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基于Ardunio的DHT22車內環境監測程序

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ID:137145 發表于 2017-12-19 21:32 | 只看該作者 回帖獎勵 |倒序瀏覽 |閱讀模式
基于Ardunio的車內環境監測

單片機源程序如下:
  1. #include <DHT22.h>
  2. // Only used for sprintf
  3. #include <stdio.h>
  4. #define Aout A1
  5. int led = 2;
  6. int temp = 0;
  7. // Data wire is plugged into port 7 on the Arduino
  8. // Connect a 4.7K resistor between VCC and the data pin (strong pullup)
  9. #define DHT22_PIN 7
  10. // Setup a DHT22 instance
  11. DHT22 myDHT22(DHT22_PIN);
  12. int dustPin=A0;
  13. double dustVal=0;
  14. int ledPower=22;
  15. int delayTime=280;
  16. int delayTime2=40;
  17. int offTime=9680;
  18. double getOutputV() {
  19. digitalWrite(ledPower,LOW);
  20. delayMicroseconds(delayTime);
  21. dustVal=analogRead(dustPin);
  22. delayMicroseconds(delayTime2);
  23. digitalWrite(ledPower,HIGH);
  24. delayMicroseconds(offTime);
  25.   //Arduino模擬量讀取值的范圍為0~1023,以下換算為0~5v
  26. double outputV = dustVal / 1024 * 5;
  27. return outputV;
  28. }

  30. /**
  31.    根據輸出電壓計算灰塵密度
  32. */
  33. double getDustDensity(double outputV) {
  34.   //輸出電壓和灰塵密度換算公式: ug/m3 = (V - 0.9) / 5 * 1000
  35.   double ugm3 = abs((outputV - 0.9) / 5 * 1000);
  36.   //去除檢測不到的范圍
  37.    return ugm3;
  38. }

  40. /**
  41.    根據灰塵密度計算AQI
  42.    環境空氣質量指數（AQI）技術規定（試行）](http://kjs.mep.gov.cn/hjbhbz/bzwb/dqhjbh/jcgfffbz/201203/t20120302_224166.htm
  43. */
  44. double getAQI(double ugm3) {
  45.   double aqiL = 0;
  46.   double aqiH = 0;
  47.   double bpL = 0;
  48.   double bpH = 0;
  49.   double aqi = 0;
  50.   //根據pm2.5和aqi對應關系分別計算aqi
  51.   if (ugm3 >= 0 && ugm3 <= 35) {
  52.     aqiL = 0;
  53.     aqiH = 50;
  54.     bpL = 0;
  55.     bpH = 35;
  56.   } else if (ugm3 > 35 && ugm3 <= 75) {
  57.     aqiL = 50;
  58.     aqiH = 100;
  59.     bpL = 35;
  60.     bpH = 75;
  61.   } else if (ugm3 > 75 && ugm3 <= 115) {
  62.     aqiL = 100;
  63.     aqiH = 150;
  64.     bpL = 75;
  65.     bpH = 115;
  66.   } else if (ugm3 > 115 && ugm3 <= 150) {
  67.     aqiL = 150;
  68.     aqiH = 200;
  69.     bpL = 115;
  70.     bpH = 150;
  71.   } else if (ugm3 > 150 && ugm3 <= 250) {
  72.     aqiL = 200;
  73.     aqiH = 300;
  74.     bpL = 150;
  75.     bpH = 250;
  76.   } else if (ugm3 > 250 && ugm3 <= 350) {
  77.     aqiL = 300;
  78.     aqiH = 400;
  79.     bpL = 250;
  80.     bpH = 350;
  81.   } else if (ugm3 > 350) {
  82.     aqiL = 400;
  83.     aqiH = 500;
  84.     bpL = 350;
  85.     bpH = 500;
  86.   }
  87.   //公式aqi = (aqiH - aqiL) / (bpH - bpL) * (desity - bpL) + aqiL;
  88.   aqi = (aqiH - aqiL) / (bpH - bpL) * (ugm3 - bpL) + aqiL;
  89.   return aqi;
  90. }

  92. /**
  93.    根據aqi獲取級別描述
  94. */
  95. String getGradeInfo(double aqi) {
  96.   String gradeInfo;
  97.   if (aqi >= 0 && aqi <= 50) {
  98.     gradeInfo = String("Perfect");
  99.   } else if (aqi > 50 && aqi <= 100) {
  100.     gradeInfo = String("Good");
  101.   } else if (aqi > 100 && aqi <= 150) {
  102.     gradeInfo = String("Mild polluted");
  103.   } else if (aqi > 150 && aqi <= 200) {
  104.     gradeInfo = String("Medium polluted");
  105.   } else if (aqi > 200 && aqi <= 300) {
  106.     gradeInfo = String("Heavily polluted");
  107.   } else if (aqi > 300 && aqi <= 500) {
  108.     gradeInfo = String("Severely polluted");
  109.   } else {
  110.     gradeInfo = String("Broken roof!!!");
  111.   }
  112.   return gradeInfo;
  113. }
  114. /*
  115. LCD  Arduino
  116. PIN1 = GND
  117. PIN2 = 5V
  118. RS(CS) = 8;
  119. RW(SID)= 9;
  120. EN(CLK) = 3;
  121. PIN15 PSB = GND;
  122. */
  123. #include "LCD12864RSPI.h"
  124. #define AR_SIZE( a ) sizeof( a ) / sizeof( a[0] )
  125. unsigned  char msg1[]={0xCA, 0xAA,0xB6, 0xC8}; //濕度
  126. unsigned char msg2[]={ 0xCE, 0xC2, 0xB6, 0xC8};  //溫度
  127. unsigned char msg3[]={ 0xD3, 0xD0, 0xBA, 0xA6,0xC6,0xF8,0xCC,0xE5,0xC5,0xA8,0xB6,0xC8,0xB9,
  128.       0xFD,0xB8,0xDF};
  129.   unsigned char msg4[]={ 0xC7, 0xEB, 0xB1, 0xA3,0xB3,0xD6,0xBF,0xD5,0xC6,0xF8,0xB3,0xA9,0xCD,
  130.       0xA8,0xBB, 0xF2,};
  131.   unsigned char msg5[]={ 0xBD, 0xF8,0xD0,0xD0,0xB7,0xC0,0xBB,0xA4};
  132. unsigned char msg6[]="AQI:";  
  133. // unsigned char msg7[]="PM2.5";
  134. unsigned char msg8[]={ 0xC7,0xD7,0xA3,0xAC,0xBB,0xB6,0xD3,0xAD,0xC4,0xFA,0xCA,0xB9,0xD3,
  135.       0xC3,0xA3, 0xA1};
  136. unsigned char msg9[]={ 0xD3,0xC5};
  137. unsigned char msg10[]={ 0xC1,0xBC};
  138. unsigned char msg11[]={ 0xC7,0xE1,0xB6,0xC8,0xCE,0xDB,0xC8,0xBE};
  139. unsigned char msg12[]={ 0xD6,0xD0,0xB6,0xC8,0xCE,0xDB,0xC8,0xBE};
  140. unsigned char msg13[]={ 0xD6,0xD8,0xB6,0xC8,0xCE,0xDB,0xC8,0xBE};
  141. unsigned char msg16[]={ 0xD1,0xCF,0xD6,0xD8,0xCE,0xDB,0xC8,0xBE};
  142. unsigned char msg14[]={ 0xBC,0xEC,0xB2,0xE2,0xB5,0xBD,0xD3,0xD0,0xBA,0xA6,0xC6,0xF8,0xCC,
  143.       0xE5,0xD4, 0xDA};
  144. unsigned char msg15[]={ 0xB0,0xB2,0xC8,0xAB,0xB7,0xB6,0xCE,0xA7,0xC4,0xDA,0xA3,0xA1};
  145.       unsigned char logo0[]={
  146.       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  147.       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  148.       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  149.       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  150.       0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xFF,
  151.       0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  152.       0x00,0x00,0x00,0x00,0x00,0x00,0x1F,0xFF,
  153.       0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  154.       0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,
  155.       0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  156.       0x00,0x00,0x00,0x00,0x00,0x03,0xFE,0x00,
  157.       0x7F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,
  158.       0x00,0x00,0x00,0x00,0x00,0x0F,0xF0,0x00,
  159.       0x0F,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,
  160.       0x00,0x00,0x00,0x00,0x00,0x1F,0x80,0x00,
  161.       0x01,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,
  162.       0x00,0x00,0x00,0x00,0x00,0x3E,0x00,0x00,
  163.       0x00,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,
  164.       0x00,0x00,0x00,0x00,0x00,0xF8,0x00,0x00,
  165.       0x00,0x1F,0x00,0x00,0x00,0x00,0x00,0x00,
  166.       0x00,0x00,0x00,0x00,0x01,0xF0,0x00,0x00,
  167.       0x00,0x0F,0x80,0x00,0x00,0x00,0x00,0x00,
  168.       0x00,0x00,0x00,0x00,0x03,0xE0,0x00,0x00,
  169.       0x00,0x07,0xC0,0x00,0x00,0x00,0x00,0x00,
  170.       0x00,0x00,0x00,0x00,0x07,0xC0,0x00,0x00,
  171.       0x00,0x01,0xE0,0x00,0x00,0x00,0x00,0x00,
  172.       0x00,0x00,0x00,0x00,0x07,0x80,0x00,0x00,
  173.       0x00,0x00,0xE0,0x00,0x00,0x00,0x00,0x00,
  174.       0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,
  175.       0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x00,
  176.       0x00,0x00,0x00,0x00,0x1E,0x00,0x00,0x00,
  177.       0x00,0x00,0x78,0x00,0x00,0x00,0x00,0x00,
  178.       0x00,0x00,0x00,0x00,0x3C,0x00,0x00,0x00,
  179.       0x00,0x00,0x3C,0x00,0x00,0x00,0x00,0x00,
  180.       0x00,0x00,0x00,0x00,0x38,0x00,0x40,0x00,
  181.       0x00,0x80,0x1C,0x00,0x00,0x00,0x00,0x00,
  182.       0x00,0x00,0x00,0x00,0x78,0x03,0xF8,0x00,
  183.       0x07,0xF0,0x1E,0x00,0x00,0x00,0x00,0x00,
  184.       0x00,0x00,0x00,0x00,0x70,0x07,0xFE,0x00,
  185.       0x0F,0xFC,0x0E,0x00,0x00,0x00,0x00,0x00,
  186.       0x00,0x00,0x00,0x00,0xF0,0x1F,0xBF,0x00,
  187.       0x3F,0x7E,0x0F,0x00,0x00,0x00,0x00,0x00,
  188.       0x00,0x00,0x00,0x00,0xE0,0x3E,0x0F,0x80,
  189.       0x7C,0x1F,0x07,0x00,0x00,0x00,0x00,0x00,
  190.       0x00,0x00,0x00,0x00,0xE0,0x7C,0x07,0xC0,
  191.       0xF8,0x0F,0x87,0x00,0x00,0x00,0x00,0x00,
  192.       0x00,0x00,0x00,0x01,0xE0,0xF8,0x01,0xE1,
  193.       0xF0,0x03,0xC3,0x80,0x00,0x00,0x00,0x00,
  194.       0x00,0x00,0x00,0x01,0xC0,0xF0,0x01,0xE1,
  195.       0xE0,0x03,0xC3,0x80,0x00,0x00,0x00,0x00,
  196.       0x00,0x00,0x00,0x01,0xC0,0xE0,0x00,0xE1,
  197.       0xC0,0x01,0xC3,0x80,0x00,0x00,0x00,0x00,
  198.       0x00,0x00,0x00,0x01,0xC0,0x00,0x00,0x00,
  199.       0x00,0x00,0x03,0x80,0x00,0x00,0x00,0x00,
  200.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  201.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  202.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  203.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  204.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  205.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  206.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  207.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  208.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  209.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  210.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  211.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  212.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  213.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  214.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  215.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  216.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  217.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  218.       0x00,0x00,0x00,0x03,0x80,0x00,0x00,0x00,
  219.       0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,
  220.       0x00,0x00,0x00,0x01,0xC0,0x00,0x00,0x00,
  221.       0x00,0x00,0x01,0x80,0x00,0x00,0x00,0x00,
  222.       0x00,0x00,0x00,0x01,0xC0,0x00,0x00,0x00,
  223.       0x00,0x00,0x03,0x80,0x00,0x00,0x00,0x00,
  224.       0x00,0x00,0x00,0x01,0xC0,0x00,0x00,0x00,
  225.       0x00,0x00,0x03,0x80,0x00,0x00,0x00,0x00,
  226.       0x00,0x00,0x00,0x01,0xE0,0x00,0x00,0x00,
  227.       0x00,0x00,0x03,0x80,0x00,0x00,0x00,0x00,
  228.       0x00,0x00,0x00,0x00,0xE0,0x00,0x00,0x00,
  229.       0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,
  230.       0x00,0x00,0x00,0x00,0xE0,0x00,0x00,0x00,
  231.       0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,
  232.       0x00,0x00,0x00,0x00,0xF0,0x00,0x0C,0x00,
  233.       0x0C,0x00,0x0F,0x00,0x00,0x00,0x00,0x00,
  234.       0x00,0x00,0x00,0x00,0x70,0x00,0x1E,0x00,
  235.       0x1E,0x00,0x0E,0x00,0x00,0x00,0x00,0x00,
  236.       0x00,0x00,0x00,0x00,0x78,0x00,0x1F,0x00,
  237.       0x3E,0x00,0x1E,0x00,0x00,0x00,0x00,0x00,
  238.       0x00,0x00,0x00,0x00,0x38,0x00,0x07,0x80,
  239.       0xF8,0x00,0x1C,0x00,0x00,0x00,0x00,0x00,
  240.       0x00,0x00,0x00,0x00,0x3C,0x00,0x03,0xE1,
  241.       0xF0,0x00,0x3C,0x00,0x00,0x00,0x00,0x00,
  242.       0x00,0x00,0x00,0x00,0x1E,0x00,0x01,0xFF,
  243.       0xE0,0x00,0x78,0x00,0x00,0x00,0x00,0x00,
  244.       0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0xFF,
  245.       0x80,0x00,0xF0,0x00,0x00,0x00,0x00,0x00,
  246.       0x00,0x00,0x00,0x00,0x07,0x00,0x00,0x3F,
  247.       0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x00,
  248.       0x00,0x00,0x00,0x00,0x07,0x80,0x00,0x00,
  249.       0x00,0x01,0xE0,0x00,0x00,0x00,0x00,0x00,
  250.       0x00,0x00,0x00,0x00,0x03,0xE0,0x00,0x00,
  251.       0x00,0x07,0xC0,0x00,0x00,0x00,0x00,0x00,
  252.       0x00,0x00,0x00,0x00,0x01,0xF0,0x00,0x00,
  253.       0x00,0x0F,0x80,0x00,0x00,0x00,0x00,0x00,
  254.       0x00,0x00,0x00,0x00,0x00,0xF8,0x00,0x00,
  255.       0x00,0x1F,0x00,0x00,0x00,0x00,0x00,0x00,
  256.       0x00,0x00,0x00,0x00,0x00,0x3E,0x00,0x00,
  257.       0x00,0x7E,0x00,0x00,0x00,0x00,0x00,0x00,
  258.       0x00,0x00,0x00,0x00,0x00,0x1F,0x80,0x00,
  259.       0x01,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,
  260.       0x00,0x00,0x00,0x00,0x00,0x0F,0xE0,0x00,
  261.       0x07,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,
  262.       0x00,0x00,0x00,0x00,0x00,0x03,0xFE,0x00,
  263.       0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,
  264.       0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,
  265.       0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  266.       0x00,0x00,0x00,0x00,0x00,0x00,0x1F,0xFF,
  267.       0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  268.       0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xFF,
  269.       0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  270.       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  271.       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  272.       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  273.       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
  274. };
  275. void s_wsd(int r,int c)//在12864的X，Y坐標點顯示Dht11的溫度和濕度
  276. {
  277.   char tws[16];
  278.   myDHT22.readData();
  279.   snprintf(tws, sizeof(tws),"%i.%01hioC  %i.%01i%%RH",myDHT22.getTemperatureCInt()/10, abs(myDHT22.getTemperatureCInt()%10),myDHT22.getHumidityInt()/10, myDHT22.getHumidityInt()%10);
  280.   LCDA.DisplayString(r,c,(unsigned char *)tws,sizeof(tws));
  281. }
  282. void g_wsd(int x,int y)
  283. {
  284.   char buf[14];
  285.   double outputV = getOutputV();
  286.   double ugm3 = getDustDensity(outputV);
  287.   double aqi = getAQI(ugm3);
  288.   int ugm31=ugm3;
  289.    int aqi1=aqi;

  291.   snprintf(buf, sizeof(buf),"PM2.5:%3iugm3",ugm31);
  292.   LCDA.DisplayString(x,y,(unsigned char *)buf,sizeof(buf));
  293. }

  295. void setup()
  296. {LCDA.Initialise(); // 屏幕初始化
  297. delay(100);
  298. LCDA.DisplayString(1,0,msg8,sizeof(msg8));
  299. delay(2000);
  300. LCDA.CLEAR();//清屏
  301. delay(100);
  302. LCDA.DrawFullScreen(logo0);
  303. delay(2000);
  304. LCDA.CLEAR();//清屏
  305. delay(100);
  306.   // start serial port
  307.   Serial.begin(9600);
  308.   Serial.println("DHT22 Library Demo");
  309.    pinMode(Aout, INPUT);
  310.   pinMode(led,OUTPUT);
  311. pinMode(ledPower,OUTPUT);
  312.   pinMode(dustPin, INPUT);
  313.   }

  315. void loop()
  316. {
  317.   LCDA.CLEAR();//清屏
  318.   delay(100);
  319.   DHT22_ERROR_t errorCode;
  320.   delay(100);
  321.   Serial.print("Requesting data...");
  322.   temp = analogRead(Aout);
  323.   Serial.print("CO:  ");
  324.   Serial.println(temp);
  325.   if((100<temp)&&(temp<=250) )
  326. {
  327. digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  328.      // wait for a second
  329. LCDA.DisplayString(0,0,msg3,sizeof(msg3));   
  330. LCDA.DisplayString(1,0,msg4,sizeof(msg4));   
  331.   LCDA.DisplayString(2,0,msg5,sizeof(msg5));
  332. delay(3000);
  333. digitalWrite(led, LOW);
  334. LCDA.CLEAR();//清屏
  335. }
  336. if( temp>250)
  337. {delay(100);
  338. digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  339.      // wait for a second
  340. LCDA.DisplayString(0,0,msg3,sizeof(msg3));   
  341. LCDA.DisplayString(1,0,msg4,sizeof(msg4));   
  342.   LCDA.DisplayString(2,0,msg5,sizeof(msg5));
  343. delay(4000);
  344. //LCDA.CLEAR();//清屏
  345. }

  347. if(temp<=100)
  348. {
  349. digitalWrite(led, LOW);// turn the LED on (HIGH is the voltage level)
  350. LCDA.CLEAR();//清屏
  351. delay(200);
  352. LCDA.DisplayString(0,0,msg14,sizeof(msg14));
  353. LCDA.DisplayString(1,0,msg15,sizeof(msg15));   
  354.   delay(3000);
  355. LCDA.CLEAR();//清屏
  356. }
  357. double outputV = getOutputV(); //采樣獲取輸出電壓
  358.   double ugm3 = getDustDensity(outputV); //計算灰塵濃度
  359.   double aqi = getAQI(ugm3); //計算aqi
  360.   String gradeInfo = getGradeInfo(aqi); //計算級別
  361. Serial.print("dianya  ");
  362. Serial.println(outputV);
  363. Serial.print("pm2.5  ");
  364. Serial.println(ugm3);
  365. Serial.print("AQI  ");
  366. Serial.println(aqi);
  367. Serial.print("dengji  ");
  368. Serial.println(getGradeInfo(aqi));
  369. delay(100);  
  370. ……………………

  372. …………限于本文篇幅 余下代碼請從51黑下載附件…………
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