Difference between revisions of "Temperature and Humidity Sensor"

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(Test tools and test)
(Test tools and test)
Line 46: Line 46:
 
    DHT22_ERROR_t errorCode;
 
    DHT22_ERROR_t errorCode;
 
   // The sensor can only be read from every 1-2s, and requires a minimum
 
   // The sensor can only be read from every 1-2s, and requires a minimum
 // 2s warm-up after power-on.
+
// 2s warm-up after power-on.
 delay(2000);
+
  delay(2000);
  
 Serial.print("Requesting data...");
+
  Serial.print("Requesting data...");
 errorCode = myDHT22.readData();
+
  errorCode = myDHT22.readData();
 switch(errorCode)
+
  switch(errorCode)
 {
+
  {
 
(3)Test Results
 
(3)Test Results
  

Revision as of 11:07, 19 April 2016

Introduction

This is a powerful sister version of our Linker kit - Temperature and Humidity Sensor. It has more complete and accurate performance. The detecting range of this sensor is 5% RH - 99% RH, and -40°C - 80°C. And its accuracy satisfyingly reaches up to 2% RH and 0.5°C. A professional choice for applications that have relatively strict requirements.

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Specification

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Platforms Supported

  • Arduino
  • Raspberry Pi

Test

Test tools and test

(1)Test tools

  • Arduino UNO x 1 
  • Linker Base Shield x 1
  • Linker temperature & humidity sensor x1

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(2)、Program

  #include <DHT22.h>
  // Only used for sprintf
  #include <stdio.h>
  // Data wire is plugged into port 7 on the Arduino
  // Connect a 4.7K resistor between VCC and the data pin (strong pullup)
  #define DHT22_PIN 7
  // Setup a DHT22 instance
  DHT22 myDHT22(DHT22_PIN);
  void setup(void)
 {

   // start serial port    Serial.begin(9600);    Serial.println("DHT22 Library Demo");

  }
  void loop(void)
  { 
  DHT22_ERROR_t errorCode;
 // The sensor can only be read from every 1-2s, and requires a minimum

// 2s warm-up after power-on.   delay(2000);

  Serial.print("Requesting data...");   errorCode = myDHT22.readData();   switch(errorCode)   { (3)Test Results

1-211.png

Documents

Test code download