Get hints from here: https://github.com/SBFspot/SBFspot/blob/420a1b22c330c985b1b2c01e14d45930a86b75b9/SBFspot/SBFspot.cpp
Reduced solution: https://community.openhab.org/t/example-on-how-to-access-data-of-a-sunny-boy-sma-solar-inverter/50963