Wow, @Ken , thanks for adding support for storing these values in SGP. That's really quick, and I look forward to trying it in a future beta.
@MicroAstro , I've had a go at writing my own ASCOM driver for the Unihedron SQMs that appear as serial ports. E.g. the SQM--LU or SQM-LR. This driver tracks sky quality and environmental temperature. I have no idea if it works with the Ethernet versions, and I have no way to try. If you'd like to be a guinea pig, send me a message!
@Chris , that makes sense. It sounds like the environmental values are potentially useful both stored along with the images,and as triggers to take remedial action.