Reyax RYS8830 GPS/GNSS Receiver Module EVB not working

[joaquinegn]

Hi,
I have been working on a little project and I am stucked on this since some weeks ago, i am very newbie on it, could you help me out? I want to get the gps data using RYS8830 EVB but I am getting "No GPS detected: check wiring." always, both devices connected to usb laptop. Using the software I could see the location very accurate.

Devices list:
1) ESP32 DEV KIT v1
2) Reyax RYS8830 GPS/GNSS Receiver Module EVB
3) 8-channel Bi-directional Logic Level Converter - TXB0108 (3.3v - 1.8v)


My wired is the following (jumper activaded on UART protocol on GPS EVB):

20231010_233740.jpg (1.99 MiB) Viewed 3162 times

Based on the documentarion I have used the RX,TX,Ground and 1.8V output as following:

diagram.png (47.28 KiB) Viewed 3162 times

EVB RX -> ESP32 TX
EVB TX -> ESP32 RX
The code is:

Code: Select all

#include <TinyGPSPlus.h>

const int rx = 16; 
const int tx = 17;
static const uint32_t serialBaud = 115200;

// The TinyGPSPlus object
TinyGPSPlus gps;


String incoming = "";

void setup()
{
  Serial.begin(serialBaud);
  Serial2.begin(serialBaud, SERIAL_8N1, rx, tx);

  delay(1000);

  writeDataToGPS("@GSTP");
  delay(100);
  writeDataToGPS("@GNS 47");
  delay(100);
  writeDataToGPS("@GSR");
  delay(100);
  Serial.println("SETUP");  
}

void loop()
{
  // This sketch displays information every time a new sentence is correctly encoded.
  while (Serial2.available() > 0) {
    if (Serial.println(Serial2.read())) {
      Serial.println(F("GPS detected."));
      displayInfo();
    }
  }

  if (millis() > 5000 && gps.charsProcessed() < 10)
  {
    Serial.println(F("No GPS detected: check wiring."));
    while(true);
  }
}

void writeDataToGPS(String data) 
{
  String content = "";
  content = data + "\r\n";
  char* bufc = (char*) malloc(sizeof(char) * content.length() + 1);
  content.toCharArray(bufc, content.length() + 1);
  Serial2.write(bufc);
  free(bufc);
}

void displayInfo()
{
  if (gps.location.isValid())
  {
    char data[20];
    sprintf(data, "%lf,%lf|", gps.location.lat(), gps.location.lng());
    Serial.println(gps.location.lat());
    Serial.write(data);
    Serial.flush();
    delay(100);
  }
}

Usingthe vendor software:

Captura de pantalla 2023-10-10 235502.png (7.05 KiB) Viewed 3162 times

Thank you in advanced!!