Set Baudrate of Neo6M GPS Module on T-Beam

Projects Interfacing w/ Software on the Computer
1

i want to set the Baudrate of the Neo 6m GPS Modul to 115200 or a higher value. I'm building a time messurement system where it simply takes to long to recive the Nema sentence with the standart 9600 Baudrate.

I use this board: https://www.amazon.de/gp/product/B07VQGQRK6/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I did a scatch in the Arduino IDE and want to include it into my bigger project. Here is the Code i tryed to follow this instructions: NEO-6M Howto: change serial data rate via serial interface (boost from 9.6k to 115k) — for NEO-6, NEO-7, NEO-8 | by Victor | Medium

I also fount the manuel for the Neo 6m: ДКО Электронщик - все для работы и хобби электронщика на electronshik.ru

The problem is that in my case the GPS Modul is fixed on the board an i can't directly connect it to the PC. So there is no option of using the U-Center to config the GPS Modul.

This code won't work. I get no serial feedback at all.

Any Tips or links to a solution are welcome.


#include <SoftwareSerial.h>


void setup() {

  Serial.begin(115200);

  Serial1.begin(9600, SERIAL_8N1, 34, 12);   //default mode

  changeBaudrate();

  delay(100);

  Serial1.flush();

  Serial1.end();
  


}

void loop(){

    Serial1.begin(115200, SERIAL_8N1, 34, 12);   //new 115k boost mode

    Serial.println("try to send data with 115200");

    delay(1000);

    while(Serial1.available()){

    Serial.write(Serial1.read());

    Serial1.println();

    }

    Serial1.flush();

    Serial1.end();

    Serial1.begin(9600, SERIAL_8N1, 34, 12);   //new 115k boost mode

    Serial.println("try to send data with 9600");

    delay(1000);

    while(Serial1.available()) {

    Serial.write(Serial1.read());

    Serial1.println();

    }

    Serial1.flush();

    Serial1.end();

}

void changeBaudrate() {

    // CFG-PRT
    byte packet[] = {
        0xB5, // sync char 1
        0x62, // sync char 2
        0x06, // class
        0x00, // id
        0x14, // length
        0x00, // 
        0x01, // payload
        0x00, // payload
        0x00, // payload
        0x00, // payload
        0xD0, // payload
        0x08, // payload
        0x00, // payload
        0x00, // payload
        0x00, // payload
        0xC2, // payload
        0x01, // payload
        0x00, // payload
        0x07, // payload
        0x00, // payload
        0x03, // payload
        0x00, // payload
        0x00, // payload
        0x00, // payload
        0x00, // payload
        0x00, // payload
        
        0xC0, // CK_A
        0x7E, // CK_B
    };

    sendPacket(packet, sizeof(packet));

}

void sendPacket(byte *packet, byte len) {

    for (byte i = 0; i < len; i++)

    {
        Serial1.write(packet[i]);

        Serial.println("in Send Packet");

    }

}

I just get feedback if i set the connection to 9600 baudrate:

Serail Plot:

23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.245 -> in Send Packet
23:42:16.338 -> try to send data with 115200
23:42:17.368 -> try to send data with 9600
23:42:18.409 -> $GPRMC,,V,,,,,,,,,,N*53
23:42:18.409 -> $GPVTG,,,,,,,,,N*30
23:42:18.409 -> $GPGGA,,,,,,0,00,99.99,,,,,,*48
23:42:18.409 -> $GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30
23:42:18.501 -> $GPGSV,1,1,00*79
23:42:18.550 -> $GPGLL,,,,,,V,N*64
23:42:18.596 -> $GPTXT,01,01,00,rxbuf alloc port 1*51
23:42:18.829 -> try to send data with 115200
2

Why are you including SoftwareSerial.h? What Arduino processor are you using?

SoftwareSerial doesn't work well, or at all, for Baud rates higher than about 38,400.

Did you see this note? The market is flooded with counterfeit, semifunctional GPS modules.

Note 1: always test your device if it actually capable of 115k. NEO chip is still a chinese random especially when faked, and other schematic may differ between versions;

3

Given that, maybe try working your way up the plausible baud rates gradually.

4

hey,

I thought you would need to include softwareserial.h.... but seems to work fine without as well. As mentioned i'm using a TTGO T-Beam which has an esp32.

yeah i have seen this note but i don't really get it since i'm sending serial data to the neo modul and nothing changes. i can still connect with a 9600 Baudrate after it should be set to 1152000.

5

i get a connection just not with a higher baudrate than 9600 i can't set it to anything else

6

Sounds like you have a counterfeit GPS module. Try a genuine Neo6M, purchased from a reputable supplier.

7

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