Here’s the matching student demo for the MIT App Inventor Oven thermometer I made. This way students can test the thermometer simple by touching the sensor
You’ll need some flavor of Adruino, a Bluetooth SPP module, and a Dallas 1820 temperature sensor to actually make the demo work.
I used another of these small 328 based boards and the same Bluetooth module. The DS1820 only needs a pullup resistor.
This code also updates every 400 ms.
Here’s a quick movie.
The code can be found here: