The Device

The temperature device

We're going to build a device (hardware and software) that can accurately measure the temperature of human skin. It's 2021 and pointing a pistol-grip thermometer at your forehead is a pretty normal thing to do. Our device won't have a display attached, it's just going to broadcast a Bluetooth LE characteristic that can displayed on a phone or in a web browser.

Parts List

The parts list is simple, it's a Raspberry Pi 3 model B, and an MLX-90614 infrared temperature sensor on a breakout board. The MLX-90614 is wired to the appropriate i2c GPIO pins on the Raspberry Pi.

Raspberry Pi Pin -- MLX-90614 Pin
     3v3         ->     Vin
     (Any)GND    ->     GND
     GPIO2/SDA   ->     SDA
     GPIO3/SCL   ->     SCL

Later we'll us the SMBUS python package to get temperature readings from the MLX-90614.

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