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9838| 20
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空气传感器问题 |
大家有谁玩过Sharp GP2Y1010AU0F 空气质量传感器呢？我现在遇到一个问题，我用面包板把紫外线，空气质量，温湿度，大气压传感器和uno全部连在了一起，想同时得到当前环境下的这些数据，现在问题来了，其他传感器都正常，就是空气传感得到的这行数据显示不正常，只有把独立的空气质量程序写进去，数据才能正常。。。 下面是代码，温湿度和大气压都用的I2C总线，我把他们并联起来了，没有问题。 #include <Wire.h> const int ADDR =0x40; int X0,X1,Y0,Y1,Y2,Y3; double X,Y,X_out,Y_out1,Y_out2; #define BMP180ADD 0xEE>>1 // I2C address of BMP180 //write is (0xEE) read is (0xEF) //yixiashikongqizhiliang chuanganqideshengmign int measurePin = 0; //Connect dust sensor to Arduino A0 pin //int ledPower = 2; //Connect 3 led driver pins of dust sensor to Arduino D2 int samplingTime = 280; int deltaTime = 40; int sleepTime = 9680; float voMeasured = 0; float calcVoltage = 0; float dustDensity = 0; //kongqich unsigned char OSS; /**********************MSB LSB******/ int ac1; // 0xAA 0xAB int ac2; // 0xAC 0xAD int ac3; // 0xAE 0xAE unsigned int ac4; // 0xB0 0xB1 unsigned int ac5; // 0xB2 0xB3 unsigned int ac6; // 0xB4 0xB5 int b1; // 0xB6 0xB7 int b2; // 0xB8 0xB9 int mb; // 0xBA 0xBB int mc; // 0xBC 0xBD int md; // 0xBE 0xBF float temperature; double pressure; double pressure2; long b5; double altitude; void setup() { Serial.begin(9600); Wire.begin(); OSS = 2; // Oversampling Setting 0: single 1: 2 times 2: 4 times 3: 8 times BMP180start(); delay(100); Wire.beginTransmission(ADDR); Wire.endTransmission(); pinMode(13,OUTPUT); } void loop() { //ziwaixian int sensorValue; int analogValue = analogRead(1);//connect UV sensors to Analog 0 if (analogValue<20) { sensorValue = 0; } else { sensorValue = 0.05*analogValue-1; } Serial.print("the UV Value is "); Serial.println(sensorValue);//print the value to serial //ziwaixian //wenshidu Wire.beginTransmission(ADDR); Wire.write(0xE3); //发送读温度命令 Wire.endTransmission(); Serial.print("Temp");Serial.print("\t");Serial.println("RH"); /**读取温度数据**/ digitalWrite(13,HIGH); //LED亮开始读数据 Wire.requestFrom(ADDR,2); //回传数据 if(Wire.available()<=2); { X0 = Wire.read(); X1 = Wire.read(); X0 = X0<<8; X_out = X0+X1; } /**计算并显示温度**/ X=(175.72*X_out)/65536; X=X-46.85; Serial.print(X);Serial.print("C");Serial.print("\t"); /**发送湿度测量命令**/ Wire.beginTransmission(ADDR); Wire.write(0xE5); Wire.endTransmission(); /**读取湿度数据**/ Wire.requestFrom(ADDR,2); if(Wire.available()<=2); { Y0 = Wire.read();Y2=Y0/100; Y0=Y0%100; Y1 = Wire.read(); Y_out1 = Y2*25600; Y_out2 = Y0*256+Y1; } /**计算并显示湿度**/ Y_out1 = (125*Y_out1)/65536; Y_out2 = (125*Y_out2)/65536; Y = Y_out1+Y_out2; Y=Y-6; Serial.print(Y);Serial.println("%"); digitalWrite(13,LOW); //wenshidu //kongqi delayMicroseconds(samplingTime); voMeasured = analogRead(measurePin); // read the dust value delayMicroseconds(deltaTime); //digitalWrite(ledPower,HIGH); // turn the LED off delayMicroseconds(sleepTime); // 0 - 5V mapped to 0 - 1023 integer values // recover voltage calcVoltage = voMeasured * (5.0 / 1024.0); // linear eqaution taken from http://www.howmuchsnow.com/arduino/airquality/ // Chris Nafis (c) 2012 dustDensity = 0.17 * calcVoltage - 0.1; Serial.print("Raw Signal Value (0-1023): "); Serial.print(voMeasured); Serial.print(" - Voltage: "); Serial.print(calcVoltage); Serial.print(" - Dust Density: "); Serial.println(dustDensity); // unit: mg/m3 //kongqi //daqiya calculate(); show(); //daqiya delay(5000); } /** calculate centure **/ void calculate() { temperature = bmp180GetTemperature(bmp180ReadUT()); temperature = temperature*0.1; pressure = bmp180GetPressure(bmp180ReadUP()); pressure2 = pressure/101325; pressure2 = pow(pressure2,0.19029496); altitude = 44330*(1-pressure2); //altitude = 44330*(1-(pressure/101325)^0.19029496); } /** print reslut **/ void show() { Serial.print("Temperature: "); Serial.print(temperature, 1); //10 hexadecimal Serial.println(" C"); Serial.print("Pressure: "); Serial.print(pressure, 0); //10 hexadecimal Serial.println(" Pa"); Serial.print("altitude:"); Serial.print(altitude); Serial.println("m"); } /**BMP180 satrt program**/ void BMP180start() { /*MSB*/ ac1 = bmp180ReadDate(0xAA); //get full data 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); } /***BMP180 temperature Calculate***/ short bmp180GetTemperature(unsigned int ut) { long x1, x2; x1 = (((long)ut - (long)ac6)*(long)ac5) >> 15; //x1=((ut-ac6)*ac5)/(2^15) x2 = ((long)mc << 11)/(x1 + md); //x2=(mc*2^11)/(x1+md) b5 = x1 + x2; //b5=x1+x2 return ((b5 + 8)>>4); //t=(b5+8)/(2^4) } /***BMP180 pressure Calculate***/ 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; } /*** Read 1 bytes from the BMP180 ***/ 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(); } /*** Read 2 bytes from the BMP180 ***/ 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; } /*** read uncompensated temperature value ***/ unsigned int bmp180ReadUT() { unsigned int ut; Wire.beginTransmission(BMP180ADD); Wire.write(0xF4); // Write 0x2E into Register 0xF4 Wire.write(0x2E); // This requests a temperature reading Wire.endTransmission(); delay(5); // Wait at least 4.5ms ut = bmp180ReadDate(0xF6); // read MSB from 0xF6 read LSB from (16 bit) return ut; } /*** Read uncompensated pressure value from BMP180 ***/ unsigned long bmp180ReadUP() { unsigned char msb, lsb, xlsb; unsigned long up = 0; Wire.beginTransmission(BMP180ADD); Wire.write(0xF4); // Write 0x34+(OSS<<6) into register 0xF4 Wire.write(0x34 + (OSS<<6)); // 0x34+oss*64 Wire.endTransmission(); delay(2 + (3<<OSS)); // Wait for conversion, delay time dependent on OSS Wire.beginTransmission(BMP180ADD); Wire.write(0xF6); // Read register 0xF6 (MSB), 0xF7 (LSB), and 0xF8 (XLSB) Wire.endTransmission(); Wire.requestFrom(BMP180ADD, 3); while(Wire.available() < 3); // Wait for data to become available 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; } |
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