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📡 Two Way Chat via LoRa device with ESP8266

We have used NodeMCU ESP8266 Microcontroller which is cheapest. You may also use ESP32 modules.

📽️ Demo

You can click on the below Image or this Youtube Link to see the demo. Please let me know in the comments, how do you feel about this Application.
LoRa-Chat

  1. LoRa-02 SX1278 : From Robu / From RoboCraze
  2. Node MCU ESP8266 : From Robu / From RoboCraze
  3. 433MHz Antenna:
    • UFL/IPEX type small Antenna from RoboCraze
    • SMA type Antenna for better range from Robu and you will need one SMA to IPEX/U.FL connector extra
  4. Female to Female Jumper Wires from Robu
  5. Micro USB Data Cable
  6. A computer with USB port

Important Requirements

  1. Install Arduino IDE 1.8.x from here and configure the preferances. You need to put https://arduino.esp8266.com/stable/package_esp8266com_index.json in preference window.

  2. Install below modules:

  3. Download and configure the ESP8266 Data Upload tool from here

  4. Connect your LoRa-02 SX1278 with ESP8266 with below diagram

LoRa Connection Diagram

ESP8266 Pins LoRa Pins
3V 3.3V
GND GND
D8 NSS
D7 MOSI
D6 MISO
D5 SCK
D0 RST
D2 DIO0
  1. Connect your ESP8266 with your computer and upload the data folder using the Upload Tool.
  2. Upload the respective programs in two different baords.
  3. Power the two devices up using 5v micro USB power. You can use mobile charger or power bank. This are low power devices, it can last long even on battery power.
  4. Connect with NodeMCU1 & NodeMCU2 WiFi SSIDs from two different devices using mobile / laptop or computer.
  5. Then open browser and type in 192.168.4.1 . Then simply chat with other device.

Code reference for this project

Check the complete code at GitHub