Firmware using tinyusb to turn a Raspberry Pi Pico into a device that works with Elgato's Stream Deck software.
- Grab the latest uf2 from the releases page, here
- Press the BOOTSEL button and hold it while you connect the other end of the micro USB cable to your computer.
- Drag the uf2 to the pico flash drive that shows up
- Wait for it to reboot
- Done!
Pins 2,3 switch 1
Pins 7,8 switch 2
Pins 12,13 switch 3
Pin 34 neopixel data
Pin 40 neopixel power
Pin 38 neopixel ground
I used the ring here: https://www.adafruit.com/product/1643
It should be trivial to wire this up to exisiting foot pedal hardware or arcade buttons.
I went a little overboard and built the foot switch that Adafruit shared:
Pico mount here: https://github.com/DDRBoxman/picodeck/blob/main/enclosures/pedal/pi-pico-holder.stl
brew tap ArmMbed/homebrew-formulae
brew install arm-none-eabi-gcc
mkdir build
cd build
cmake ..
The protocol mostly matches the existing Stream Deck devices but with a few tweaks for the pedal.
Debugger breakpoints on the RP2040 and wireshark with a real Stream Deck pedal were very helpful at figuring out how the Stream Deck software talks to the devices.
When the software starts up it asks the device for a software version number and then a serial string, as long as both of these respond the device shows up in the Stream Deck software.
The pedal has a new command on the output endpoint to set the led color:
02 0b FF FF FF
R G B
The input endpoint report for the pedal is shorter than the proper stream decks:
01 00 03 00 00 00 00 00
button: 1 2 3
https://github.com/todbot/hidpytoy
https://www.wireshark.org