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+[[:ocrobot:modules|返回]]
+=====DHT11温度传感器=====
+这是DHT11温湿度传感器介绍页面
+-----
+====引言====
+DHT11温湿度传感器是一款廉价的温度湿度传感器，使用单总线通讯协议，使用方便，arduino驱动方案推荐使用DHT-sensor-library驱动库
+DHT11传感器提供了测量温度湿度的极其廉价的解决方案，适合业余爱好者进行一些基础数据记录，虽然传感器的速度非常缓慢。
+====产品规格====
+V-5V电源
+.5mA最大电流需求
+%-80% 湿度测量范围  5%误差
+℃-50℃温度测量范围  ±2℃误差
+I2C数据接口
+-----
+====驱动====
+arduino驱动库下地址:
+ {{:en:ocrobot:modules:dht_sensor.zip|DHT-sensor-library}}
+以上库文件解压缩后需放到<你的arduino主目录>/libraries/下
+此库适用于目前1.04及以前版本（不低于1.0版本），更新的兼容性请关注github跟新信息
+该项目github托管地址
+https://github.com/adafruit/DHT-sensor-library
+-----
+====产品照片====
+{{:en:ocrobot:modules:dht11.jpg|}}
+====简易使用教程====
+===接线图===
+电阻使用10k电阻
+{{:en:ocrobot:modules:dhtwiring.gif|}}
+====演示程序（基于arduino）====
+<code cpp>
+// Example testing sketch for various DHT humidity/temperature sensors
+// Written by ladyada, public domain
+#include "DHT.h"
+#define DHTPIN 2     // what pin we're connected to
+// Uncomment whatever type you're using!
+#define DHTTYPE DHT11   // DHT 11
+//#define DHTTYPE DHT22   // DHT 22  (AM2302)
+//#define DHTTYPE DHT21   // DHT 21 (AM2301)
+// Connect pin 1 (on the left) of the sensor to +5V
+// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
+// to 3.3V instead of 5V!
+// Connect pin 2 of the sensor to whatever your DHTPIN is
+// Connect pin 4 (on the right) of the sensor to GROUND
+// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
+// Initialize DHT sensor.
+// Note that older versions of this library took an optional third parameter to
+// tweak the timings for faster processors.  This parameter is no longer needed
+// as the current DHT reading algorithm adjusts itself to work on faster procs.
+DHT dht(DHTPIN, DHTTYPE);
+void setup() {
+  Serial.begin(9600);
+  Serial.println("DHTxx test!");
+  dht.begin();
+}
+void loop() {
+  // Wait a few seconds between measurements.
+  delay(2000);
+  // Reading temperature or humidity takes about 250 milliseconds!
+  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+  float h = dht.readHumidity();
+  // Read temperature as Celsius (the default)
+  float t = dht.readTemperature();
+  // Read temperature as Fahrenheit (isFahrenheit = true)
+  float f = dht.readTemperature(true);
+  // Check if any reads failed and exit early (to try again).
+  if (isnan(h) || isnan(t) || isnan(f)) {
+    Serial.println("Failed to read from DHT sensor!");
+    return;
+  }
+  // Compute heat index in Fahrenheit (the default)
+  float hif = dht.computeHeatIndex(f, h);
+  // Compute heat index in Celsius (isFahreheit = false)
+  float hic = dht.computeHeatIndex(t, h, false);
+  Serial.print("Humidity: ");
+  Serial.print(h);
+  Serial.print(" %\t");
+  Serial.print("Temperature: ");
+  Serial.print(t);
+  Serial.print(" *C ");
+  Serial.print(f);
+  Serial.print(" *F\t");
+  Serial.print("Heat index: ");
+  Serial.print(hic);
+  Serial.print(" *C ");
+  Serial.print(hif);
+  Serial.println(" *F");
+}
+</code>
+====相关资料====
+{{:en:ocrobot:modules:dht11-chinese.pdf|DHT11数据手册（中文）}}