The UNTZtrument and HELLA UNTZtrument are both great options if you want an easily hackable open-source grid based MIDI controller. But what if you want to free yourself from USB cables during a live performance with your UNTZ?
In this guide, we will replace the Arduino Leonardo used in the standard UNTZtrument with either the Feather M0 Bluefruit LE, or the Feather 32u4 Bluefruit LE. This small hardware change will allow us send MIDI data wirelessly to computers and mobile devices using MIDI over Bluetooth LE.
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