Arduino GSM SIM800L

Projects Networking, Protocols, and Devices
1

Hi, everyone)
I had problems using the SIM800L.h library. I connected the module correctly. The existing example works well.

#include <Sim800l.h>
#include <SoftwareSerial.h>
Sim800l Sim800l;
char text[]="hello";
char number[]="xxxxxxxxxxxx";
bool s;

void setup(){
Sim800l.begin();
s=Sim800l.sendSms(number,text);
}
void loop(){}

But in my project 2 more modules need UART. Here are the parts of the code that are important.

#include <OneWire.h>
#include <SoftwareSerial.h>
#include "VoiceRecognitionV3.h"
#include <DFPlayer_Mini_Mp3.h>
#include <Sim800l.h>
Sim800l Sim800l;

VR myVR(2,3);

char text[]="Hi";
char number[]="xxxxxxxxxx";
bool s;

void setup()
{
Sim800l.begin();
myVR.begin(9600);
Serial.begin (9600);

s=Sim800l.sendSms(number,text);
}

Without GSM everything works because the first module is connected to 0 1 pins by default. And the 2nd module is initialized to 2 and 3 pins.

I think the problem is in UART, but I can't solve it.
Maybe you can help me?

Thank you very much.

2

But in my project 2 more modules need UART.

Use a Mega or another Arduino with multiple hardware serial ports.

You can not run multiple instances of software serial unless you take care to not have them running at the same time. You are far better off taking your project to a different Arduino.