Luca Dentella has another useful tips-and-tricks-like blog about using the Chrome browser’s functionality for interfacing with serial ports, including a pre-packaged ‘Serial Monitor’ Chrome App that is likely already compatible with your Chrome device and OS. That said, don’t expect to be using the Chrome app launcher for much longer.
I asked myself how I could create a really cross-platform interface, that is an interface that can run also on Linux and Mac. You may consider to use a programming language that has a compiler/interpreter for almost all the operating systems, like Java (a solution for the .Net Framework could be the Mono project) or Phyton. Developing a GUI with those languages however requires the use of dedicated frameworks, sometimes made by third party developers. In addition, Sun/Oracle only defined the specification of the Java’s serial communication APIs (javax.comm); you therefore need to adopt an external library (the most famous one is RxTx) that implements those APIs .
Today I’m going to describe you a way to develop cross-platform applications with the same techniques you use to develop web sites and without requiring external libraries: the Chrome Apps.
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.