Figproxy is a tool that enables rapid prototyping of tangible user experiences allowing Figma prototypes to talk to the external world.
More specifically, it's a utility that allows bidirectional communication between Figma and physical hardware for prototyping interactions that involve screens and physical elements like motors, lights, sensors etc.
It's designed to talk to hardware prototyping platforms like Arduino.

PlatformIO is an open source ecosystem for IoT development
Cross-platform build system. Continuous and IDE integration. Arduino and MBED compatible

Codebender is an embedded development platform with an emphasis on the Arduino and it’s completely web-based, so you don’t have to install, manage and update anything.