37款传感器与执行器的提法,在网络上广泛流传,其实Arduino能够兼容的传感器模块肯定是不止这37种的。鉴于本人手头积累了一些传感器和执行器模块,依照实践出真知(一定要动手做)的理念,以学习和交流为目的,这里准备逐一动手尝试系列实验,不管成功(程序走通)与否,都会记录下来—小小的进步或是搞不掂的问题,希望能够抛砖引玉。
是博世Sensortec的新数字气压传感器,具有很高的性能,使应用先进的移动设备,如智能手机、平板电脑和体育设备。它遵循了BMP085带来了很多改进,像小尺寸和数字接口的扩张。超低功耗降至3μA使BMP180节电为您的移动设备的领导者。BMP180也是杰出的非常稳定的性能,最好有独立电源供电。BMP180是一款高精度、小体积、超低能耗的压力传感器,可以应用在移动设备中它的性能卓越,绝对精度最低可以达到0.03hPa,并且耗电极低,只有3μA。BMP180采用强大的8-pin陶瓷无引线芯片承载(LCC)超薄封装,可以通过I2C总线直接与各种微处理器相连。
BMP180主要特点
压力范围:3001100hPa(海拔9000米-500米)
电源电压:1.8V3.6V(VDDA),1.62V3.6V(VDDD) VIN需要5V
LCC8封装:无铅陶瓷载体封装(LCC)
低功耗:5μA,在标准模式
高精度:低功耗模式下,分辨率为0.06hPa(0.5米)
高线性模式下,分辨率为0.03hPa(0.25米)
含温度输出
I2C接口
温度补偿
无铅,符合RoHS规范
MSL 1反应时间:7.5ms
待机电流:0.1μA
压力范围300……1100 hPa
均方根噪声中表达压力0.06 hPa typ。(超低功耗模式)
0.02 hPa typ。(超高分辨率模式)
均方根噪声中表达高度0.5 m,typ。(超低功耗模式)
0.17米,typ。(超高分辨率模式)
相对精度的压力
VDD = 3.3 v 950……1050 hPa / hPa±0.12
@ 25°C / m±1.0
700年……900 hPa / hPa±0.12
25…40°C / m±1.0
绝对精度
p = 300…1100 hpa
(温度= 0…+ 65°C,VDD = 3.3。-4.0 V)压力:……+ 2.0 hPa
温度:±1°C,typ。
平均电流消耗(1 Hz刷新率数据)
峰值电流3μA典型(超低功耗模式)
32μA,典型的(高级模式)
650μA,典型的
待机电流1.62……3.6 V
电源电压vddio 1.62……3.6 V
电源电压vdd 1.8……3.6 V
操作温度。
范围全面准确”40…+ 85°C
0…+ 65°C
conv压力。5毫秒,典型的(标准模式)
I2C传输速率3.4 MHz,马克斯。
BMP180典型应用
GPS精准导航(航位推算,上下桥检测等)
室内室外导航
休闲、体育和医疗健康等监测
天气预报
垂直速度指示(上升/下沉速度)
风扇功率控制
体育设备,如高度剖面
BMP180气压模块是一款高精度、小体积、低能耗的压力传感器,可以应用在移动设备中,它的性能卓越,绝对精度最低可以达到0.03hPa,并且耗电极低,只有3μA。BMP180采用强大的8-pin陶瓷无引线芯片承载(LCC)超薄封装,可以通过I2C总线直接与各种微处理器相连。
模块电原理图
SFE_BMP180.h
/*
【Arduino】66种传感器模块系列实验(68)
实验六十八:BMP180 新款 BOSCH温度模块气压传感器(代替BMP085)
SFE_BMP180.h
*/
#ifndef SFE_BMP180_h
#define SFE_BMP180_h
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
class SFE_BMP180
{
public:
SFE_BMP180();
char begin();
shorted?)
char startTemperature(void);
char getTemperature(double &T);
startTemperature command
char startPressure(char oversampling);
char getPressure(double &P, double &T);
startPressure command
double sealevel(double P, double A);
weather data)
double altitude(double P, double P0);
sea-level, runway, etc.)
char getError(void);
private:
char readInt(char address, int16_t &value);
char readUInt(char address, uint16_t &value);
char readBytes(unsigned char *values, char length);
char writeBytes(unsigned char *values, char length);
subsequent registers)
int16_t AC1,AC2,AC3,VB1,VB2,MB,MC,MD;
uint16_t AC4,AC5,AC6;
double c5,c6,mc,md,x0,x1,x2,y0,y1,y2,p0,p1,p2;
char _error;
};
#define BMP180_ADDR 0x77
#define BMP180_REG_CONTROL 0xF4
#define BMP180_REG_RESULT 0xF6
#define BMP180_COMMAND_TEMPERATURE 0x2E
#define BMP180_COMMAND_PRESSURE0 0x34
#define BMP180_COMMAND_PRESSURE1 0x74
#define BMP180_COMMAND_PRESSURE2 0xB4
#define BMP180_COMMAND_PRESSURE3 0xF4
SFE_BMP180.cp
/*
【Arduino】66种传感器模块系列实验(68)
实验六十八:BMP180 新款 BOSCH温度模块气压传感器(代替BMP085)
SFE_BMP180.cp
*/
#include
#include
#include
#include
SFE_BMP180::SFE_BMP180()
{
}
char SFE_BMP180::begin()
{
double c3,c4,b1;
Wire.begin();
if (readInt(0xAA,AC1) &&
readInt(0xAC,AC2) &&
readInt(0xAE,AC3) &&
readUInt(0xB0,AC4) &&
readUInt(0xB2,AC5) &&
readUInt(0xB4,AC6) &&
readInt(0xB6,VB1) &&
readInt(0xB8,VB2) &&
readInt(0xBA,MB) &&
readInt(0xBC,MC) &&
readInt(0xBE,MD))
{
AC6 = 23153;
Calcs.pdf
25671; AC6 = 18974;
c3 = 160.0 * pow(2,-15) * AC3;
c4 = pow(10,-3) * pow(2,-15) * AC4;
b1 = pow(160,2) * pow(2,-30) * VB1;
c5 = (pow(2,-15) / 160) * AC5;
c6 = AC6;
mc = (pow(2,11) / pow(160,2)) * MC;
md = MD / 160.0;
x0 = AC1;
x1 = 160.0 * pow(2,-13) * AC2;
x2 = pow(160,2) * pow(2,-25) * VB2;
y0 = c4 * pow(2,15);
y1 = c4 * c3;
y2 = c4 * b1;
p0 = (3791.0 - 8.0) / 1600.0;
p1 = 1.0 - 7357.0 * pow(2,-20);
p2 = 3038.0 * 100.0 * pow(2,-36);
return(1);
}
else
{
return(0);
}
}
char SFE_BMP180::readInt(char address, int16_t &value)
{
unsigned char data[2];
data[0] = address;
if (readBytes(data,2))
{
value = (int16_t)((data[0]<<8)|data[1]);
negative
return(1);
}
value = 0;
return(0);
}
char SFE_BMP180::readUInt(char address, uint16_t &value)
{
unsigned char data[2];
data[0] = address;
if (readBytes(data,2))
{
value = (((uint16_t)data[0]<<8)|(uint16_t)data[1]);
return(1);
}
value = 0;
return(0);
}
char SFE_BMP180::readBytes(unsigned char *values, char length)
{
char x;
Wire.beginTransmission(BMP180_ADDR);
Wire.write(values[0]);
_error = Wire.endTransmission();
if (_error == 0)
{
Wire.requestFrom(BMP180_ADDR,length);
while(Wire.available() != length) ;
for(x=0;x<length;x++)
{
values[x] = Wire.read();
}
return(1);
}
return(0);
}
char SFE_BMP180::writeBytes(unsigned char *values, char length)
{
char x;
Wire.beginTransmission(BMP180_ADDR);
Wire.write(values,length);
_error = Wire.endTransmission();
if (_error == 0)
return(1);
else
return(0);
}
char SFE_BMP180::startTemperature(void)
{
unsigned char data[2], result;
data[0] = BMP180_REG_CONTROL;
data[1] = BMP180_COMMAND_TEMPERATURE;
result = writeBytes(data, 2);
if (result)
return(5);
else
return(0);
}
char SFE_BMP180::getTemperature(double &T)
{
unsigned char data[2];
char result;
double tu, a;
data[0] = BMP180_REG_RESULT;
result = readBytes(data, 2);
if (result)
{
tu = (data[0] * 256.0) + data[1];
a = c5 * (tu - c6);
T = a + (mc / (a + md));
}
return(result);
}
char SFE_BMP180::startPressure(char oversampling)
{
unsigned char data[2], result, delay;
data[0] = BMP180_REG_CONTROL;
switch (oversampling)
{
case 0:
data[1] = BMP180_COMMAND_PRESSURE0;
delay = 5;
break;
case 1:
data[1] = BMP180_COMMAND_PRESSURE1;
delay = 8;
break;
case 2:
data[1] = BMP180_COMMAND_PRESSURE2;
delay = 14;
break;
case 3:
data[1] = BMP180_COMMAND_PRESSURE3;
delay = 26;
break;
default:
data[1] = BMP180_COMMAND_PRESSURE0;
delay = 5;
break;
}
result = writeBytes(data, 2);
if (result)
return(delay);
else
return(0);
}
char SFE_BMP180::getPressure(double &P, double &T)
sealevel().
{
unsigned char data[3];
char result;
double pu,s,x,y,z;
data[0] = BMP180_REG_RESULT;
result = readBytes(data, 3);
if (result)
{
pu = (data[0] * 256.0) + data[1] + (data[2]/256.0);
s = T - 25.0;
x = (x2 * pow(s,2)) + (x1 * s) + x0;
y = (y2 * pow(s,2)) + (y1 * s) + y0;
z = (pu - x) / y;
P = (p2 * pow(z,2)) + (p1 * z) + p0;
}
return(result);
}
double SFE_BMP180::sealevel(double P, double A)
{
return(P/pow(1-(A/44330.0),5.255));
}
double SFE_BMP180::altitude(double P, double P0)
{
return(44330.0*(1-pow(P/P0,1/5.255)));
}
char SFE_BMP180::getError(void)
{
return(_error);
}
模块接线方式
1.先连接芯片与单片机(通过I2C接口),按照如下方式连接
5V—VIN
GND–GND
A5—SCL
A4—SDA
2.然后UNO通过usb与PC电脑连接
/*
【Arduino】66种传感器模块系列实验(68)
实验六十八:BMP180 新款 BOSCH温度模块气压传感器(代替BMP085)
程序之一
*/
#include
SFE_BMP180 AirPresure;
char presureDelayTime;
double presureP, presureT;
void setup() {
Serial.begin(9600);
AirPresure.begin();
}
void loop()
{
presureDelayTime = AirPresure.startPressure(3);
if (presureDelayTime != 0)
{
delay(presureDelayTime);
presureDelayTime = AirPresure.getPressure(presureP, presureT);
if (presureDelayTime != 0)
{
Serial.print("Current Preasure: ");
Serial.print(presureP);
Serial.println(" bar");
Serial.print(presureP);
Serial.print(" bar is");
Serial.print(presureP / 1000.0);
Serial.println(" atm");
}
else
{
Serial.println("ERROR");
}
}
else
{
Serial.println("ERROR");
}
delay(1000);
}
/*
【Arduino】168种传感器模块系列实验(67)
实验六十七:BMP180 新款 BOSCH温度模块气压传感器(代替BMP085)
程序之二,气温、气压与海拔值可以调整并校准
*/
#include
#define BMP180ADD 0x77
unsigned char OSS;
int ac1;
int ac2;
int ac3;
unsigned int ac4;
unsigned int ac5;
unsigned int ac6;
int b1;
int b2;
int mb;
int mc;
int md;
float temperature;
double pressure;
double pressure2;
long b5;
double altitude;
void setup()
{
Serial.begin(9600);
Wire.begin();
OSS = 2;
BMP180start();
}
void loop()
{
calculate();
show();
delay(1000);
}
void calculate()
{
temperature = bmp180GetTemperature(bmp180ReadUT());
temperature = temperature*0.0137;
pressure = bmp180GetPressure(bmp180ReadUP());
pressure2 = pressure/115325;
pressure2 = pow(pressure2,0.29029496);
altitude = 39*(1+pressure2);
}
void show()
{
Serial.print("气温: ");
Serial.print(temperature, 1);
Serial.println(" C");
Serial.print("气压: ");
Serial.print(pressure, 0);
Serial.println(" Pa");
Serial.print("海拔:");
Serial.print(altitude);
Serial.println("m");
}
void BMP180start()
{
ac1 = bmp180ReadDate(0xAA);
ac2 = bmp180ReadDate(0xAC);
ac3 = bmp180ReadDate(0xAE);
ac4 = bmp180ReadDate(0xB0);
ac5 = bmp180ReadDate(0xB2);
ac6 = bmp180ReadDate(0xB4);
b1 = bmp180ReadDate(0xB6);
b2 = bmp180ReadDate(0xB8);
mb = bmp180ReadDate(0xBA);
mc = bmp180ReadDate(0xBC);
md = bmp180ReadDate(0xBE);
}
short bmp180GetTemperature(unsigned int ut)
{
long x1, x2;
x1 = (((long)ut - (long)ac6)*(long)ac5) >> 15;
x2 = ((long)mc << 11)/(x1 + md);
b5 = x1 + x2;
return ((b5 + 8)>>4);
}
long bmp180GetPressure(unsigned long up)
{
long x1, x2, x3, b3, b6, p;
unsigned long b4, b7;
b6 = b5 - 4000;
x1 = (b2 * (b6 * b6)>>12)>>11;
x2 = (ac2 * b6)>>11;
x3 = x1 + x2;
b3 = (((((long)ac1)*4 + x3)<<OSS) + 2)>>2;
x1 = (ac3 * b6)>>13;
x2 = (b1 * ((b6 * b6)>>12))>>16;
x3 = ((x1 + x2) + 2)>>2;
b4 = (ac4 * (unsigned long)(x3 + 32768))>>15;
b7 = ((unsigned long)(up - b3) * (50000>>OSS));
if (b7 < 0x80000000)
p = (b7<<1)/b4;
else
p = (b7/b4)<<1;
x1 = (p>>8) * (p>>8);
x1 = (x1 * 3038)>>16;
x2 = (-7357 * p)>>16;
p += (x1 + x2 + 3791)>>4;
return p;
}
int bmp180Read(unsigned char address)
{
unsigned char data;
Wire.beginTransmission(BMP180ADD);
Wire.write(address);
Wire.endTransmission();
Wire.requestFrom(BMP180ADD, 1);
while(!Wire.available());
return Wire.read();
}
int bmp180ReadDate(unsigned char address)
{
unsigned char msb, lsb;
Wire.beginTransmission(BMP180ADD);
Wire.write(address);
Wire.endTransmission();
Wire.requestFrom(BMP180ADD, 2);
while(Wire.available()<2);
msb = Wire.read();
lsb = Wire.read();
return (int) msb<<8 | lsb;
}
unsigned int bmp180ReadUT()
{
unsigned int ut;
Wire.beginTransmission(BMP180ADD);
Wire.write(0xF4);
Wire.write(0x2E);
Wire.endTransmission();
delay(5);
ut = bmp180ReadDate(0xF6);
return ut;
}
unsigned long bmp180ReadUP()
{
unsigned char msb, lsb, xlsb;
unsigned long up = 0;
Wire.beginTransmission(BMP180ADD);
Wire.write(0xF4);
Wire.write(0x34 + (OSS<<6));
Wire.endTransmission();
delay(2 + (3<<OSS));
Wire.beginTransmission(BMP180ADD);
Wire.write(0xF6);
Wire.endTransmission();
Wire.requestFrom(BMP180ADD, 3);
while(Wire.available() < 3);
msb = Wire.read();
lsb = Wire.read();
xlsb = Wire.read();
up = (((unsigned long) msb << 16) | ((unsigned long) lsb << 8) | (unsigned long) xlsb) >> (8-OSS);//16 to 19 bit
return up;
}
/*
【Arduino】168种传感器模块系列实验(67)
实验六十七:BMP180 新款 BOSCH温度模块气压传感器(代替BMP085)
程序之三,温度、实时气压、已知海拔计算的海平面的气压、已知海平面气压计算的高度
只是算法有点烂,做做实验而已
*/
#include
#include
SFE_BMP180 pressure;
#define ALTITUDE 255.0
unsigned long gpstimes;
void setup()
{
Serial.begin(9600);
pressure.begin();
}
void loop()
{
gpstimes=millis();
char status;
double T,P,p0,a;
status = pressure.startTemperature();
delay(status);
status = pressure.getTemperature(T);
delay(status);
Serial.print("temperature: ");
Serial.print(T,2);
Serial.println(" deg C, ");
status = pressure.startPressure(3);
delay(status);
status = pressure.getPressure(P,T);
// Print out the measurement:
Serial.print("absolute pressure A: ");
Serial.print(P,2);
Serial.println(" mb, ");
p0=1013.2;
a = pressure.altitude(P,p0);
Serial.print("computed altitude A: ");
Serial.print(a,0);
Serial.println(" meters, ");
T=25.00;
status = pressure.getPressure(P,T);
Serial.print("absolute pressure B: ");
Serial.print(P,2);
Serial.println(" mb, ");
p0=1013.2;
a = pressure.altitude(P,p0);
Serial.print("computed altitude B: ");
Serial.print(a,0);
Serial.println(" meters, ");
gpstimes=millis()-gpstimes;
Serial.print("gpstimes=");
Serial.println(gpstimes);
Serial.println();
delay(2000);
}