Hat Thermal is a human infrared thermal imaging device compatible with M5StickC. It is equipped with a built-in MLX90640 thermopile sensor that can measure the surface temperature of objects and generate thermal images (with a resolution of 32 x 24) based on the temperature gradient formed by the surface temperature. The MLX90640 infrared (IR) sensor array offers high resolution and the ability to work reliably in harsh environments. Compared to expensive high-end thermal imagers, Hat Thermal is a cost-effective alternative. Unlike typical microbolometers, this sensor does not require frequent recalibration, ensuring continuous detection and reducing system maintenance costs.