A LoRa-enabled Personal Dust Sampler for Opencast Mine Workers

This project presents a LoRa-enabled Personal Dust Sampler designed specifically for opencast mine workers to monitor hazardous environmental conditions in real-time. The system consists of a transmitter unit equipped with a DHT11 sensor for temperature and humidity, an MQ2 sensor for flammable gases, and an MQ135 sensor for air quality and dust concentration. These sensors are interfaced with an Arduino microcontroller, which processes the data and displays real-time readings on an LCD screen. The data is then wirelessly transmitted via a LoRa module to a remote receiver unit. On the receiver side, another Arduino is connected to a LoRa receiver, a GSM module, and a buzzer. If any measured parameter exceeds predefined safety thresholds, the system triggers an audible alert through the buzzer and sends an SMS notification via the GSM module to designated personnel. This ensures timely awareness and intervention, enhancing occupational safety for mine workers exposed to harmful atmospheric conditions.