Temperature sensor with steel head compared to SHT11

[JackTheVendicator]

@catalinbujdei

During the yesterday tests I observed that the 3.3V of the Seeeduino Stalker v2 board are actually 3.2V. In this case the (default) reference of the ADC should be also 3.2V (corresponding to the 1023 digital value). Please correct me if I’m wrong. I try to use the voltage provided on 3V3 pin as reference for ADC, on AREF pin … but still got different values between the 2 sensors types.
Thank you.

Is the ATmega Vcc 5V or 3.3V? I remember the datasheet said Aref can’t be at a higher voltage than Vcc…