This repository contains an example of a LoRa node program designed for the ESP32 platform. The program reads the DHT22 temperature and humidity, the battery level and water consumption via reed switch, packages the data into a JSON format, and sends it over LoRa.

Features:

Uses an SX12XX LoRa module.
Displays packet sending status, counter and battery level data on an SSD1306 OLED display.
Sends the ESP32's MAC address as the node ID.
Sends temperature data in Celsius.

Hardware Requirements:

ESP32 development board.
SX12XX LoRa module.
SSD1306 OLED display.

Pin Configuration: (Lilygo LoRa32 V2.1_1.6)

SCK - GPIO5
MISO - GPIO19
MOSI - GPIO27
SS - GPIO18
RST - GPIO23
DI0 - GPIO26

Setup:

Hardware Setup:

Connect the SX1278 LoRa module and the SSD1306 OLED display to the ESP32 according to the pin configuration. Ensure that the OLED display is powered correctly.

Software Setup:

Clone this repository.
Open the provided node program with PlatformIO
Upload the program to your ESP32.

Usage:

Power on the ESP32. The OLED display will show the status of the packet being sent and the current temperature reading. The built-in LED on the ESP32 will blink once every time a packet is sent. Monitor the serial output (at 115200 baud rate) to see the JSON formatted data being sent.

If you use arduino load ino file.

Data Format:

The data is sent in the following JSON format:

{
  "model": "ESP32CNT",
  "id": "ESP32_MAC_ADDRESS",
  "count": "COUNTER_IN_LITER",
  "tempc": "TEMPERATURE_IN_CELSIUS",
  "hum": "HUMIDITY_IN_PERCENTAGE",
  "batt": "BATTERY_IN_PERCENTAGE"
}

Troubleshooting:

LoRa Initialization Failed: Ensure that the SX1278 LoRa module is connected correctly and powered on. OLED Display Not Working: Check the connections and ensure that the display is powered correctly. No Temperature Data: Ensure that the ESP32's internal temperature sensor is functional. Contributing: Feel free to contribute to this example by opening issues or submitting pull requests. Any feedback or improvements are welcome!

I hope this README helps users understand and use your program! Adjustments can be made as necessary to fit any additional details or changes.