Third parties

A Juno program runs on the board, but much of what it does reaches hardware made by someone else: a display or an SD card on a shield, a sensor plugged into a Grove socket, a LEGO motor across a Bluetooth or infrared link. Juno talks to all of it from plain Java. Each integration is a small class in juno-api with no Arduino library behind it, or a thin compiler intrinsic over the board's own library, so the same program style works whatever is attached.

Third party	What Juno does with it	How it connects	Page
Arduino shields	Drives displays, touch panels, buttons, SD cards, motion sensors and Wi-Fi on boards that plug onto the UNO or Nano headers.	The board's headers: GPIO, SPI, I2C and analog pins.	Arduino Shields
Grove	Reads Seeed Studio's Grove sensors (temperature and humidity, light, sound, motion, gas, compass) with allocation-free drivers.	A Grove socket on the Grove Base Shield or the Nano Connector Carrier.	Grove
LEGO	Remote-controls LEGO Powered Up hubs, and the Mindstorms RCX and Scout bricks: motors, lights, sensors, sound and battery.	Bluetooth LE for Powered Up; infrared for the RCX and Scout.	LEGO