Arduino/elegoo-kit-lessons/Lesson 11 DHT11 Temperature and Humidity Sensor/DHT11/DHT11.ino

//www.elegoo.com
//2016.12.9

#include <SimpleDHT.h>
#include <avr/sleep.h>
// for DHT11, 
//      VCC: 5V or 3V
//      GND: GND
//      DATA: 2
int pinDHT11 = 2;
SimpleDHT11 dht11;

void blink(int delayTime) {
  digitalWrite(13, HIGH);
  delay(delayTime);              
  digitalWrite(13, LOW);    
  delay(delayTime); 
}

void change(){
  delay(500);
  blink(1000);
  delay(500);
}
int ct = 0; 
int SerialTransmit = 1;
int pin2_interrupt_flag = 0;

void pin2_isr()
{
  sleep_disable();
  detachInterrupt(0);
  pin2_interrupt_flag = 1;
}

void setup() {
  if(SerialTransmit){Serial.begin(9600);}
  pinMode(13,OUTPUT);
}

void loop() {
  // start working...
  
//  sleep_enable();
//  attachInterrupt(0, pin2_isr, LOW);
  /* 0, 1, or many lines of code here */
  

  if(SerialTransmit){
    Serial.println("=================================");
    Serial.println("Sample DHT11...");
  }
  byte temperature = 0;
  byte humidity = 0;
  byte data[40] = {0};
  // read with raw sample data
  if(ct >= 0){
  dht11.read(pinDHT11, &temperature, &humidity, data);
  ct++; 

  // TEMPERATURE 
  for (int i = 0; i < (int)temperature/100; i++){
    blink(50);
  }

  change();
  for (int i = 0; i < (int)temperature/10; i++){
    blink(50);
  }

  change();
  for (int i = 0; i < (int)temperature%10; i++){
    blink(50);
  }
  
  // HUMIDITY  
  change();
  for (int i = 0; i < (int)humidity/10; i++){
    blink(50);
    }
    
  change();
  for (int i = 0; i < (int)humidity%10; i++){
    blink(50);
    }
  }
  
  delay(1000);

  
  if(SerialTransmit){
  if (dht11.read(pinDHT11, &temperature, &humidity, data)) {
    Serial.print("Read DHT11 failed");
    return;
  }

  Serial.print("Sample RAW Bits: ");
  for (int i = 0; i < 40; i++) {
    Serial.print((int)data[i]);
    if (i > 0 && ((i + 1) % 4) == 0) {
      Serial.print(' ');
    }
  }
  Serial.println("");
  
  Serial.print("Sample OK: ");
  Serial.print((int)temperature); Serial.print(" *C, ");
  Serial.print((int)humidity); Serial.println(" %");
  
  // DHT11 sampling rate is 1HZ.
  delay(1000);
  }
//  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
//  cli();
//  sleep_bod_disable();
//  sei();
//  sleep_cpu();
//  /* wake up here */
//  sleep_disable();
//  ct = 0;
}