LCD 12C 16X2 LCM1602 IIC V1 Interface problems with arduino

[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

 

 

 

[Vara Ashishkumar]

Hye osama,

You declared same pin (Pin No: 7 ) for software serial's RX pin and LCD's D7 pin. So it was happended.

Change any one of the pin from software serial pin or lcd pin.

Correct once and run it. It should be work.

 

[Author]

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