Development of LoRa Communication System for Effective Transmission of Data from Underground Coal Mines

Underground coal mining is a challenging and hazardous occupation that requires constant monitoring of environmental parameters to ensure the safety miners. A handful research has been carried out in developing wireless devices monitor underground mine workings using Wi-Fi ZigBee, which limitations such as limited range, interference, reliability, power consumption, security. The main objective this study develop an Gas Monitoring Device LoRa communication for effective transmission monitored data. testing was model measure propagation signal with line sight non-line sight. It observed system performs fairly well both situations. During testing, it there drop RSSI at 14 m sight, beyond 17 no received. Hence, every 15 m, booster required be placed maintain efficient reliable signals. In event increase gas level threshold limit mine, developed actuates siren underground, boosters, on surface.