a fun project based on the HowToMechatronics's robot arm.
https://howtomechatronics.com/tutorials/arduino/diy-arduino-robot-arm-with-smartphone-control/
I replaced the HC05 and smartphone pilot by an android Things kit made by google. For this version of the app, there are 6 sliders on the screen, each driving a servo of the arm.
This need to be improved, as this is the first android and android Things app I'm doing, but i think this is a good start.