino-BLE-MIDI library

Useful links

BLE-sustain-pedal User Guide

Plug a sustain pedal to the 6.5mm connector of BLE-sustain-pedal device.
Power the BLE-sustain-pedal on by attaching the micro USB cable connected to a power bank or wall adaptor.
The pairing LED starts blinking, waiting to be connected. In the bluetooth device list, BLE-midi-pedal has a rather generic bluetooth id, such as 4F41CA98-0.... Pair it in your tablet or other device.
After BLE-sustain-pedal is connected successfuly, Pairing LED lights continuosly.
The BLE-sustain-pedal device is ready. A pedal status LED lights whenever the attached sustain pedal is pressed.

Notes:

By default, BLE-sustain-pedal sends pedal message on MIDI channel 1.
While BT pairing is in progress, be sure the sustain pedal is both attached and not pressed, so the pedal polarity is recognized properly.
Only switch mode pedal is supported. Continuous pedals may not work with BLE-sustain-pedal.
if the pairing LED is not blinking after power on, unplug the micro USB cable and attach the cable again.

tomaskraus/ble-sustain-pedal