Lora Technology for Flood Monitoring and Warn System Tuti Sandhya, Madhu Shalini, Charan Kumar, Vaishnavi, Priyanka, D.S. Naga Malleswara Rao and Devendra Singh E3S Web Conf., 430 (2023) 01168 Published online: 06 October 2023 DOI: 10.1051/e3sconf/202343001168