Code BB_withCalibrationFunction

#include "FastLED.h"

#define NUM_LEDS 24

#define DATA_PIN 8

#define breathPin A0

#define ledPin 3

#define buttonPin 4

#define MAX_POWER_MILLIAMPS 5000

CRGB leds[NUM_LEDS];

int brightness = 0;

int hue = 255;      //Hue-Range: 0=gelbrosa, 31= gelbgrün, 63=grün, 94=blaugrün, 127=(grün)blau, 158=blaublaub, 190=lilablau, 221=lila(blaurosa), 255=gelbrosa

int sensorHigh = 0;       //to surely have a new sensor reading, we did sensorHigh/sensorLow to something it will fo sure be changed.

int sensorLow = 1023;     //but it will cause a blinking light when not calibrated the belt by tearing it because it will filp into minus!

int buttonState = 0;

int led = 0;

int buttonCounter = 0;

int var = 0;

//void(* resetFunc) (void) = 0;  // declare reset fuction at address 0

void setup() {

  Serial.begin(115200);

  Serial.print("Inizializing FastLED..");

  FastLED.addLeds<WS2812B, DATA_PIN, GRB>(leds, NUM_LEDS);

  Serial.println("Done");

  Serial.print("hue");

  Serial.println(hue);

  pinMode(breathPin, INPUT);

  pinMode(buttonPin, INPUT);

  pinMode(ledPin, OUTPUT);

  //// Calibrating Breathing Belt /////

  Serial.print("Hi, I'm in Setup and calibrating... ");

  while (millis() < 5000) {

    //indicate the calibration by a light

      digitalWrite(ledPin, HIGH);

    // record the maximum sensor value

    int breathVal = analogRead(breathPin);

    Serial.print("\t breathVal: ");

    Serial.println(breathVal);

    if (breathVal > sensorHigh) {

      sensorHigh = breathVal;

    }

    //record the minimum sensor value

    if (breathVal < sensorLow) {

      sensorLow = breathVal;

    }

  }

  Serial.println("calibration finished");

    digitalWrite(ledPin, LOW);

}

void loop() {

  //// Calibration on Button Pushed ////////////////////////////

  buttonState = digitalRead(buttonPin);

  Serial.print("buttonState: ");

  Serial.print(buttonState);

  Serial.print("\t buttonCounter: ");

  Serial.println(buttonCounter);

  if (buttonState == HIGH ) {

    buttonCounter = 1;

  }

  if(buttonCounter == 1 ){

    calibration();

    //resetFunc(); //call reset

    //Serial.println("I never run this line of colde because I did a reset before I get here");

  }

   var = 0;

   buttonCounter = 0;

  // calibration finished /////////////////////////////////

  /////////////////////////////////////////////////////////

  if (buttonState == LOW && buttonCounter == 0) {

    int breath = analogRead(breathPin);

    int mappedBreath = map(breath, sensorLow, sensorHigh, 0, 255);

    int constrBreath = constrain(mappedBreath, 0, 255);

    Serial.print("\t breath: ");

    Serial.print(breath);

    Serial.print("\t mappedBreath: ");

    Serial.print(mappedBreath);

    Serial.print("\t SensorLow: ");

    Serial.print(sensorLow);

    Serial.print("\t SensorHigh: ");

    Serial.print(sensorHigh);

    //// LIGHT ////////////////////////////

    brightness = map(constrBreath, 0, 255, 255 , 50);

    for (uint16_t i = 0; i < NUM_LEDS; i++) {

      leds[i] = CHSV(hue, 100, brightness);

      delay(10);

    }

    FastLED.show();

    Serial.print("\t brightness");

    Serial.println(brightness);

    delay(10);

  }

}

void calibration()

{

     Serial.print("calibrating... ");

    while ( var < 3500) {

      //indicate the calibration by a light

      digitalWrite(ledPin, HIGH);

      for (uint16_t i = 0; i < NUM_LEDS; i++) {

        leds[i] = CHSV(200, 100, 0);        //indicate c in blue

      }

      FastLED.show();

      // record the maximum sensor value

      int breathVal = analogRead(breathPin);

      Serial.print("\t breathVal: ");

      Serial.println(breathVal);

      if (breathVal > sensorHigh) {    //you can not take sensorHigh and sensorLow for comparsion. Because it stores the last "callibrated" value and not from silent.

        sensorHigh = breathVal;        //So if someone pulled very hard, it will never ajust to a soft pull.

      }

      //record the minimum sensor value

      if (breathVal < sensorLow) {

        sensorLow = breathVal;

      }

      var++;

    }

    Serial.println("calibration finished");

    digitalWrite(ledPin, LOW);

    delay(10);

}