I recently had the need to add RTS/CTS handshaking to the serial connection between my PC and my ATMega. I struggled with it for a time due to some misunderstandings on my part, and because I couldn’t find a writeup which described how the handshaking is supposed to work, and (more importantly for me) how it’s supposed to look. I eventually got it to work, and wrote it up in a way that would’ve been useful for me when I was trying to figure out how to make it work.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.