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MCH2022 badge autoflasher package

This is intended for use during the sweatshop and at camp.

How to use

  1. sudo apt-get install libusb-1.0-0 (or something alike)
  2. Clone this repository
  3. pip install pyserial
  4. Copy build files, including flashargs, to the esp32 folder
  5. Run ./prepare (needs sudo to install udev rules)
  6. Run ./flash
  7. Flash badges
  8. When done, ./remove_udev_rules

How it works

When the udev rules are installed, connecting a badge with the RP2040 in boot select mode[1] will trigger the first rule which runs picotool with the bus and device number as arguments. This flashes the RP2040 after which it will reboot.

Running ./flash starts esp32/badge_multiflash_daemon.py, which continuously looks for newly connected serial devices. When one is connected, it checks the minor node number on the tty device to distinguish between the different serial interfaces on the badge. If the minor node number is 0, that means it is the serial bus to the ESP32 and it will use esptool.py to flash the ESP32. After flashing, it waits for the device to disconnect before going back to checking for a connected device.

1: Blank badges will be in boot select mode when they are powered on. To get a badge which already has firmware into boot select mode, power it up while pressing SELECT.