float vout = 0.0;
float vin = 0.0;
float R1 = 997000.0; // resistance of R1 (100K) -see text!
float R2 = 98500.0;



void setup() {

  Serial.begin(9600);
lcd.setcursor(0;0);
lcd.print("Ubat ")
}

void loop() {

  float value = analogRead(A0);


vout = (value * 5.0) / 1024.0;
vin = vout / (R2/(R1+R2));


Serial.println(vin);

vin = vin * 10;
Vin = map(vin, 210, 294 , 0, 100);


lcd.setcursor(0,5);
lcd.print(vin);

}