KY-015 Temperature & Humidity Sensor Main

KY-015 Temperature & Humidity Sensor

35.00 EGP

DHT11 digital temperature and humidity sensor is a calibrated digital signal output temperature and humidity combined sensor, which Application-specific modules capture technology and digital temperature and humidity sensor technology to ensure that products with high reliability and excellent Long-term stability.

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Product Description

KY-015 Temperature & Humidity Sensor has excellent quality, fast response, anti-interference ability, low cost and other advantages. Single Wire serial interface that allows quick and easy system integration. Ultra-small size, low power consumption, signal transmission distance Up to 20 meters, making it to the class of applications and even the most demanding applications is the best choice.

KY-015 Temperature & Humidity Sensor Specifications

  • Supply voltage: 3.3 ~ 5.5V DC
  • Output: single-bus digital signal
  • Measuring range: Humidity 20-90% RH, Temperature 0 ~ 50 ℃
  • Accuracy: Humidity + -5% RH, temperature + -2 ℃
  • Resolution: Humidity 1% RH, temperature 1 ℃
  • Long-term stability: <± 1% RH / Year

Notes

  1. to avoid the use of the condensation conditions
  2. long-term storage temperature 10-40 ℃, humidity below 60%
  3. the use of power and ground connection to be correct, so as not to damage the sensor

Required Hardware Devices

  • Arduino controller × 1
  • USB data cable × 1
  • DHT 11 module × 1

Connecting

  • Arduino pin 8 –> Pin S module
  • Arduino GND –> Pin – module
  • Arduino +5 –> Pin Middle

Code

//KY015 DHT11 Temperature and humidity sensor 
int DHpin = 8;
byte dat [5];
byte read_data () {
  byte data;
  for (int i = 0; i < 8; i ++) {
    if (digitalRead (DHpin) == LOW) {
      while (digitalRead (DHpin) == LOW); // wait for 50us
      delayMicroseconds (30); // determine the duration of the high level to determine the data is '0 'or '1'
      if (digitalRead (DHpin) == HIGH)
        data |= (1 << (7-i)); // high front and low in the post
      while (digitalRead (DHpin) == HIGH); // data '1 ', wait for the next one receiver
     }
  }
return data;
}
 
void start_test () {
  digitalWrite (DHpin, LOW); // bus down, send start signal
  delay (30); // delay greater than 18ms, so DHT11 start signal can be detected
 
  digitalWrite (DHpin, HIGH);
  delayMicroseconds (40); // Wait for DHT11 response
 
  pinMode (DHpin, INPUT);
  while (digitalRead (DHpin) == HIGH);
  delayMicroseconds (80); // DHT11 response, pulled the bus 80us
  if (digitalRead (DHpin) == LOW);
  delayMicroseconds (80); // DHT11 80us after the bus pulled to start sending data
 
  for (int i = 0; i < 4; i ++) // receive temperature and humidity data, the parity bit is not considered
    dat[i] = read_data ();
 
  pinMode (DHpin, OUTPUT);
  digitalWrite (DHpin, HIGH); // send data once after releasing the bus, wait for the host to open the next Start signal
}
 
void setup () {
  Serial.begin (9600);
  pinMode (DHpin, OUTPUT);
}
 
void loop () {
  start_test ();
  Serial.print ("Current humdity =");
  Serial.print (dat [0], DEC); // display the humidity-bit integer;
  Serial.print ('.');
  Serial.print (dat [1], DEC); // display the humidity decimal places;
  Serial.println ('%');
  Serial.print ("Current temperature =");
  Serial.print (dat [2], DEC); // display the temperature of integer bits;
  Serial.print ('.');
  Serial.print (dat [3], DEC); // display the temperature of decimal places;
  Serial.println ('C');
  delay (700);
}

Using the DHT11 Temperature & Humidity sensor with an Arduino - Tutorial


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Additional Information

Weight5 g

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