The Primos is a solar thermal controller manufactured by prozeda. The device has an SD card slot that can be used to log sensor readings but unfortunately this log is in a binary format that requires a windows only program to view the data.

This project is an attempt to reverse the binary format so data can be extracted programmatically.

The device with WiFi SD card attached:

You should be able to read logs for any of the other primos devices.

For further info you can see a simple example implmentation using a wifi sd card here: https://github.com/gotbadger/solar-monitor