Arduino GSM Module

[eabarladi]

Hi, guys. I’m building a fuel theft alert to send text messages to the owners phone using a gsm module.
The sensor that detects the fuel drop is the the arduino ultrasonic sensor.
In the arduino void loop i put an if function in there for when the fuel level drops to a certain value. The challenge is the fuel drops when the driver himself is dropping. Im wiring the device so it’s only activated when the ignition is turned off. I want the device to register the new fuel it comes on as the initial. Is there any code i can use.
i’ve tried saving the distance in another variable and adding a value to it in the id loop but that doesn’t work. Help please. i’m defending it on Monday

[hbar1st]

You may get more help if you post code instead of an image of code. (Also good to mention the coding language)

[eabarladi]

The coding language is arduino(C++) and also i posted an image instead of the code because i’m not close to my laptop now. I might forget when i get to it because i’ve been too busy lately.
I will add the code later. thanks

[ilenia]

you always have more chance to receiving help if you post your code, so that it can be copied and debugged

[eabarladi]

Hi, guys. I’m building a fuel theft alert to send text messages to the owners phone using a gsm module.
The sensor that detects the fuel drop is the the arduino ultrasonic sensor.
In the arduino void loop i put an if function in there for when the fuel level drops to a certain value. The challenge is the fuel drops when the driver himself is dropping. Im wiring the device so it’s only activated when the ignition is turned off. I want the device to register the new fuel it comes on as the initial. Is there any code i can use.
i’ve tried saving the distance in another variable and adding a value to it in the id loop but that doesn’t work. Help please. i’m defending it on Monday.
Made this post yesterday. this is my code

#include <SoftwareSerial.h> 
SoftwareSerial SIM900(7, 8); 
#include <NewPing.h> 
const int trigPin = 13; 
const int echoPin = 10; 
float duration, distance; 
#include <LiquidCrystal.h> 
LiquidCrystal lcd(12,11,5,4,3,2); 
 
void setup() 
 
{  
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 
  Serial.begin(19200); 
  SIM900.begin(19200); 
  delay(2000); 
  Serial.begin(19200); 
  Serial.print("Initializing..."); //setup for gsm shield 
  lcd.begin(16,2); 
  delay(2000); 
  lcd.print("Initializing..."); 
 
  delay(2000); 
  lcd.clear(); 
 
  delay(2000); 
  lcd.print("Assembling Parts..."); 
   
  delay(2000); 
  lcd.clear(); 
 
  delay(2000); 
  lcd.print("GSM Shield..."); 
 
  delay(2000); 
  lcd.clear(); 
 
 
  delay(2000); 
  lcd.print("Level Sensor..."); 
 
  delay(2000); 
  lcd.clear(); 
 
  delay(2000); 
  lcd.setCursor(0,1); 
  lcd.print("Welcome Joe!"); 
 
  delay(4500); 
  lcd.clear(); 
 
  lcd.setCursor(0,1); 
  lcd.print("STATUS:Safe"); 
   
} 
 
void loop() 
{ 
  digitalWrite(trigPin, LOW); 
  delayMicroseconds(2); 
  digitalWrite(trigPin, HIGH); 
  delayMicroseconds(10); 
  digitalWrite(trigPin, LOW); 
 
  duration = pulseIn(echoPin, HIGH); 
  distance = (duration*0.343)/2; 
 
   Serial.print("Distance: "); 
   Serial.print(distance); 
   Serial.print("cm"); 
   delay(2000);   
 
 
  if((distance>=50)&&(distance<=90 
  )) 
  { 
 
  
   lcd.setCursor(0,1); 
   lcd.print("Dist: "); 
   lcd.print(distance); 
   lcd.print("cm"); 
   delay(500); 
   lcd.setCursor(0,1); 
   lcd.print("STATUS: ALERT!!!!"); 
   delay(500); 
   lcd.clear(); 
    
    
    
   SIM900.println("ATD +233546368451;");  
   delay(10000); 
   SIM900.println(); 
   delay(1000); 
   SIM900.print("AT+CMGF=1\r");   
   delay(1000); 
   SIM900.println("AT+CMGS=\"+233546368451\"\r");  
   delay(1000); 
   SIM900.println("CHECK YOUR VEHICLE OR CALL AUTHORITIES");  
   delay(1000); 
   SIM900.println((char)26);  
   delay(1000); 
   SIM900.println(); 
   delay(5000); 
   Serial.println("SMS sent successfully"); 
   delay(1000); 
   Serial.print("Distance: "); 
   Serial.print(distance); 
   Serial.print("cm"); 
   delay(2000); 
 
   lcd.setCursor(0,1); 
   lcd.print("STATUS:Safe"); 
  } 
  else return; 
}

[hbar1st]

I merged your topics together as they are about the same thing. (In future please do not create new topics if you are just following up on something you already posted)