(real view of the lcd keypad shield) Now it is clear, a MCP9700A temperature sensor connected to the Arduino analog input pin A1 is used to measure temperature. The Arduino sketch for the experiment ...

This isn’t about connecting a temperature sensor in your Arduino. ... The temp sensor 3 pin devices are simple and cheap but good for 0.5 deg C precision or nearly a full degree in human measure.

The Arduino compatible Pax Instruments T400 Temperature Datalogger is now available to purchase priced at $175 from Adafruit. If you liked this you might also be interested in building an Arduino ...