- https://learn.pimoroni.com/article/getting-started-with-tufty-2040
- https://www.raspberrypi.com/documentation/microcontrollers/rp2040.html
- https://tinygo.org
- https://tinygo.org/docs/reference/microcontrollers/pico/
- https://tinygo.org/docs/reference/microcontrollers/tufty2040/
- GPIO25: LED
- GIO26/ADC0: Light Sensor
- GPIO22: Up Switch
- GPIO6: Down Switch
- GPIO7: A Switch
- GPIO8: B Switch
- GPIO9: C Switch
- GPIO23: Boot/Usr Switch