How to update the device

1. Download and un-zip the latest firmware from here: Downloads
2. Hold your Cerise transmitter and press and hold the BOOT button (1)
3. While holding the button down, plug the transmitter in your computer with a USB type-C cable
4. A new mass storage device should appear called RPI-RP2, drag and drop your CeriseFirmwareXXX.uf2 file onto it
5. Wait until the transfer is complete, then power cycle the unit (unplug it, then plug it back in)