• Sale Narayana Indraja
• G.Ramesh
• T.Sumanjali
• M.Indravathi

This project presents the development of an embedded system designed to enable message transmission from network-restricted areas, commonly known as black spots, using LoRa and GSM technologies. Black spots are regions where conventional mobile network signals are unavailable, often encountered in remote locations or signal-blocked environments such as military zones or secure buildings. The proposed system employs two embedded modules: one placed in the black spot and the other in an area with network coverage. The black spot module uses Bluetooth to receive the message and transmits it via LoRa to the second module. The receiving module then forwards the message as an SMS through the GSM network. Operating at distinct frequencies—LoRa (2.4 GHz) and GSM (1800 MHz)—this system facilitates reliable communication in areas where traditional methods fail, offering a robust solution for security-sensitive and undercover operations.

LoRa (Long Range) Communication, Black Spot Connectivity, GSM Module, Arduino UNO, Bluetooth Module, Wireless Data Transmission, Embedded Systems, Signal-Jammed Area Communication, Rural and Remote Communication, Low Power Wide Area Network (LPWAN), IoT-based Messaging, Dual-Module Communication Architecture, Emergency Communication System, Secure Message Delivery, Automation in Network-Deprived Zones.

"Communication in Black Spots Using Lora.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 5, page no.a386-a389, May-2025, Available :http://www.jetir.org/papers/JETIR2505038.pdf

"Communication in Black Spots Using Lora.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 5, page no. ppa386-a389, May-2025, Available at : http://www.jetir.org/papers/JETIR2505038.pdf