This device tree overlay is provided to enable the functionality of the Coral
Environmental Sensor Board.

For Raspberry Pi platforms:

The included EEPROM is already flashed with this overlay. No additional steps are needed.
If customization of the blob is desired, dtc is used to compile the overlay:
dtc -@ -I dts -O dtb -o coral-enviro-board.dtbo coral-enviro-board.dts

It is also possible to overwrite the EEPROM. In order to do this:
1) Short JP1 (a solder bridge) to unlock the EEPROM.
2) Enable I2C0 access (add dtparam=i2c0=on to config.txt in the boot partiton).
3) Rebuild and flash following instructions at https://github.com/raspberrypi/hats/tree/master/eepromutils


For Coral platforms:

The overlay can be put in the boot folder in order to automatically load on boot.
Once added to /boot, modify overlays.txt to add coral-enviro-board
(e.g overlays=coral-enviro-board).

If customization of the blob is desired, dtc is used to compile the overlay:
dtc -@ -I dts -O dtb -o coral-enviro-board.dtbo coral-enviro-board.dts