LCD 12C 16X2 LCM1602 IIC V1 Interface problems

[osama]

hello guys 

i'm working on sms based control electrical dvices using gsm sim900 project, when i include the ( lcd.begin (16,2)) the hole system stop

and i got nothing on serial monitor, so any one can help me on this and i'll i will appreciate that, here you are the skech

#include <SoftwareSerial.h>

#include <LiquidCrystal_I2C.h>

#include <Wire.h>

SoftwareSerial SIM900(7, ;

char incoming_char=0;

LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);

void setup()

{

  Serial.begin(19200); // for serial monitor

  SIM900.begin(19200); // for GSM shield

  SIM900power();  // turn on shield

  delay(25000);  // give time to log on to network.

  pinMode(10, OUTPUT);

   pinMode(11, OUTPUT);

    pinMode(12, OUTPUT);

 pinMode(13, OUTPUT);

  digitalWrite(10, LOW);

  digitalWrite(11, LOW);

  digitalWrite(12, LOW);

  digitalWrite(13, LOW);

   SIM900.print("AT+CMGF=1r");  // set SMS mode to text

  delay(1000);

  SIM900.print("AT+CNMI=2,2,0,0,0r"); 

   delay(1000);

}

void SIM900power()

// software equivalent of pressing the GSM shield "power" button

{

  digitalWrite(9, HIGH);

  delay(1000);

  digitalWrite(9, LOW);

  delay(7000);

}

void loop()

{

  // Now we simply display any text that the GSM shield sends out on the serial monitor

  if(SIM900.available() >0)

  {

    incoming_char=SIM900.read(); //Get the character from the cellular serial port.

    Serial.print(incoming_char); //Print the incoming character to the terminal.

    if (incoming_char=='a')

    {

      digitalWrite(10,HIGH);

       Serial.println(incoming_char);

      SIM900.println("AT+CMGD=1,4"); // delete all SMS

 

       }

       if (incoming_char=='b')

    {

      digitalWrite(11,HIGH);

       Serial.println(incoming_char);

      SIM900.println("AT+CMGD=1,4"); // delete all SMS

 

       }

        if (incoming_char=='c')

    {

      digitalWrite(12,HIGH);

       Serial.println(incoming_char);

      SIM900.println("AT+CMGD=1,4"); // delete all SMS

 

       }

      

        if (incoming_char=='d')

    {

      digitalWrite(13,HIGH);

       Serial.println(incoming_char);

      SIM900.println("AT+CMGD=1,4"); // delete all SMS

 

       }

        if (incoming_char=='e')

    {

      digitalWrite(10,LOW);

       Serial.println(incoming_char);

      SIM900.println("AT+CMGD=1,4"); // delete all SMS

 

       }

        if (incoming_char=='f')

    {

      digitalWrite(11, LOW);

       Serial.println(incoming_char);

      SIM900.println("AT+CMGD=1,4"); // delete all SMS

 

       }

  }

}

 

thank you all

[Hari Prasaath K]

Try working with the i2c lcd part first and once you make sure code is working, further you can integrate the code and check.

[Author]

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