CroPDUster

Network-attached PDU (Power Distribution Unit) controller for the Raspberry Pi Pico (RP2040), replacing the original PIC18-based firmware.

Features

• 8 relay-controlled power outlets (GPIO 0-7)
• W5500 Ethernet with DHCP
• HTTP server with single-page web UI
• REST API for GPIO control, sensors, user management
• HTTP Basic Auth with multi-user support and per-port ACL
• OTA firmware updates via HTTP (A/B partition with embassy-boot)
• Persistent configuration via ekv key-value store
• Factory reset via GPIO 26 or admin API

Quick Start

# Build everything
cargo xtask dist

# Flash via probe-rs (recommended for development)
cargo xtask flash --probe

# Or flash via UF2 drag-and-drop
# Hold BOOTSEL, connect USB, drag build/combined.uf2 to RPI-RP2

# OTA update a running device
cargo xtask flash --ota <device-ip>

See CLAUDE.md for detailed build instructions, architecture, and API documentation.

Prerequisites

• Rust nightly (2026-02-01) with thumbv6m-none-eabi target
• elf2uf2-rs, flip-link
• Optional: probe-rs for probe-based flashing and RTT logging

Project Structure

application/   Rust application (HTTP server, GPIO, auth, web UI)
bootloader/    embassy-boot-rp bootloader
xtask/         Build/flash helper (cargo xtask ...)
archive/       Original PIC18 firmware tooling (reference only)

Trivia

A cropduster is a type of old agricultural airplane used to supply crops with fertilizers. Not only is it one of the only words in the dictionary having the letters PDU in it to form a nice pun, but it also easy to draw a logo for it.

License

BSD 3-Clause -- see LICENSE.