Arduino 温度传感器（LM35、18b20、DH11）

我就是我 2022-04-10 03:08 761阅读 0赞

## 硬件： ##

Arduino UNO板  
LM35温度传感器  
18b20温度传感器  
DH11温湿度传感器

> LM35温度传感器  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NzM4ODM4_size_16_color_FFFFFF_t_70]

> 18b20温度传感器  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NzM4ODM4_size_16_color_FFFFFF_t_70 1]

> DH11温湿度传感器  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NzM4ODM4_size_16_color_FFFFFF_t_70 2]

## 软件 ##

Arduino IDE

## 接线 ##

<table> 
 <thead> 
  <tr> 
   <th>Arduino</th> 
   <th>传感器</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>5V</td> 
   <td>VCC</td> 
  </tr> 
  <tr> 
   <td>GND</td> 
   <td>GND</td> 
  </tr> 
  <tr> 
   <td>信号引脚</td> 
   <td>S</td> 
  </tr> 
 </tbody> 
</table>

## 程序 ##

> LM35温度传感器

float temp = 0;
    void setup() {
      
      Serial.begin(9600); 
      Serial.println(F("reading LM35 begin. \n")); 
      
    }
    
    void loop() {
     
      static unsigned long sensortStamp = 0;
      //设置每100ms读取一次LM35传感器数据
      if(millis() - sensortStamp > 100){
        sensortStamp = millis();
    
        int reading = analogRead(2); //注意到我们是把LM35的输出端连接到了A2，所以这里是analogRead(2)
        temp = reading *0.0048828125*100;
        Serial.print(F("Real Time Temp: ")); 
        Serial.println(temp); 
      }
      
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NzM4ODM4_size_16_color_FFFFFF_t_70 3]

> 18b20温度传感器

#include <DallasTemperature.h>
    #define ONE_WIRE_BUS A2 //温度 使用A2端口
    OneWire oneWire(ONE_WIRE_BUS);//温度
    DallasTemperature sensors(&oneWire);//温度
    float temp;
    void setup() {
      sensors.begin();
      Serial.begin(9600);
      Serial.println(F("reading 18b20 begin. \n")); 
    }
    
    void loop() {
       static unsigned long sensortStamp = 0;
      //设置每100ms读取一次18b20传感器数据
      if(millis() - sensortStamp > 100){
        sensortStamp = millis();
        sensors.requestTemperatures();
        temp=sensors.getTempCByIndex(0);
        Serial.print(F("Real Time Temp: "));  
        Serial.println(temp);  
      }
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NzM4ODM4_size_16_color_FFFFFF_t_70 4]

> DH11温湿度传感器

#include <dht11.h>              //引用dht11库文件
    #define DHT11PIN 9              //定义温湿度针脚号为9号引脚
    dht11 DHT11; 
    float tem;
    float hum;
    void setup() {
      Serial.begin(9600);           //设置波特率参数
      pinMode(DHT11PIN,INPUT);  
      Serial.println(F("reading Dh11 begin. \n"));
    }
    
    void loop() {
      static unsigned long sensortStamp = 0;
      if(millis()-sensortStamp>1000){
        sensortStamp=millis();
        int chk = DHT11.read(DHT11PIN);                 //将读取到的值赋给chk
        tem=(float)DHT11.temperature;               //将温度值赋值给tem
        hum=(float)DHT11.humidity;                   //将湿度值赋给hum
        Serial.print(F("Real Time tem: "));  
        Serial.println(tem);  
        Serial.print(F("Real Time hum: "));  
        Serial.println(hum);  
      }
    
    }

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