Offline Messenger

A communication system that lets users exchange messages via a browser-based chat interface, while using LoRa (Long Range radio) for actual data transmission.

Built with React.js on the frontend and an ESP32-based Heltec LoRa board running Arduino firmware, this project enables messaging between devices in offline or no-infrastructure environments.

---

How It Works

1. Compose & Send Message: The user types a message in the browser, which is handled by the ChatInterface component and sent to the connected LoRa device.
2. Transmit via LoRa: ESP32 Heltec board sends the message wirelessly using LoRa to another device.
3. Receive + Display: Incoming messages are received via LoRa and displayed in the same browser UI.

---

Tech Stack

• Frontend: React
• Microcontroller: Heltec WiFi LoRa 32 (ESP32 + SX1276)
• Firmware: Arduino (C++)

---

Use Case

• Communication in remote or disaster-hit areas with no internet