Not sure if Web Serial APIs count, but I'll run with it.
I created a two-part project: a web app you configure ad simulate a few* peripherals in, and a bridge device that can interact with the simulated peripherals. Essentially, a bridge between the physical microprocessor you've programmed, and the web app. Doesn't work on Firefox because those APIs aren't available however.
* few being one of seven-segment display, "ultrasonic sensor", and a simple LED.
I created a two-part project: a web app you configure ad simulate a few* peripherals in, and a bridge device that can interact with the simulated peripherals. Essentially, a bridge between the physical microprocessor you've programmed, and the web app. Doesn't work on Firefox because those APIs aren't available however.
* few being one of seven-segment display, "ultrasonic sensor", and a simple LED.
https://github.com/sk0g/peripheral-emulator-bridge
https://github.com/sk0g/peripheral-emulator-web-app