I have tested the SHT31-F I2C temperature and humidity sensor using the 5V power output and the DFRobot_SHT3x-master library. It fails on the sht3x.begin() function call. I have previously successfully tested the some configuration on an Arduino Duemilanove.
My configuration on the Arduino UNO WIFI Rev2 was tested both with and without 10K pull up resisters on the SDA and SCL connections and both configurations failed.
I then tested again using the 3.3V power output and it works both with and without the pullup resistors.
I note that the power output of the 5V pin on the Arduino UNO WIFI Rev2 is < 5V and the output on the Arduino Duemilanove is > 5V.
Is there an explation for this anomoly?
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