(12) Raspberry Pi serial ports and a web server

https://blog.csdn.net/qq_34803821/article/details/86238387

1 serial port

Raspberry Pi Code (python): 
need to install python serial port to read the library file: PIP install pyserial 
(If you have already installed the then ignored) 
found Arduino serial port address: / dev / ttyACM0

　

Arduino Code:

If you run newspaper / x86 or ASCII code can not resolve the error. You can replace all the code in Chinese English, you can not go wrong, probably because they can not recognize Chinese

#include <DHT.h> 

#define DHTPIN. 3 
#define DHTTYPE DHT11 

the DHT DHT (DHTPIN, DHTTYPE); 

void Setup () { 
  // Setup your code here Wallpaper PUT, to RUN Once: 

  Serial.begin (9600); 

  dht.begin (); 

  Serial.println ( "IS running the Arduino Vcancy the Hi ...."); 

} 

/ ** 
  the Arduino Loop 
  @param none 
  @return none 
* / 
char target [] = "the GET TH"; 

void Loop () { 
  / / wait 2 seconds before each output (here must be greater than 1 second and the like, or inaccurate) 
  Delay (2000); 
  // read the data from the serial port and determines 
  IF (Serial.available ()> 0) { 
    IF (Serial.find (target)) { 
      // Get temperature or humidity needs 250 ms! 
      // acquired sensor temperature and humidity may be 2 seconds

      float h = dht.readHumidity (); // read the current humidity 

      float t = dht.readTemperature (); // read the current temperature, the unit C 

      a float F = dht.readTemperature (to true); // read the current the temperature in F 

      // quit if fails to read, then read again 
      IF (isNaN (H) || isNaN (t) || isNaN (f)) { 
        Serial.println ( "failed to DHT from the read the Sensor! "); 
        return; 
      } 

      sensible temperature // reading unit F. 
      a float dht.computeHeatIndex HIF = (F, H); 
      sensible temperature // reading unit C 
      a float dht.computeHeatIndex HIC = (T, H, to 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("体感温度: ");
      Serial.print(hic);
      Serial.print(" *C ");
      Serial.print(hif);
      Serial.println(" *F");
    }
  }

}

　　

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