GSM sim900 Arduino mega2560

shiyar · December 22, 2018, 10:15pm

any help ? i have project laser security system with gsm sim900 and few sensores im using aruino mega2560 every thing i working normal but i gsm not sending sms to phone i dont know why!

this is my code

github.com

shiyaroo/gsm-sim900/blob/master/laser_security_system__gsm.ino

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <SoftwareSerial.h>

SoftwareSerial sim900(0,1);
String  TextForSMS;

int dataldr =0;
int sensorldr = A0;
int ldrState = LOW;            
int ldrthres = 900;

int pir = A1;
int pirState = LOW;            
int val = 0; 

int gas = A8;
int sensorgasThres = 400;

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GSM sim900 Arduino mega2560

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