ESP32 Web + LoRa Demo with OTA & Multi-Device Support

ESP32 Web + LoRa Demo with OTA & Multi-Device Support. This project demonstrates a web interface for ESP32 devices with LoRa communication, Over-the-Air (OTA) updates, and multi-device messaging capabilities. It supports both WiFi and Ethernet for flexible connectivity.

Table of Contents

• Features
• Hardware Requirements
• Software Requirements
• Installation
• Configuration
• Usage
• Web Interface
• OTA Updates
• Troubleshooting
• Contributing
• License

Features

• Web Interface: User-friendly interface to send messages, view logs, and configure settings.

  

• LoRa Communication: Send and receive messages between two devices using LoRa technology.

  

• OTA Updates: Over-the-air firmware updates using ArduinoOTA.

• Logging: System, HTTP, and LoRa logs stored with timestamps.

• Persistent Settings: Device settings stored using Preferences library.

  

• Ethernet and Wi-Fi Support: Connect via Ethernet (PoE) or Wi-Fi.

Hardware Requirements

• 2 x Olimex ESP32-POE-ISO boards

• 2 x Olimex LoRa915 modules

• Jumper wires or UEXT connectors to connect the LoRa modules to the ESP32 boards

• Power (PoE or USB)

  

Software Requirements

• Arduino IDE or PlatformIO
• ESP32 Board Support Package
• Dependencies:
  • WiFi.h
  • ETH.h
  • AsyncTCP.h
  • ESPAsyncWebServer.h
  • WiFiUdp.h
  • ArduinoOTA.h
  • NTPClient.h
  • SPI.h
  • LoRa.h
  • deque
  • time.h
  • LittleFS.h
  • Preferences.h
  • ArduinoJson.h

Installation

1. Clone the Repository

git clone https://github.com/marksowell/esp32-web-lora-demo-ota-multi-device.git

2. Install Dependencies

PlatformIO

Dependencies are specified in the platformio.ini file.

Arduino IDE

Use the Library Manager to install the required libraries.

3. Hardware Setup

Connections

• Connect the LoRa915 module to the ESP32-POE-ISO via UEXT connector or jumper wires.

• Pin connections:

  LoRa915 Module	ESP32-POE-ISO
  MISO	GPIO 19
  MOSI	GPIO 23
  SCK	GPIO 18
  SS	GPIO 5
  RST	GPIO 14
  DIO0	GPIO 26
  3.3V	3.3V
  GND	GND

Antenna

• Ensure that an appropriate antenna is connected to the LoRa915 module.

4. Flash the Firmware

• Open the project in your development environment.

• Update Wi-Fi credentials in main.cpp:

  const char* ssid = "Your_SSID";
  const char* password = "Your_Password";
  

• Compile and upload the firmware to both ESP32 devices.

Configuration

Device Settings

• Device Number: Unique identifier for the device.
• Site ID: Identifier to match messages between devices (default is default_site).
• Logging Settings: Enable or disable system, HTTP, and LoRa logs.

Accessing the Web Interface

• Connect to the ESP32 device via its IP address (displayed in Serial Monitor).
• The web interface allows you to:
  • Send LoRa messages.
  • View connection and system logs.
  • Check system status.
  • Update device settings.
  • Reboot the device.

Usage

Sending a LoRa Message

1. Access the web interface of Device A.
2. Navigate to the Home page.
3. Enter a custom message or use the test message.
4. Click Send.

Receiving a LoRa Message

• Device B will automatically receive messages sent from Device A if the siteID matches.
• Received messages are displayed via a pop-up on the web interface and logged in the system logs.

Web Interface

The web interface is designed for ease of use:

• Home: Send LoRa messages.
• Logs: View system, HTTP, and LoRa logs.
• Status: Check device uptime, free memory, signal strength, and other system information.
• Settings: Update device number, site ID, and logging preferences.
• Reboot: Soft-reboot the device.

OTA Updates

• OTA updates are enabled via ArduinoOTA.
• To upload a new firmware:
  • Use the Arduino IDE or PlatformIO's OTA upload feature.
  • The device will log OTA progress and reboot upon completion.

Troubleshooting

LoRa Initialization Failed

• Check hardware connections.
• Ensure the correct frequency (915E6) is set for the LoRa module.
• Verify that the LoRa module is receiving sufficient power.

Messages Not Being Received

• Confirm both devices have the same siteID.
• Ensure devices are within range and antennas are connected.
• Adjust LoRa parameters (spreading factor, bandwidth) if necessary.

Web Interface Not Accessible

• Verify the device's IP address via the Serial Monitor.
• Ensure the device is connected to the network.
• Check firewall settings that may block access.

Contributing

Contributions are welcome! Please open an issue or submit a pull request for any improvements or bug fixes.

Guidelines

• Follow the existing code style.
• Include comments and documentation where appropriate.
• Test changes thoroughly on actual hardware.

License

This project is licensed under the MIT License. See the LICENSE file for details.