code op zonnepaneel

zon.ino

#define PIN_BT_PWR 2
#define PIN_SOLAR_CURRENT A7
#define PIN_SOLAR_VOLTAGE A1
#define PIN_BUTTON 3

uint32_t calibratedZero = 0;
bool firstrun = true;

void setup() {
  pinMode(PIN_BT_PWR, OUTPUT);
  pinMode(PIN_BUTTON, INPUT_PULLUP);
  digitalWrite(PIN_BT_PWR, HIGH);
  Serial.begin(115200);
}

void loop() {
  uint32_t currentRaw = 0;
  uint32_t voltageRaw = 0;
  for(uint16_t i = 0; i < 1000; i++) {
    currentRaw += analogRead(PIN_SOLAR_CURRENT);
    voltageRaw += analogRead(PIN_SOLAR_VOLTAGE);
    delay(1);
  }
  
  if(digitalRead(PIN_BUTTON) == LOW || firstrun) {
    calibratedZero = currentRaw;
    Serial.println("Gekalibreerd.");
  } else {
    int16_t currentAvg = ((currentRaw*1.0-calibratedZero*1.0)/1000.0)/1024.0*50.0*-1000;
    float voltageAvg = voltageRaw / 1024.0 * 5.0 * 0.0049;
    float powerAvg = voltageAvg * currentAvg / 1000.0;
    Serial.print(currentAvg);
    Serial.print(" mA\t");
    Serial.print(voltageAvg);
    Serial.print(" V\t");
    Serial.print(powerAvg);
    Serial.println(" W");
  }

  firstrun = false;
}