void loop() {
  processValueFromRegulator(requestSendSetpoint, intervalRequestSetpoint, &lastRequestSetpoint);
  processValueFromRegulator(temperature, intervalRequestTemperature, &lastRequestTemperature);
  processValueFromRegulator(fanPWM, intervalRequestFanPWM, &lastRequestFanPWM);
  processValueFromRegulator(heaterPWM, intervalRequestHeaterPWM, &lastRequestHeaterPWM);
  processSetpoint();
}

void processValueFromRegulator(byte requestValue, int interval, unsigned long timeOfLastRequest) {
  if (intervalTimePassed(interval, timeOfLastRequest)) {
    if (isDeviceResponding(adressRegulator)) {
      requestFromRegulator(requestValue);
    }
    if (Wire.available()) {
      serveIncomingTWI(sizeof(float), &bufferTWI[0]);
      displayOnLCD(requestValue, mergeBytesToFloat(&bufferTWI[0]));
   } else {
     Serial.println("ERROR: Wire not available...");
    }
  }
}