Choose update driver and manually locate the driver. Go to Device manager in Windows and select the Unknown USB Device.If this is the case, follow the next step. You then have to install the driver manually. It's possible that it won't open the connection at this point. To make sure you have the ATmega16U2 one, check the chip on the board. There are some versions of the Uno with a ATmega8U2 chip. Windows will install an unknown USB device. Disconnect and connect the Arduino Uno again.You know it worked when the Arduino is no longer recognized as a COM port in the Arduino IDE. Short the two pins (see picture below) with a wire.Connect the Arduino to a free USB port.The 'compiled-firmwares' folder is important. After changing the firmware, the Uno is no longer recognized in the Arduino IDE. Make sure the sketch is uploaded to the Uno.These are then recognized in your favourite DAW or VST (like Guitar Rig or Amplitube) and can be programmed to do all sorts of stuff.Īfter uploading the sketch, it is time to change the firmware of the Arduino Uno. Using the MIDI.h library I programmed the Wah pedal, the two foot switches and the three potentiometers and the on-off switch to send MIDI control change messages.

The first thing you have to do is upload the sketch (see code section). Many cheap Arduino knockoffs that pretend to be an Uno or Mega also might not work, since they tend to use the (slighly) cheaper FTDI chips. Leonardo), nor older boards that use an FTDI chip as USB controller (e.g. HIDUINO takes advantage of Arduino boards where a second AVR chip is used as the USB controller, so it won't work with single chip variants (e.g. Instead, HIDUINO provides a true USB-MIDI device for plug-and-play compatibility on Windows, OSX, and Linux - just like a commercial MIDI controller. HIDUINO does not use middleware software to convert serial messages through a MIDI loopback port (like LoopBe1 on Windows or IAC on OSX). From their GitHub page: The HIDUINO project provides firmwares, documentation, and example code for building a class-compliant USB-MIDI device from an Arduino UNO or Mega 2560. I think the hardest part is flashing the firmware of the Arduino Uno to change the USB connection from a serial communications port to a sound, video and game controller in Windows (I have not tested this on a Mac). This Arduino-based MIDI controller cost me around 40 Euro, including a seperate Wah pedal and foot switch.

After some online digging I found out that it's relatively easy to build one yourself for a fraction of the cost. When I was looking to buy a MIDI stomp box with a Wah pedal, I was a little taken aback by the price.

Arduino uno microchip flip