Color Switcher

A Raspberry Pi Pico project that sends commands over UART to a connected computer. Written entirely in C using the Pico SDK.

Prerequisites

• Docker and Docker Compose

No local toolchain installation needed — everything runs inside the container.

Building

# Build the Docker image (first time only, or after Dockerfile changes)
docker compose build

# Compile the firmware
docker compose up

The .uf2 firmware file will appear in build/.

Flashing

1. Hold the BOOTSEL button on the Pico and plug it into USB
2. It mounts as a USB mass storage device
3. Drag the .uf2 file from build/ onto the Pico
4. The Pico reboots and runs the firmware

Interactive Shell

To drop into the build container for debugging or manual commands:

docker compose run --rm pico-build bash