This isn’t about connecting a temperature sensor in your Arduino. ... or an artifact of the interrupts/code ... The temp sensor 3 pin devices are simple and cheap but good for 0.5 deg C ...

In the code we use function read_temp() that returns an integer, in our case the temperature. Inside the function we start the transmission by using function beginTransmission() from the Wire object ...

I made this project because I wanted a way to automatically control the speed of a DC fan according to the temperature read by a LM35 sensor. I had a few problems with the PWM part mainly because the ...