Error in connecting in serial mode

[a-3isa]

i am getting this

when i am try to connect to gps02-ubx using esp32c3

`#include "HardwareSerial.h"
#include <SparkFun_u-blox_GNSS_v3.h> //http://librarymanager/All#SparkFun_u-blox_GNSS_v3
SFE_UBLOX_GNSS myGNSS;

HardwareSerial mySerial(1);

long lastTime = 0; //Simple local timer. Limits amount if I2C traffic to u-blox module.

struct gps_readings {
long lat, lon, alt;
};

void gps_init() {
Serial.println("GPS initializing....");

do {
Serial.println("GNSS: trying 38400 baud");

mySerial.begin(38400, SERIAL_8N1, RX1_PIN, TX1_PIN);

myGNSS.enableDebugging();  // Uncomment this line to enable helpful debug messages on Serial
myGNSS.connectedToUART2();  // This tells the library we are connecting to UART2 so it uses the correct configuration keys

if (myGNSS.begin(mySerial) == true) break;

delay(100);
Serial.println("GNSS: trying 9600 baud");
mySerial.begin(9600, SERIAL_8N1, RX1_PIN, TX1_PIN);
if (myGNSS.begin(mySerial) == true) {
  Serial.println("GNSS: connected at 9600 baud, switching to 38400");
  myGNSS.setSerialRate(38400);
  delay(100);
} else {
  //myGNSS.factoryDefault();
  delay(2000);  //Wait a bit before trying again to limit the Serial output
}

} while (1);
// Serial.println("GNSS serial connected");
Serial.println("The GPS is successfully initialized.");
Serial.println("================================================");

myGNSS.setUART1Output(COM_TYPE_UBX); //Set the UART port to output UBX only
myGNSS.saveConfiguration(); //Save the current settings to flash and BBR
}
`

[PaulZC]

Hi @a-3isa ,

In your code, you are trying to use Serial to communicate with the gps02-ubx module on UART2 (myGNSS.connectedToUART2();). But I think the gps02-ubx module does not provide access to UART2, only UART1?

In your screenshot, I think you are using I2C to communicate with the gps02-ubx module? This does not match your code.

To help you further, we need to see a schematic and a photo of how you have connected the gps02-ubx module to the ESP32.

Best wishes,
Paul

[PaulZC]

Closing... Please reopen if you need more help with this.