The rd200m library works with Arduino, Particle and other related boards (ESP32, etc.) and it provides many functions to communicate with the RD200M radon sensor module using a serial interface.
I²C 7 Segment Led Library for Arduino, Particle, and Raspberry Pi
by 
gary
gary
The I2c7SegmentLed library works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) microcontroller boards and it provides many functions that make it easy to use the 7 Segment Led display modules (which use the I²C communication protocol).
I²C Keypad Library for Arduino, Particle and Raspberry Pi
by gary
gary
The I2cKeypad library provides easy to use functions for reading a matrix keypad. Library functions such as getKey(), peekKey() and getKeyCount() are included. The I2cKeypad library works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards and it provides many functions to communicate with matrix keypads that use the I²C communication protocol using the MCP23008 interface chip.
I²C OLED and LCD Character Display Software Library for Arduino, Particle and Raspberry Pi
by gary
gary
The I2cCharDisplay library works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards and it provides many functions to communicate with OLED and LCD character display modules that use the I²C communication protocol.