Arduino Uno: Microcontroller board for processing sensor data Ultrasonic Sensor (HC-SR04): To detect the distance to obstacles Buzzer: Audio alert for proximity warnings LED: Visual alert for ...

An Arduino Uno (CH340G clone) reads temperature and humidity from a DHT11 sensor and computes 10+ environmental metrics (heat index, dew point, enthalpy, humidex, vapor pressures, etc.), outputting ...