// https://wokwi.com/projects/412029350708941825

int ChargePin = 8;
int inputPinC = A0;

unsigned long previousMeasureMillis = 0;
unsigned long previousMillis = 0;
const long chargeInterval = 10000;        // 10s charge/discharge time
const long measureInterval = 40;         

int chargeState = LOW;
float Vcapacitor = 0.0;

int burst = 50; // 

void setup() {
  pinMode(ChargePin, OUTPUT);
  Serial.begin(115200);
}

void loop() {
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= chargeInterval) {
    previousMillis += chargeInterval;
    burst = 50; // reset 
    if (chargeState == LOW) {
      chargeState = HIGH;
    } else {
      chargeState = LOW;
    }
    digitalWrite(ChargePin, chargeState);
  }

  if (currentMillis - previousMeasureMillis >= measureInterval) {
    previousMeasureMillis += measureInterval;
    if (burst) { // print samples only during burst
      // Read analog value and convert to voltage
      Vcapacitor = (analogRead(inputPinC) / 1023.0) * 5.0;  // Convert raw value to voltage

      // Print the capacitor voltage in volts
      Serial.print("DATA: ");
      Serial.print(Vcapacitor, 3);  // Print capacitor voltage with 2 decimal places
      Serial.println();
      --burst;
    }
  }
}