Difference between revisions of "Temperature and Humidity Sensor"
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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. | |
| − | + | delay(2000); | |
| − | + | Serial.print("Requesting data..."); | |
| − | + | errorCode = myDHT22.readData(); | |
| − | + | switch(errorCode) | |
| − | + | { | |
(3)Test Results | (3)Test Results | ||
Revision as of 11:06, 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.
Specification
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
（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
