製做隨身PM2.5空氣感測器 - 使用Arduino uno R3/OLED 0.96"顯示器/PMS5003T感測器

隨身PM2.5空氣盒子製作

接觸Arduino的時間並不長，花了很多時間在了解硬體的規格上面，
深怕一不小心，就把東西給燒了！！

結果，不出所料，燒掉了一片Arduino UNO R3開發板~

準備的材料：
1.Arduino UNO R3
2.OLED 0.96吋顯示螢幕
3.PMS5003T 氣體感測器
4.擴充板(可有可無）
5.麵包板(可有可無)

Arduino UNO R3，最普偏又好用的開發板，

因為才接觸Arduino不到兩個星期，有關網路功能，要等買到網路卡擴充板之後才能繼續了～

先把PMS5003T的線接出來，可參考了官方文件

OLED 0.96吋螢幕，小巧可愛
ＳＤＡ：Ａ４；ＳＤＬ：Ａ５

全部組起來，很簡單，並不難！

反正只要有看到ＶＣＣ，全部接到５Ｖ，
有看到ＧＮＤ，就接Ｇ或ＧＮＤ

還有，這顆螢幕，只有通電是沒有反應的，千萬不要認為壞掉了喔！

準備好了，寫程式了～～～

此份程式經過長時間除錯跟測試，應該是屬於很穏定版本了

#define OLED_EN

#if defined (OLED_EN)

#include <U8glib.h>

U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NO_ACK);

#endif

#include <SoftwareSerial.h>

SoftwareSerial mySerial(2, 3);

#define PMS_SET 4   

#define LED 13      

#if defined (OLED_EN)

 long pmat10=0;

 long pmat25=0;

 long pmat100=0;

 long pmt=0;

 long pmh=0;

 char buf[50];

 int sensorVal;

#endif

void draw() {

   u8g.setFont(u8g_font_8x13);

   u8g.drawStr(0, 10, "T=");

   u8g.setPrintPos(17, 10);

   u8g.print(int(pmt));

   u8g.drawStr(33, 10, "(C)");

   u8g.drawStr(60 ,10, "H=");

   u8g.setPrintPos(78, 10);

   u8g.print(int(pmh));

   u8g.drawStr(103, 10, "(%)");

   u8g.drawStr(0,25, "PM2.5=");

   u8g.setFont(u8g_font_fub25);

   u8g.setPrintPos(50, 40);

   u8g.print(int(pmat25));

   u8g.setFont(u8g_font_profont12);

   u8g.drawStr(0, 64, "PM1=");

   u8g.setPrintPos(25, 64);

   u8g.print(int(pmat10));    

   u8g.drawStr(60, 64, "PM10=");

   u8g.setPrintPos(92, 64);

   u8g.print(int(pmat100));

   u8g.setFont(u8g_font_5x8);

   u8g.drawStr(85, 52, "(ug/m3)");

}

void ecoMode(){

   sensorVal = digitalRead(PMS_SET);

 if (sensorVal == LOW){  

   delay(30000);

   digitalWrite(PMS_SET, HIGH);

   digitalWrite(LED, HIGH);

   delay(30000);  

     }

 else if (sensorVal == HIGH){

    digitalWrite(PMS_SET, HIGH);

   digitalWrite(LED, HIGH);

 }    

}   

void retrievepm25(){

 int count = 0;

 unsigned char c;

 unsigned char high;

 while (mySerial.available()) {

   c = mySerial.read();

   if((count==0 && c!=0x42) || (count==1 && c!=0x4d)){

     Serial.println("check failed");

     break;

   }

   if(count > 27){

     Serial.println("complete");

     break;

   }

    else if(count == 10 || count == 12 || count == 14 || count == 24 || count == 26) {

     high = c;

   }

   else if(count == 11){

     pmat10 = 256*high + c;

     Serial.print("PM1.0=");

     Serial.print(pmat10);

     Serial.println(" ug/m3");

   }

   else if(count == 13){

     pmat25 = 256*high + c;

     Serial.print("PM2.5=");

     Serial.print(pmat25);

     Serial.println(" ug/m3");

   }

   else if(count == 15){

     pmat100 = 256*high + c;

     Serial.print("PM10=");

     Serial.print(pmat100);

     Serial.println(" ug/m3");

   }

    else if(count == 25){        

     pmt = (256*high + c)/10;

     Serial.print("Temp=");

     Serial.print(pmt);

     Serial.println(" (C)");

   }

   else if(count == 27){            

     pmh = (256*high + c)/10;

     Serial.print("Humidity=");

     Serial.print(pmh);

     Serial.println(" (%)");

   }   

   count++;

 }

 while(mySerial.available()) mySerial.read();

 Serial.println();

}

void decidePM25(){

 if(pmat25 >= 40){   

    u8g.firstPage();

    do {

     draw();

     u8g.setFont(u8g_font_5x8);

     u8g.drawStr(0, 52, "(Normal Mode)");     

     } while( u8g.nextPage() );

    delay(500);

   digitalWrite(PMS_SET, HIGH);

   digitalWrite(LED, HIGH);

   sensorVal = digitalRead(PMS_SET);

   Serial.println("normalMode");

   Serial.println(sensorVal,DEC);

   delay(1500);

 }

 else {

    u8g.firstPage();

    do {

     draw();

     u8g.setFont(u8g_font_5x8);

     u8g.drawStr(0, 52, "(Economic Mode)");     

     } while( u8g.nextPage() );

   delay(500);

   digitalWrite(PMS_SET, LOW);

   digitalWrite(LED, LOW);

   sensorVal = digitalRead(PMS_SET);

   Serial.println("ecoMode");

   Serial.println(sensorVal,DEC);

 }   

   ecoMode();  

     }

void setup() {

 Serial.begin(9600);

 mySerial.begin(9600);

 pinMode(PMS_SET, OUTPUT);

 // pinMode(4,INPUT_PULLUP);

 pinMode(LED,OUTPUT);

 digitalWrite(PMS_SET, HIGH);

 for (int i = 0; i < 30; i++) {

   retrievepm25();

   delay(2000);

   u8g.firstPage();  

   do {

     draw();

     u8g.setFont(u8g_font_5x8);

     u8g.drawStr(0, 52, "(Normal)");

     } while( u8g.nextPage() );

 }

   delay(500);

}

void loop() {

 retrievepm25();

 u8g.firstPage();  

   do {

     draw();

   } while( u8g.nextPage() );

 delay(500);

 decidePM25();

}