I installed an external temp sensor to cool the controller through fans in case it reaches 40°C.
Therefore I noticed that the internal temp sensor always shows 6° too much, no matter if it's day or night.
Yes, I double checked the external sensor electronics with another temp meter - they show the same...
Is there any way to recalibrate the sensor of the controller to get accurate measurements?
Thanks a lot in advance and happy sun ray hunting,