用USB2.0打印机数据线高速方口连接转接线A公 uno r3开发板 编程 Atmega328P AVR 8位单片机连接在一起。原装 uno r3开发板 编程 Atmega328P AVR 8位单片机和SHT如下图所示

5V —— VCC GND —— GND SCL —— SCL SDA —— SDA 安装Arduino IDE，打开ArduinoIDE，点击项目然后点击加载库，搜索库管理器SHT31点击安装，如下图所示 点击文件，点击示例【Adafruit SHT31 Library】和【SHT31test】，最后点击上传，如下图所示 代码如下

/*************************************************** This is an example for the SHT31-D Humidity & Temp Sensor Designed specifically to work with the SHT31-D sensor from Adafruit ----> https://www.adafruit.com/products/2857 These sensors use I2C to communicate, 2 pins are required to interface ****************************************************/   #include <Arduino.h> #include <Wire.h> #include "Adafruit_SHT31.h"  bool enableHeater = false; uint8_t loopCnt = 0;  Adafruit_SHT31 sht31 = Adafruit_SHT31();  void setup() { 
           Serial.begin(9600);    while (!Serial)     delay(10);     // will pause Zero, Leonardo, etc until serial console opens    Serial.println("SHT31 test");
  if (! sht31.begin(0x44)) { 
           // Set to 0x45 for alternate i2c addr
    Serial.println("Couldn't find SHT31");
    while (1) delay(1);
  }

  Serial.print("Heater Enabled State: ");
  if (sht31.isHeaterEnabled())
    Serial.println("ENABLED");
  else
    Serial.println("DISABLED");
}


void loop() { 
        
  float t = sht31.readTemperature();
  float h = sht31.readHumidity();

  if (! isnan(t)) { 
          // check if 'is not a number'
    Serial.print("Temp *C = "); Serial.print(t); Serial.print("\t\t");
  } else { 
         
    Serial.println("Failed to read temperature");
  }
  
  if (! isnan(h)) { 
          // check if 'is not a number'
    Serial.print("Hum. % = "); Serial.println(h);
  } else { 
         
    Serial.println("Failed to read humidity");
  }

  delay(1000);

  // Toggle heater enabled state every 30 seconds
  // An ~3.0 degC temperature increase can be noted when heater is enabled
  if (loopCnt >= 30) { 
        
    enableHeater = !enableHeater;
    sht31.heater(enableHeater);
    Serial.print("Heater Enabled State: ");
    if (sht31.isHeaterEnabled())
      Serial.println("ENABLED");
    else
      Serial.println("DISABLED");

    loopCnt = 0;
  }
  loopCnt++;
}

程序下载进去之后，显示温度30℃，湿度47%RH。

波特率要选择正确，否则不会有有读数显示出来的。