E220 LoRa device: how to make 3 devices communicate together

[Guyome41]

Hello, I bought 2 E220-900T30D modules and after two days I can’t just display a message! I use the tutorial on this page with the code from the library. When a module sends a message the led of the other arduino nano flashes
As the two LEDs of the two modules flash together I imagine that a transmission is well done.
but no message on the terminal! I just want to communicate 3 modules together and it looks way too complicated with your library! But I can’t find anything else…

Ebyte LoRa E22 device for Arduino, esp32 or esp8266: specs and basic use – 1

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/*
 * LoRa E22
 * Write on serial to transfer a message to other device
 * http://mischianti.org
 *
 * E22        ----- Arduino UNO
 * M0         ----- GND
 * M1         ----- GND
 * TX         ----- PIN 2 (PullUP)
 * RX         ----- PIN 3 (PullUP & Voltage divider)
 * AUX        ----- Not connected
 * VCC        ----- 3.3v/5v
 * GND        ----- GND
 *
 */
#include "Arduino.h"
#include "LoRa_E22.h"
 
LoRa_E22 e22ttl(3, 2); // Arduino RX --> e22 TX - Arduino TX --> e22 RX
 
void setup() {
  Serial.begin(9600);
  delay(500);
 
  Serial.println("Hi, I'm going to send message!");
 
  // Startup all pins and UART
  e22ttl.begin();

 
  // Send message
  ResponseStatus rs = e22ttl.sendMessage("Hello, world?");
  // Check If there is some problem of successfully send
  Serial.println(rs.getResponseDescription());
}
 
void loop() {
    // If something available
  if (e22ttl.available()>1) {
      // read the String message
    ResponseContainer rc = e22ttl.receiveMessage();
    // Is something goes wrong print error
    if (rc.status.code!=1){
        rc.status.getResponseDescription();
    }else{
        // Print the data received
        Serial.println(rc.data);
    }
  }
  if (Serial.available()) {
      String input = Serial.readString();
      e22ttl.sendMessage(input);
  }
}

TERMINAL MESSAGE :
18:11:56.347 -> Hi, I’m going to send message!
18:11:56.648 -> Success
18:12:36.746 -> Hi, I’m going to send message!
18:12:37.047 -> Success
18:12:58.972 -> Hi, I’m going to send message!
18:12:59.273 -> Success

The code without your library on the first tutorial is very understandable but does not display any message either. Can I use this module without your library and thus modify and read the parameters: power, speed, channel, frequency with simply UART commands?

[Renzo Mischianti]

Hi Guyome,
the code is correct, if you don’t receive the messages probably It’s a wiring problem or a configuration problem.

Connect the AUX pin also, to have the feedback.

And yes you can do all without my library directly with UART commands.

Bye Renzo

[Author]

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