Arduino Serial App, a phone ready PWA for connecting to Arduinos over the USB serial interface, providing a simple serial input and output terminal. Installable PWA (Chrome only) here: https://a-j-bauer.github.io/asa/
Tested Arduino devices:
- Uno (genuine)
- Leonardo ETH (genuine)
- MEGA 2560 R3 (genuine)
- MEGA 2560 R3 (clone)
- NANO (clone)
For phones you need an OTG USB cable.
Source Note: The serial.js is a modified version of Google's Serial Polyfill from here https://github.com/google/web-serial-polyfill. The modified version helps to get the PWA to also works with Arduino clones on Android phones (Apple not tested).