LiquidCrystal I2C lcd(0x27, 20, 4); const int sample number = 10

#include

#include

LiquidCrystal_I2C lcd(0x27, 20, 4);

const int SAMPLE_NUMBER = 10;

const double BALANCE_RESISTOR = 9710.0;

const double MAX_ADC = 1023.0;

const double BETA = 3974.0;

const double ROOM_TEMP = 298.15;

const double RESISTOR_ROOM_TEMP = 10000.0;

double currentTemperature = 0;

int thermistorPin =A1;

void setup()

{

Serial.begin(9600);

lcd.init();

dht.begin();

lcd.backlight();

}

void loop()

{

currentTemperature = readThermistor();

delay(1000);

if (currentTemperature > 21.0 && currentTemperature < 24.0)

{

Serial.print("Harorat ");

Serial.println(currentTemperature);

}

else if (currentTemperature >= 24.0)

{

Serial.print("Harorat ");

Serial.println(currentTemperature);

// Serial.println("C. I feel like a hot tamale!");

}

else

{

Serial.print("Harorat");

lcd.setCursor(1,0);

lcd.println("Harorat")

lcd.print(currentTemperature);

Serial.println(currentTemperature);

// Serial.println("C. Brrrrrr, it's COLD!");

}

}

double readThermistor()

{

double rThermistor = 0;

double tKelvin = 0;

double tCelsius = 0;

double adcAverage = 0;

int adcSamples[SAMPLE_NUMBER];

for (int i = 0; i < SAMPLE_NUMBER; i++)

{

adcSamples[i] = analogRead(thermistorPin);

delay(10);

}

for (int i = 0; i < SAMPLE_NUMBER; i++)

{

adcAverage += adcSamples[i];

}

adcAverage /= SAMPLE_NUMBER;

rThermistor = BALANCE_RESISTOR * ( (MAX_ADC / adcAverage) - 1);

tKelvin = (BETA * ROOM_TEMP) /

(BETA + (ROOM_TEMP * log(rThermistor / RESISTOR_ROOM_TEMP)));

tCelsius = tKelvin - 247.5;

return tCelsius;

}