RP2040 microcontroller gains SSH server via custom firmware
Developer Ricardo Marques created custom PlatformIO firmware that runs an SSH server on RP2040-based boards with W5500 Ethernet, enabling remote shell access to microcontrollers.
Summary
Ricardo Marques developed open firmware that brings SSH connectivity to the RP2040 microcontroller used in Raspberry Pi Pico and compatible boards. The implementation requires a W5500 TCP/IP controller for wired Ethernet and currently exposes basic GPIO control through a shell session. The project demonstrates SSH as an alternative to serial, Bluetooth, or WiFi for remote device management on constrained hardware.
How the SSH-on-Pico implementation works
- Hardware: WIZnet W5500-EVB-Pico or any RP2040 board plus separate W5500 module for TCP/IP and RJ45 Ethernet
- Firmware stack: Built in PlatformIO, combining Arduino-Pico Ethernet drivers with layered TCP/IP and SSH modules
- Deployment: Clone repository, configure static IP or use defaults, generate SSH keys, build and flash to RP2040
- Access: Default account "sshrp", standard SSH client connection with key fingerprint confirmation
- Current capability: Shell commands limited to onboard LED control (on/off/blink/status)
- Extensibility: GPIO-based control can be expanded to other peripherals connected to the development board
Why it matters
The project provides a reference implementation for adding encrypted remote management to low-cost microcontroller deployments without relying on wireless stacks or serial converters, potentially simplifying headless IoT and automation setups.
Original reference: www.hackster.io →