Data poller for SQM-LE sky quality meter
The SQM-LE device measures how dark the sky is in mag/arcsec^2. More information on how the device works can be found here: http://www.unihedron.com/projects/sqm-le/
The device can be bought from Teleskope-Service (among other providers). Link to the device: http://www.teleskop-express.de/shop/product_info.php/info/p3792_Sky-Quality-Meter-mit-Linse-und-Ethernet-Anschlu-.html
A user manual for the device can be found here: http://www.unihedron.com/projects/darksky/cd/SQM-LE/SQM-LE_Users_manual.pdf
Here is an FAQ for the device: http://www.unihedron.com/projects/darksky/faqsqmle.php
For outdoor instalations the SQM device can be housed in one of these: http://unihedron.com/projects/sqmhousing/
The housing can be bought from http://www.teleskop-express.de/shop/product_info.php/info/p5320_Wetterschutzgehaeuse-fuer-das-SQM-LE--incl--PoE-Adapter.html (it includes a PoE connector)