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 appreciate that, here you are the sketch
#include <SoftwareSerial.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
SoftwareSerial SIM900(7, 8);
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=1\r"); // set SMS mode to text
delay(1000);
SIM900.print("AT+CNMI=2,2,0,0,0\r");
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