#include <OneButton.h>

#define ntc_pin A0
#define nominal_resistance 10000
#define nominal_temeprature 25
#define samplingrate 5
#define beta 3950
#define Rref 10000
#define keypin 2
#define FAN 3
OneButton key(keypin,true,true);//低电平有效，开启内部拉高 INPUT_PULLUP
int samples = 0 ,state = 0, number = 0, flag = 0;

void singleClick()
{
  number++;
  if(number > 2) number = 0;
  Serial.println(number);
}

void longPress()
{
  state++;
  if(state > 1) state = 0;
  Serial.println(state);
}

void setup(void) {
  Serial.begin(9600);
  pinMode(FAN, OUTPUT);
  key.setDebounceTicks(30);//按键消抖时间
  key.attachClick(singleClick);//单击
  key.setPressTicks(1500);//按键长按时间
  key.attachDuringLongPress(longPress);//长按触发
}

void loop(void) {
  key.tick();
  uint8_t i;
  float average = 0.0;
  samples = 0;

  for (i = 0; i < samplingrate; i++) {
    samples += analogRead(ntc_pin);
    delay(10);}
  average = samples / samplingrate;
  //Serial.print("ADC readings ");
  //Serial.println(average);
  average = 1023 / average - 1;
  average = Rref / average;
  //Serial.print("Thermistor resistance ");
  //Serial.println(average);
  float temperature;
  temperature = average / nominal_resistance;
  temperature = log(temperature);
  temperature /= beta;
  temperature += 1.0 / (nominal_temeprature + 273.15);
  temperature = 1.0 / temperature;
  temperature -= 273.15;

  Serial.print("Temperature ");
  Serial.print(temperature);
  Serial.println(" *C");

  if(state == 0){
    if(number  == 0){
      if(temperature < 45){
        digitalWrite(FAN, HIGH);
      }else{
        digitalWrite(FAN, LOW);
      }
    }

    if(number  == 1){
      if(temperature < 50){
        digitalWrite(FAN, HIGH);
      }else{
        digitalWrite(FAN, LOW);
      }
    }

    if(number  == 2){
      if(temperature < 55){
        digitalWrite(FAN, HIGH);
      }else{
        digitalWrite(FAN, LOW);
      }
    }
  }else{
    digitalWrite(FAN, LOW);
  }
  
  delay(100);
}