OPT3001 read not working

Hi, Looks like the module itself is definitely not good then! Thanks for poking around.

This won't work, because it's just writing 8 bits:

i2c.writeTo(adr, [REG.CONFIG, 0b1100110000010000]);

Try

i2c.writeTo(adr, [REG.CONFIG, 0b11001100, 0b00010000]);

It might work after that?

Getting the result data should be easy enough, something like:

var lux =  0.01 * ((d&0x0FFF) << (d>>12))

might work?