MODULE CAPTEUR DE LUMIERE A PHOTORESISTANCE LDR

int sensorPin = A5; // Declare the input pin here
 
// Serial output in 9600 baud
void setup()
{
    Serial.begin(9600);
}
 
// The program measures the current voltage value at the sensor,
// calculates from this and the known series resistance the current
// resistance value of the sensor and outputs the results to the serial output
 
void loop()
{      
        // Current voltage value is measured...
    int rawValue = analogRead(sensorPin);
        float voltage = rawValue * (5.0/1023) * 1000;
         
        float resitance = 10000 * ( voltage / ( 5000.0 - voltage) );
         
    // ... and here output to the serial interface
    Serial.print("Voltage value:"); Serial.print(voltage); Serial.print("mV");
    Serial.print(", resistance value:"); Serial.print(resitance); Serial.println("Ohm");
    Serial.println("---------------------------------------");
 
    delay(500);
}