Hi Pema,

From Brave Browser AI:

LoRa 1276 900T300D ESP32 library for Arduino IDE
To use LoRa 1276 900T300D ESP32 library for Arduino IDE, follow these steps:

1. Install the LoRa library for Arduino IDE, which supports Semtech SX1276/77/78/79 based boards/shields. You can find it on the Arduino Reference website [here].
2. After installing the library, you can use the example code provided by Renzo Mischianti in his tutorial on E32 LoRa (Long Range) device [here].

Here’s a simplified version of the code:

#include "Arduino.h"
#include "LoRa_E32.h"

// Update the pin numbers based on your ESP32 board's LoRa module connections
LoRa_E32 e32ttl100(2, 3); // RX, TX

void setup() {
  Serial.begin(9600);
  delay(500);
  Serial.println("Hi, I'm going to send message!");

  // Startup all pins and UART
  e32ttl100.begin();

  // Send message
  ResponseStatus rs = e32ttl100.sendMessage("Hello, world?");

  // Check If there is some problem of succesfully send
  Serial.println(rs.getResponseDescription());
}

void loop() {
  // If something available
  if (e32ttl100.available() > 1) {
    // read the String message
    ResponseContainer rc = e32ttl100.receiveMessage();

    // Is something goes wrong, print error
    if (rc.status.code != 1) {
      rc.status.getResponseDescription();
    }
  }
}

Make sure to update the pin numbers in the LoRa_E32 constructor (LoRa_E32 e32ttl100(2, 3);) based on your ESP32 board’s LoRa module connections.
Remember to connect the LoRa module to your ESP32 board according to the documentation provided in the tutorial or the manufacturer’s instructions.

Followed this article  when coding my project.  SPI, GPIO pins were found by using Rui Santos’s code for finding default SPI pins for CLK, MOSI, MISO, and SS.   Use care when using additional GPIO; there may produce unexpected results.

Recommend reading:  ESP32 Pinout Reference: Which GPIO pins should you use?

Might find helpful infomation from Renzo Mischianti’s Hackster.io Lora projects.

Regards,
William

Good Morning Pema,

Just watched Configure E32 LoRa Modules Over Serial Port on “YouTube”; Should find this more helpful that my first reply.

Regards,
William

Thanks for providing such a detailed answer, William.
I’m certain that this will help.
Regards,
Sara