My father has got a solar water heater system with a SPIII Solar Water Heater Controller. The controller itself is some crappy closed source with a bad interface (non-standard compliant HTML interface) - however it works.
So far we are able to collect data from the SPIII Solar Water Heater Controller using
curl and from the Current Cost device (via cosm.com as proxy) using the following bash code:
The result so far in emoncms: