Rak3244 with rak4260. how to communicate gps to rak3244 board

LPWAN Modules / EVBs
1

Hello, happyHolidays everyone.
I have my Rak3244 board that inside it has the rak4260.
I have a gps that I want to send data to this board and print it on the arduino’s monitorerial.
I have not been able to send the GPS data to the board because the SoftwareSerial library does not support the 32mhz speed of the microcontroller. Is there a code to send the data and display it on the screen? Or just a SoftwareSerial library that works for me?

32mhz
32mhz1291×206 23.9 KB

Finally, thank you again and I look forward to your answer.

2

Hello @Andres.ferrarid
Welcome to the forum.
Not sure why you want to use SoftwareSerial. The RA3244 has a hardware serial available on the pin headers.

image
image690×535 46.8 KB

Did you try to connect the GPS to the RX and TX pins of the RAK3244 and then use Serial1 to communicate with the GPS module.

3

Hi @beegee I really appreciate your response and concern.

Regarding the code, I have been guided by the examples of the Tiny GPS library and they all take up SoftwareSerial.
I add photo of my code.

codigo gps
codigo gps394×684 73.3 KB

I also leave it written.

////////////////////////
#include <SoftwareSerial.h>
#include <TinyGPS.h>
TinyGPS gps;
SoftwareSerial serialgps(14,15);
unsigned long chars;
unsigned short sentences, failed_checksum;

void setup()
{
Serial.begin(115200);
serialgps.begin(14, 15);

//Imprimimos en el monitor serial:
Serial.println("");
Serial.println(“gps sim68”);
Serial.println(“Buscando senal”);
Serial.println("");
}

void loop()

{
while(Serial1.available()){
int c = Serial1.read();

if(gps.encode(c)) {
 float latitude, longitude;
 gps.f_get_position(&latitude, &longitude);
 Serial.print("Latitud/Longitud: "); 
 Serial.println(latitude,5); 
 Serial.println(", "); 
 Serial.println(longitude,5);
 Serial.println();
 gps.stats(&chars, &sentences, &failed_checksum);

}
///////////////////////////////

finally thank you again and I await your reply.

4

The examples are using SoftwareSerial because a lot of Arduino AVR boards have only one HW Serial.

As I said, replace the SoftwareSerial with Serial1 and connect your GPS to the RX/TX pins as I advised.

I didn’t work with the SoftwareSerial since a long time, but I do not see where you set the baud rate.

Try this with the GPS connected to RX and TX

RAK3244 GPS
TX RX
RX TX

Code:

#include <TinyGPS.h>
TinyGPS gps;

unsigned long chars;
unsigned short sentences, failed_checksum;

void setup()
{
	Serial.begin(115200);
	Serial1.begin(9600);

	//Imprimimos en el monitor serial:
	Serial.println("");
	Serial.println(“gps sim68”);
	Serial.println(“Buscando senal”);
	Serial.println("");
}

void loop()
{
	while (Serial1.available())
	{
		int c = Serial1.read();

		if (gps.encode(c))
		{
			float latitude, longitude;
			gps.f_get_position(&latitude, &longitude);
			Serial.print("Latitud/Longitud: ");
			Serial.println(latitude, 5);
			Serial.println(", ");
			Serial.println(longitude, 5);
			Serial.println();
			gps.stats(&chars, &sentences, &failed_checksum);
		}
}
5

Dear @beegee .

I really appreciate your prompt reply.
This is for my college degree. Right now I’m at work and here I can only compile because the board is at my house. While at home I will immediately enter the code to see what happens.

Thank you very much again!

6

Dear @beegee.
I did the test and the code did compile but it does not show me anything on the serial monitor.

code
code1390×740 66.4 KB

7

What is the baudrate of the GPS module? I assumed 9600, but it could be different.

Another point is the RX/TX lines. Sometimes the GPS breakouts have the names switched. You can try

RAK3244 GPS
RX RX
TX TX
8

the gps is the SIM68M and it has a speed of 115200, I changed it right away but it still doesn’t send me data. It is as if the entrances of the plate were closed. I test it on arduino UNO and if it gives me data the gps.

conexion
conexion724×674 113 KB

9

As I do not have this GPS module it is difficult to find the problem.

Did you try to switch the RX and TX lines?