Upload the Arduino program onto the board ========================================= To ensure that your beautiful instrument is more than just an empty box, you must offer it a bit of intelligence. To do so, let's upload the Arduino program onto the board! I'm not going to detail the exact procedure to follow, many ressources do. Just some hints: 1. Install `the Arduino IDE `_; 2. Install the `Sparkfun Arduino library for the MLX90614 infrared thermometer `_; 3. Configure the Arduino IDE in order to communicate with your board (select **Arduino Nano** board and **ATmega328p (Old Bootloader)** processor on the used serial port); 4. Open the `Arduino program for ClorSensoud `_ available on project Gitea; 5. Upload the program onto the board.