Arduino + BMP180 显示气压 温度

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<span style="color: rgb(68, 68, 68); font-family: Tahoma, 'Microsoft Yahei', Simsun; font-size: 14px; line-height: 21px;">这是BMP180模块，四个引脚</span><br style="word-wrap: break-word; color: rgb(68, 68, 68); font-family: Tahoma, 'Microsoft Yahei', Simsun; font-size: 14px; line-height: 21px;" /><br style="word-wrap: break-word; color: rgb(68, 68, 68); font-family: Tahoma, 'Microsoft Yahei', Simsun; font-size: 14px; line-height: 21px;" /><span style="color: rgb(68, 68, 68); font-family: Tahoma, 'Microsoft Yahei', Simsun; font-size: 14px; line-height: 21px;">以Arduino Uno为例：VCC 接3.3v，GND接GND，SCL接A5，SDA接A4</span>

<span style="color: rgb(68, 68, 68); font-family: Tahoma, 'Microsoft Yahei', Simsun; font-size: 14px; line-height: 21px;">库：http://pan.baidu.com/s/1i3KN4Vj</span>

<span style="color: rgb(68, 68, 68); font-family: Tahoma, 'Microsoft Yahei', Simsun; font-size: 14px; line-height: 21px;"></span><pre name="code" class="cpp">#include <SFE_BMP180.h>#include <Wire.h> SFE_BMP180 pressure;// 创建一个气压计对象 double baseline; // 基准气压 void setup(){  Serial.begin(9600);  Serial.println("REBOOT");   // 初始化传感器  if (pressure.begin())    Serial.println("BMP180 init success");  else  {    // 糟糕，气压计出问题了，多半是连线有问题    Serial.println("BMP180 init fail (disconnected?)\n\n");    while(1); // 暂停  }   //获得基准气压  baseline = getP();   Serial.print("baseline pressure: ");  Serial.print(baseline);  Serial.println(" hPa");  } void loop(){  double a,p,t;  p = getP();// 获得一个气压值  a = pressure.altitude(p,baseline);//获得基于基准气压的高度值   Serial.print("relative altitude: ");  if (a >= 0.0) Serial.print(" "); // 调整正数显示格式  Serial.print(a,1);  Serial.print(" meters ");     t = getT();// 获得一个温度值  Serial.print("temperature: ");  Serial.print(t,1);  Serial.println(" degrees");      delay(500);//刷新率}  double getP(){  char status;  double T,P,p0,a;  // You must first get a temperature measurement to perform a pressure reading.  // Start a temperature measurement:  // If request is successful, the number of ms to wait is returned.  // If request is unsuccessful, 0 is returned.  status = pressure.startTemperature();  if (status != 0)  {    // Wait for the measurement to complete:    delay(status);    // Retrieve the completed temperature measurement:    // Note that the measurement is stored in the variable T.    // Use '&T' to provide the address of T to the function.    // Function returns 1 if successful, 0 if failure.     status = pressure.getTemperature(T);    if (status != 0)    {      // Start a pressure measurement:      // The parameter is the oversampling setting, from 0 to 3 (highest res, longest wait).      // If request is successful, the number of ms to wait is returned.      // If request is unsuccessful, 0 is returned.      status = pressure.startPressure(3);      if (status != 0)      {        // Wait for the measurement to complete:        delay(status);        // Retrieve the completed pressure measurement:        // Note that the measurement is stored in the variable P.        // Use '&P' to provide the address of P.        // Note also that the function requires the previous temperature measurement (T).        // (If temperature is stable, you can do one temperature measurement for a number of pressure measurements.)        // Function returns 1 if successful, 0 if failure.        status = pressure.getPressure(P,T);        if (status != 0)        {          return P;        }        else Serial.println("error retrieving pressure measurement\n");      }      else Serial.println("error starting pressure measurement\n");    }    else Serial.println("error retrieving temperature measurement\n");  }  else Serial.println("error starting temperature measurement\n");} double getT(){  char status;  double T,p0;  status = pressure.startTemperature();  if (status != 0)  {    delay(status);    status = pressure.getTemperature(T);    if (status != 0)    {      status = pressure.startPressure(3);      return T;    }    else Serial.println("error retrieving temperature measurement\n");  }  else Serial.println("error starting temperature measurement\n");}

效果：

参考资料：https://learn.sparkfun.com/tutorials/bmp180-barometric-pressure-sensor-hookup-