MAX31865 and PT100 problem I have a strange problem with the MAX31865 and the PT100. Every time when I start the system it shows that the temperature is -242 and the RTD value is 0 and so on.
But When the system is in the loop() and when I unplug the power cable of the MAX31865 and put it back on, it shows the right temperature. The same happens when I start the serial monitor.
Connected a 330nF capacitor between one pin of the PT100 to -DC, and one 330nF between -DC and ground.