Quadruple I/O firmware 3.22 update (WINDOWS method)

Download .zip with firmware and .hex uploader:

Disconnect Quadruple from DC power and connect it to your Windows PC using micro-USB data cable.

Open HexUploader.exe from the .zip file above.

Select .hex firmware file to upload and select Serial COM port, press Upload Hex.

Perform “factory reset” after flashing (A+D hold on boot). Check Quadruple I/O manual