v0.1 has been sitting on my desk for a few months now. It mostly "just works" but recently I've been running into issues with the MLX90640 sensor not being recognised.  When I get time I'll look at the I2C lines on the oscilloscope and try to work out what's going on. The Arduino software is a mess (this is why I haven't shared it yet, sorry!) but this doesn't explain the intermittent faults. More updates to follow....