Nerves Thermal Camera

This project is an Elixir Nerves firmware that implements a thermal camera using the Melexis MLX90640 sensor. It is tested on a Raspberry Pi Zero W, but it should work on other WiFi-enabled Raspberri Pi models too.

Other platforms supported by Nerves should work too, but may need modifications.

Build and installation

The pre-requisite is that you have installed the Elixir language, Nerves, and Node.js. You can find installation guides on their respective websites.

Then:

1. Clone or download the repository and open your terminal

2. cd into the project directory and set the following environment variables:

   export MIX_TARGET=rpi0 # (or another Nerves target like `rpi3`)
   export MIX_ENV=prod
   # In the following two commands, replace `your_ssid` with your WiFi SSID
   # and `your_psk` with your WiFi password
   export THERMALCAM_SSID=your_ssid
   export THERMALCAM_PSK=your_psk

   Optionally, you can also set these environment variables: THERMALCAM_NET_REG_DOMAIN for the regulatory domain of the network (default to DE), and THERMALCAM_KEY_MGMT for the key management (default to wpa_psk).

3. Run make firmware to build the firmware

4. Insert the SD card in your computer and, from the same terminal window as before, run make firmware.burn to burn the firmware on the SD card.

The SD card should now be ready.

Usage

1. Follow the instructions above to burn a firmware image on the SD card
2. Wire the MLX90640 to the Raspberry Pi
3. Turn on the Raspberry Pi and wait for it to connect to the WiFi network
4. From another device (computer or smartphone) connected to the same WiFi, visit http://thermalcam.local