Arduino UNO R4 WiFi doesnt detect GY-GPS6MV2

Official Hardware Classic UNO R4 WiFi
1

I bought the UNO R4 WiFi, all works fine, except the reception of data from the GPS Module. I put the pins on the right pins (3, 4) and when i execute the boolean gps.available() it always false.

void setup() {
  Serial.begin(9600);
  gps.begin(9600);
  iniciaLed();
  while (!Serial) {
    ;  // Esperar a que se establezca la conexión serial
  }

  // Conexión a la red WiFi
  while (status != WL_CONNECTED) {
    Serial.print("Conectando a la red WiFi...");
    status = WiFi.begin(ssid, pass);
    delay(5000);  // Esperar 5 segundos para volver a intentar la conexión
  }

  Serial.println("Conexión WiFi establecida");
}

void loop() {
  if (client.connect(server, 8080)) {  // Conexión al servidor en el puerto 8080 (HTTP)
    Serial.println("Conectado al servidor\n");
    if (gps.available())
    {
     String jsonp = "{\"funciono\": \"Funciono\", \"intento\": \"Good\"}";;
     hacerPeticion2(jsonp.length(), jsonp);
    } else {
      String jsonp = "{\"funciono\": \"NoFunciono\", \"intento\": \"Bad\"}";;
     hacerPeticion2(jsonp.length(), jsonp);
    }

This is my code. (A part of it, but is where the GPS send me that its not working.)

2

Welcome to the forum

Why do you think that they are the correct pins to use ? Where is the gps object defined ? Presumably by using SoftwareSerial but there is no need to use that.
Did you forget to post some of your sketch ?

The Uno R4 WiFi has two serial interfaces

Serial is used by the the USB connection for uploading code and the Serial monitor

Serial1 uses pins 0 and 1 and does not interfere with the Serial interface or vice versa

3 
#include <WiFiS3.h>
#include <ArduinoGraphics.h>
#include <Arduino_LED_Matrix.h>
#include <SoftwareSerial.h>

char ssid[] = "MIWIFI_6C34";      // Nombre de tu red WiFi
char pass[] = "hxtnxtuQ";  // Contraseña de tu red WiFi
int status = WL_IDLE_STATUS;

char server[] = "192.168.1.144";  // Dirección del servidor
WiFiClient client;
ArduinoLEDMatrix matrix;
SoftwareSerial gps(4,3);
char dato=' ';

void setup() {
  Serial.begin(9600);
  gps.begin(9600);
  iniciaLed();
  while (!Serial) {
    ;  // Esperar a que se establezca la conexión serial
  }

  // Conexión a la red WiFi
  while (status != WL_CONNECTED) {
    Serial.print("Conectando a la red WiFi...");
    status = WiFi.begin(ssid, pass);
    delay(5000);  // Esperar 5 segundos para volver a intentar la conexión
  }

  Serial.println("Conexión WiFi establecida");
}

void loop() {
  if (client.connect(server, 8080)) {  // Conexión al servidor en el puerto 8080 (HTTP)
    Serial.println("Conectado al servidor\n");
    if (gps.available())
    {
     String jsonp = "{\"funciono\": \"Funciono\", \"intento\": \"Good\"}";;
     hacerPeticion2(jsonp.length(), jsonp);
    } else {
      String jsonp = "{\"funciono\": \"NoFunciono\", \"intento\": \"Bad\"}";;
     hacerPeticion2(jsonp.length(), jsonp);
    }
    // Construir el cuerpo del JSON
    String json = "{\"nombre\": \"Camión1\", \"latitud\": 55.232, \"longitud\": 23.3232}";

    // Enviar la solicitud POST al servidor
    hacerPeticion(json.length(), json);
    textoLed("    PETICION 1    ");
    delay(5000);
    String json2 = "{\"nombre\": \"Camión2\", \"latitud\": 45.232, \"longitud\": 93.3232}";
    hacerPeticion(json2.length(), json2);
    textoLed("    PETICION 2    ");
    delay(5000);
  } else {
    Serial.println("Error al conectarse al servidor");
  }
  textoLed("    PAFERGONSL    ");
  delay(5000);  // Esperar 5 segundos antes de enviar otra solicitud
}

void hacerPeticion(int length, String json) {
  client.println("POST /api/gps/postPosition HTTP/1.1");
  client.println("Host: ");
  client.println("Content-Type: application/json");
  client.print("Content-Length: ");
  client.println(length);
  client.println();
  client.println(json);
}

void hacerPeticion2(int length, String json) {
  client.println("POST /api/gps/mapa HTTP/1.1");
  client.println("Host: ");
  client.println("Content-Type: application/json");
  client.print("Content-Length: ");
  client.println(length);
  client.println();
  client.println(json);
}

void iniciaLed() {
  matrix.begin();

  matrix.beginDraw();

  matrix.stroke(0xFFFFFFFF);
  matrix.textScrollSpeed(100);

  const char text[] = "  UNO r4  ";
  matrix.textFont(Font_4x6);
  matrix.beginText(0, 1, 0xFFFFFF);
  matrix.println(text);
  matrix.endText(SCROLL_LEFT);

  matrix.endDraw();
}

void textoLed(const char text[]) {
  matrix.beginDraw();

  matrix.stroke(0xFFFFFFFF);
  matrix.textScrollSpeed(50);

  matrix.textFont(Font_5x7);
  matrix.beginText(0, 1, 0xFFFFFF);
  matrix.println(text);
  matrix.endText(SCROLL_LEFT);

  matrix.endDraw();
}

This is my full sketch.
I think that the 3 and 4 pins are the corrects because in all sites that talk about it, the pins that they connect it is 3 and 4, and i thought that is that.

4

Forget about SoftwareSerial on the Uno R4

Connect the GPS to pins 0 and 1 and use Serial1 to read the data

5

Okey, i get the gps.available on true, but i dont get any data.

6

Post your sketch that uses Serial1

7

I do it on a new sketch:

void setup() {
  Serial.begin(9600);
  
  Serial1.begin(9600);
}

void loop() {
  if (Serial1.available()) {
    char c = Serial1.read();
    Serial.print(c);
  }

  if (Serial.available()) {
    char c = Serial.read();
    Serial1.print(c);
  }
}
8

Check that you have the Rx/Tx connections on pins 0 and 1 the right way round and delete the Serial.available() test and its associated code

Are you testing this indoors and has the GPS got a satellite lock ? This is usually indicated by a flashing LED on the GPS module

9

There is not any flashing LED and i try it in doors and outdoors. And yes, i check the Rx and Tx is well connected

10

How are you powering the GPS module and the Arduino itself ?

11

Module 3.3v and the Arduino USB

12

Probably the gps module is damaged?

13

How are you powering the project ?

14

The arduino is connected with a USB C to the computer.