Voltage Sensor stopped giving out values after few hours

Other Hardware Sensors
1

Hello, i am working on power monitoring project. I am using this voltage sensor with arrduino UNO https://www.electronicshub.org/wp-content/uploads/2018/07/Interfacing-Voltage-Sensor-with-Arduino-Voltage-Sensor-Pins.jpg

and my code is

int Button = 2;
int buttonstate;
int analogInput = A1;
float vout = 0.0;
float vin = 0.0;
float R1 = 30000.0; //
float R2 = 7500.0; //
int value = 0;
void setup(){
pinMode(analogInput, INPUT);
pinMode(Button, INPUT);
Serial.begin(9600);
Serial.print("DC VOLTMETER");
}
void loop(){
// read the value at analog input
value = analogRead(analogInput);
vout = (value * 5.0) / 1024.0; // see text
vin = vout / (R2/(R1+R2));

Serial.print("INPUT V= ");
Serial.println(vin,2);
delay(100);
buttonstate = digitalRead(Button);
Serial.println(buttonstate);
}

everything works fine, i am getting perfect value on serial monitor. After few hours, the serial monitor stopped printing the voltage sensor value but buttonstate value is contentiously printed on serial monitor.
Please tell me what i am doing wrong? or any suggestions? Thanks in advance

2

So you won't see "INPUT V=" anymore but you still get 0 or 1 on each line?
To be honest: I doubt that this is true.

3

What’s the circuit , what voltages are you applying? What happens when you reboot it. Do you leave the voltage on when you power the Arduino down ?
Largely irrelevant but ...

Have a think about the maths too - if the analog input is an integer , what do you expect to happen to the result by multiplying/dividing it with floats ? - resolution can never be more that 1 part in 1024.
You can avoid trying to get decimal points by outputting millivolts .