No AT commands with SIM800L GPS

Projects Networking, Protocols, and Devices
1

I have a trouble with sim800l gps module. First of all i'm using a Lithium Polymer Batery to power the sim800l module.
I connect VCC to baterry's (+) and module's GND to battery's (-). I also connect module's RX to Digital pin 10 and TX to 11.

Using the code below i olny get the message "Initializing..."

Any ideas?

Thank you!

#include <SoftwareSerial.h>

//Create software serial object to communicate with SIM800L
SoftwareSerial mySerial(10, 11); 

void setup()
{
  //Begin serial communication with Arduino and Arduino IDE (Serial Monitor)
  Serial.begin(9600);

  //Begin serial communication with Arduino and SIM800L
  mySerial.begin(9600);

  Serial.println("Initializing...");
  delay(1000);

  mySerial.println("AT"); //Once the handshake test is successful, it will back to OK
  updateSerial();
  mySerial.println("AT+CSQ"); //Signal quality test, value range is 0-31 , 31 is the best
  updateSerial();
  mySerial.println("AT+CCID"); //Read SIM information to confirm whether the SIM is plugged
  updateSerial();
  mySerial.println("AT+CREG?"); //Check whether it has registered in the network
  updateSerial();
}

void loop()
{
  updateSerial();
}

void updateSerial()
{
  delay(500);
  while (Serial.available())
  {
    mySerial.write(Serial.read());//Forward what Serial received to Software Serial Port
  }
  while (mySerial.available())
  {
    Serial.write(mySerial.read());//Forward what Software Serial received to Serial Port
  }
}
2

swap pins connection ie: rx of sim800 should go to pin 11 and tx to pin 10

3

It works! Thank you very much!