Projekt Durchfluss- und Temperaturüberwachung mit einem Arduino Nano

#include <OneWire.h>
#include <DallasTemperature.h>
#include <FreqMeasure.h>

#define FREQUENCY_TO_LITERS_PER_HOUR 22.78481

#define ADC_PLUS_BITS 5

#define ONE_WIRE_BUS 4

OneWire oneWire(ONE_WIRE_BUS);

DallasTemperature sensors(&oneWire);

DeviceAddress Probe1 = { 0x28, 0xFF, 0x2B, 0x2E, 0x72, 0x16, 0x03, 0xA1 }; // Intake air | Bottom radiator
DeviceAddress Probe2 = { 0x28, 0xFF, 0xE5, 0xBF, 0x71, 0x16, 0x04, 0x28 }; // Ambient air
DeviceAddress Probe3 = { 0x28, 0xFF, 0x06, 0x0D, 0x72, 0x16, 0x03, 0x4D }; // Intake air | External radiator
DeviceAddress Probe4 = { 0x28, 0xFF, 0xDC, 0x92, 0x71, 0x16, 0x05, 0xEC }; // Intake air | Top radiator

float read_analog(int pin) {
  unsigned long sum = analogRead(pin);
  for (int i = 1; i < pow(4, ADC_PLUS_BITS); i++) {
    sum += analogRead(pin);
  }
  return (sum >> ADC_PLUS_BITS) / pow(2, ADC_PLUS_BITS);
}

float get_analog_temp(int thermistor) {
  const float A[6] = {1.111424e-03, 1.537616e-03, 1.250530e-03, 1.512060e-03, 1.640398e-03, 1.613705e-03};
  const float B[6] = {2.225275e-04, 1.599151e-04, 2.081287e-04, 1.635745e-04, 1.472821e-04, 1.516699e-04};
  const float C[6] = {2.427177e-07, 4.491194e-07, 2.482240e-07, 4.305526e-07, 4.650907e-07, 4.490601e-07};
  const int SENSE_RESISTOR[] = {9963, 9970, 9946, 9988, 9964, 9962};

  float v = read_analog(thermistor);
  if (v < 263) return  0.0;
  if (v > 882) return 80.0;

  float r = SENSE_RESISTOR[thermistor] * ((1023.0 / v) - 1.0);
  return (1.0 / (A[thermistor] + B[thermistor] * log(r) + C[thermistor] * pow(log(r), 3))) - 273.15;
}

float get_digital_temp(int probe) {
  switch (probe) {
    case 1:
      return sensors.getTempC(Probe1);
    case 2:
      return sensors.getTempC(Probe2);
    case 3:
      return sensors.getTempC(Probe3);
    case 4:
      return sensors.getTempC(Probe4);
    default:
      return 0;
  }
}

float get_flow_rate() {
  float duration = 0;
  int samples = 0;
  while (FreqMeasure.available()) {
    duration += FreqMeasure.read();
    samples++;
  }
  return FreqMeasure.countToFrequency(duration) * FREQUENCY_TO_LITERS_PER_HOUR * samples;
}

void setup() {
  Serial.begin(9600);
  FreqMeasure.begin();

  analogReference(EXTERNAL);

  ADCSRA &= ~(bit (ADPS0) | bit (ADPS1) | bit (ADPS2));
  ADCSRA |= bit (ADPS1) | bit (ADPS2);

  sensors.begin();

  sensors.setResolution(Probe1, 12);
  sensors.setResolution(Probe2, 12);
  sensors.setResolution(Probe3, 12);
  sensors.setResolution(Probe4, 12);
  sensors.setWaitForConversion(false);
}

void loop() {
  //unsigned long timer = millis();
  sensors.requestTemperatures();
  String output = "";
  for (int i = 0; i < 6; i++) {
    output += get_analog_temp(i);
    output += " ";
  }
  delay(500);
  for (int i = 1; i < 5; i++) {
    output += get_digital_temp(i);
    output += " ";
  }
  output += get_flow_rate();
  Serial.println(output);
  //Serial.println(millis() - timer);
}