S.JayaChitra1, S.Kavin, S.Sasi and R.Sethupathi 2022. IOT based coal mine workers safety monitoring and alerting system. International Journal of Intellectual Advancements and Research in Engineering Computations. 10, 2 (Jun. 2022), 188–191. DOI:https://doi.org/10.61096/ijiarec.v10.iss2.2022.188-191.