A question about inaccurate sampling with thermistor (involving WIFI module)

[CousinItt]

Hi, you haven't said where your thermistor is located. If it's off the board and connected by wires, it could be interference from the wifi module, but I don't think this is particularly likely. If your thermistor is on your board, it's probably being warmed up by the heat being produced locally - about 1.3 W to 1.75 W. It will heat up more when your wifi module is in use. Have you tried thermally isolating the thermistor - e.g. putting it on thin wires a good distance from other components?