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avr109-webserial

Inspired by https://github.com/noopkat/avrgirl-arduino

Background

For our assistive device FABI & FLipMouse we currently develop a WebSerial based GUI to adjust the settings.

One main missing feature was the update process for the included Arduino Micro and TeensyLC.

This project aims to be a proof-of-concept for WebSerial based Arduino Micro updates.

Initially, I wanted to extend the AVRGirl project, but this project is node.js based. We just need plain JS to be supported in the browser.

Caveats

Because this is a simple proof of concept, some features are still missing or implemented just for Arduino Micro:

  • Fixed page size of 128Bytes
  • No verification of the flashed content (as it is done by avrdude in Arduino)
  • Just one USB PID/VID pair is used, there are probably more!
  • The WebSerial feature of Chromium does NOT allow to open 2 ports with 1 user interaction. But the Arduino Micro running and its bootloader use 2 different PID/VIDs, so 2 user interactions are required (extra "Reset" button)

How to use

  1. Select the corresponding .hex file
  2. Press "Reset" and select Arduino Micro device
  3. Press "Upload" and select the Arduino Bootloader device

Note: if there is no available device once "Upload" is pressed, try to press "Reset" again and immediately press "Upload" again.

Note: if there is no Arduino shown at all, please open an issue and tell me your PID/VID combination.

Acknowledgements

@noopcat for avrgirl-arduino which provided the HTML code.

@bminer for intel-hex.js which provided the Intel HEX file parser

and of course: stackoverflow :-)