Arduino ilə dəyişən gərginliyin müşahidəsi, aşırı gərginlik, normal gərginlik və aşağı gərginlik

#include <LiquidCrystal.h>

#define rs 9 
#define en 8 
#define d4 7 
#define d5 6  
#define d6 5 
#define d7 4 
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);



String TextForSms ;

// FOR THE VOLTAGE SENSOR
  float correctionfactor = 26; // 77
int analogInput = A1; 
float vout = 0; 
int vin = 0; 

// if we add 428k ohm resistor in series with the module 
// we can monitor the line voltage upto 310.048 

float R1 = 30000 + 428000;  // these are the 30k and 428k resistors   
float R2 = 7500; // 7.5 k 
int value = 0; 

void setup() {
  Serial.begin(9600); 
    // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("Voltage:");
  pinMode(analogInput, INPUT);

}

void loop() {
 
 
Voltage(); 

}

void Voltage()
{
   // read the value at analog input 
   value = analogRead(analogInput); 
   vout = (value * 5.0) / 1023.0; // see text 
   vin = vout / (R2/(R1+R2));

    vin = vin + correctionfactor; 
    
//Serial.print("INPUT V= "); 
//Serial.println(vin); 
delay(500); 
lcd.setCursor(10,0); 
lcd.print(vin);

if ( (vin > 0)  &&  (vin < 150) ) 
{
 lcd.setCursor(0,1);
lcd.print("Under Voltage"); 
}

if ( (vin >= 150)  &&  (vin <= 190) ) 
{
 lcd.setCursor(0,1);
lcd.print("Normal Voltage "); 
}

if ( vin > 190 ) 
{
 lcd.setCursor(0,1);
lcd.print("Over Voltage   "); 
}
}