Using ARDUINO mega2560 TO SIM800L SMS not reciving only full in hardware

Projects Networking, Protocols, and Devices
1

Using ARDUINO mega2560 TO SIM800L SMS reciving only 12 char only i don"t know why please help me to figure out

Connection sim800l RX to mega TX1 And TX to RX1 mega ,sim800l vcc to arduino 5v and grnd to grnd

//#include <SoftwareSerial.h>

//Create software serial object to communicate with SIM800L
//SoftwareSerial Serial1(3, 2); //SIM800L Tx & Rx is connected to Arduino #3 & #2

void setup()
{
  //Begin serial communication with Arduino and Arduino IDE (Serial Monitor)
  Serial.begin(9600);
  
  //Begin serial communication with Arduino and SIM800L
  Serial1.begin(9600);

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

  Serial1.println("AT"); //Once the handshake test is successful, it will back to OK
  updateSerial();
  
  Serial1.println("AT+CMGF=1"); // Configuring TEXT mode
  updateSerial();
  //Serial1.println("AT+CMGR=1"); // Configuring TEXT mode
  //updateSerial();
  Serial1.println("AT+CNMI=1,2,0,0,0"); // Decides how newly arrived SMS messages should be handled
  updateSerial();
  Serial1.println("AT+CBC"); // Battery
  updateSerial();
}

void loop()
{
  updateSerial();
}

void updateSerial()
{
  
  delay(500);
  while (Serial.available()> 0) 
  {
    Serial1.write(Serial.read());//Forward what Serial received to Software Serial Port
  }
  while(Serial1.available()> 0) 
  {
    Serial.write(Serial1.read());//Forward what Software Serial received to Serial Port
  }
}

I SENT FOR 123456789012345 BUT I RECEIVE 123456789012
OUTPUT
18:04:49.325 -> Initializing...
18:04:50.862 ->
18:04:50.862 -> OK
18:04:51.327 ->
18:04:51.327 -> OK
18:04:51.839 ->
18:04:51.839 -> OK
18:04:52.352 ->
18:04:52.352 -> +CBC: 0,100,4734
18:04:52.352 ->
18:04:52.352 -> OK
18:04:52.352 ->
18:04:52.352 ->123456789012
Thanking you

pert 2

I moved your topic to an appropriate forum category @ashwin21.

In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.

This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.

Thanks in advance for your cooperation.

3

I suggest taking the delay out of your loop.
Just me...

Edit:...out of updateSerial.

4

thank you so much suferTim