02-G3+NodeMCU

1.改裝PMS3003(G3)的接線

由於沒有學過做杜邦線的端子，本身也沒有材料及設備，因此採用最傳統的方式，用焊接法來製作出所要的線。

網路上有【如何製作杜邦端子（跳線）】供參

2.與NodeMCU連接(下圖接在RX、TX)，藍色的線也可以不用接到板子上

註：除NodeMCU板外，本篇的程式也都可使用在Wemos板子，Wemos的接線圖如下：

3.NodeMCU腳位圖

註：由上圖可知，有二組serial可用，分別是Serial(RXD0,TXD0)、Serial2(RXD2(GPIO13)、TXD2(GPIO15))

4.到Arduino IDE 寫程式

參考前一單元(01-G3+Uno)的程式，使用Serial2來連接G3，程式如下

#include <SoftwareSerial.h>

SoftwareSerial Serial2(13, 15); // RX2, TX2 ; D7,D8

long pmcf10=0;

long pmcf25=0;

long pmcf100=0;

long pmat10=0;

long pmat25=0;

long pmat100=0;

char buf[50];

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

Serial2.begin(9600);

}

void loop() {

// put your main code here, to run repeatedly:

int count = 0;

unsigned char c;

unsigned char high;

while (Serial2.available()) {

c = Serial2.read();

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

Serial.println("check failed");

break;

}

if(count > 15){

Serial.println("complete");

break;

}

else if(count == 4 || count == 6 || count == 8 || count == 10 || count == 12 || count == 14) high = c;

else if(count == 5){

pmcf10 = 256*high + c;

Serial.print("CF=1, PM1.0=");

Serial.print(pmcf10);

Serial.println(" ug/m3");

}

else if(count == 7){

pmcf25 = 256*high + c;

Serial.print("CF=1, PM2.5=");

Serial.print(pmcf25);

Serial.println(" ug/m3");

}

else if(count == 9){

pmcf100 = 256*high + c;

Serial.print("CF=1, PM10=");

Serial.print(pmcf100);

Serial.println(" ug/m3");

}

else if(count == 11){

pmat10 = 256*high + c;

Serial.print("atmosphere, PM1.0=");

Serial.print(pmat10);

Serial.println(" ug/m3");

}

else if(count == 13){

pmat25 = 256*high + c;

Serial.print("atmosphere, PM2.5=");

Serial.print(pmat25);

Serial.println(" ug/m3");

}

else if(count == 15){

pmat100 = 256*high + c;

Serial.print("atmosphere, PM10=");

Serial.print(pmat100);

Serial.println(" ug/m3");

}

count++;

}

while(Serial2.available()) Serial2.read();

Serial.println();

delay(5000);

}

執行結果，一直出現check failed (初步的檢測資料就出問題)，不知原因為何？如下：

為避免上面問題，直接改用Serial來傳送G3的數據，並使用LCD顯示器來顯示那6組數據~~

這邊的LCD顯示器的程式是利用 TUNIOT來寫再轉成Arduino語言(紅色字部分)

記得，上傳程式前，記得要把插在RX及TX的線先拔開，等程式上傳完畢後，再插上！

#include <SoftwareSerial.h>

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x3F,16,2);

long pmcf10=0;

long pmcf25=0;

long pmcf100=0;

long pmat10=0;

long pmat25=0;

long pmat100=0;

char buf[50];

void setup() {

// put your setup code here, to run once:

lcd.begin();

Serial.begin(9600);

//Serial1.begin(9600);

}

void loop() {

// put your main code here, to run repeatedly:

int count = 0;

unsigned char c;

unsigned char high;

while (Serial.available()) {

c = Serial.read();

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

Serial.println("check failed");

lcd.setCursor(0,0);

lcd.print(String("check failed "));

break;

}

if(count > 15){

Serial.println("complete");

break;

}

else if(count == 4 || count == 6 || count == 8 || count == 10 || count == 12 || count == 14) high = c;

else if(count == 5){

pmcf10 = 256*high + c;

Serial.print("CF=1, PM1.0=");

Serial.print(pmcf10);

Serial.println(" ug/m3");

lcd.clear();

lcd.setCursor(0,0);

lcd.print(String("CF ")+pmcf10 + String(","));

}

else if(count == 7){

pmcf25 = 256*high + c;

Serial.print("CF=1, PM2.5=");

Serial.print(pmcf25);

Serial.println(" ug/m3");

lcd.setCursor(8,0);

lcd.print(pmcf25 + String(","));

}

else if(count == 9){

pmcf100 = 256*high + c;

Serial.print("CF=1, PM10=");

Serial.print(pmcf100);

Serial.println(" ug/m3");

lcd.setCursor(12,0);

lcd.print(pmcf100);

}

else if(count == 11){

pmat10 = 256*high + c;

Serial.print("atmosphere, PM1.0=");

Serial.print(pmat10);

Serial.println(" ug/m3");

lcd.setCursor(0,1);

lcd.print(String("At ")+pmat10 + String(","));

}

else if(count == 13){

pmat25 = 256*high + c;

Serial.print("atmosphere, PM2.5=");

Serial.print(pmat25);

Serial.println(" ug/m3");

lcd.setCursor(8,1);

lcd.print(pmat25 + String(","));

}

else if(count == 15){

pmat100 = 256*high + c;

Serial.print("atmosphere, PM10=");

Serial.print(pmat100);

Serial.println(" ug/m3");

lcd.setCursor(12,1);

lcd.print(pmat100);

}

count++;

}

while(Serial.available()) Serial.read();

Serial.println();

delay(5000);

}

好像成功了！

5.加入上網功能，並將PM2.5相關數據上傳到thingspeak

先上Thingspeak網站(https://thingspeak.com/)
Thingspeak的使用，請參考 01DHT11溫濕度
一樣利用TUNIOT來寫NodeMCU的網路功能及連上Thingspeak

再將上面程式轉為Arduino語言，請參考 02TUNIOT網路應用課程，有關網路的應用如下紅色字部分
本例是將大氣環境下的pm1.0、pm2.5、pm10的值，上傳到Thingspeak去

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

#include <ESP8266WiFi.h>

#include <ESP8266HTTPClient.h>

long pmcf10=0;

long pmcf25=0;

long pmcf100=0;

long pmat10=0;

long pmat25=0;

long pmat100=0;

char buf[50];

LiquidCrystal_I2C lcd(0x3F,16,2);

WiFiClient client;

String thingSpeakAddress= "http://api.thingspeak.com/update?";

String writeAPIKey;

String tsfield1Name;

String request_string;

HTTPClient http;

void setup()

{

lcd.begin();

Serial.begin(9600);

WiFi.disconnect();

delay(3000);

lcd.setCursor(0, 0);

lcd.print("START");

WiFi.begin("Xiaomi_6F5A","12345678");

while ((!(WiFi.status() == WL_CONNECTED))){

delay(300);

lcd.setCursor(0, 1);

lcd.print("......");

}

lcd.setCursor(0, 0);

lcd.print("I am connected!");

lcd.setCursor(0, 1);

lcd.print((WiFi.localIP()));

delay(1000);

}

void loop()

{

// put your main code here, to run repeatedly:

int count = 0;

unsigned char c;

unsigned char high;

while (Serial.available()) {

c = Serial.read();

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

Serial.println("check failed");

lcd.setCursor(0,0);

lcd.print(String("check failed "));

break;

}

if(count > 15){

if (client.connect("api.thingspeak.com",80)) {

writeAPIKey = "key=P9K72NZ7VN7P7OF7";

tsfield1Name = "&field1=pmat10&field2=pmat25&field3=pmat100";

request_string = thingSpeakAddress;

request_string += "key=";

request_string += "P9K72NZ7VN7P7OF7";

request_string += "&";

request_string += "field1";

request_string += "=";

request_string += pmat10;

request_string += "&";

request_string += "field2";

request_string += "=";

request_string += pmat25;

request_string += "&";

request_string += "field3";

request_string += "=";

request_string += pmat100;

http.begin(request_string);

http.GET();

http.end();

}

Serial.println("complete");

break;

}

else if(count == 4 || count == 6 || count == 8 || count == 10 || count == 12 || count == 14) high = c;

else if(count == 5){

pmcf10 = 256*high + c;

Serial.print("CF=1, PM1.0=");

Serial.print(pmcf10);

Serial.println(" ug/m3");

lcd.clear();

lcd.setCursor(0,0);

lcd.print(String("CF ")+pmcf10 + String(","));

}

else if(count == 7){

pmcf25 = 256*high + c;

Serial.print("CF=1, PM2.5=");

Serial.print(pmcf25);

Serial.println(" ug/m3");

lcd.setCursor(8,0);

lcd.print(pmcf25 + String(","));

}

else if(count == 9){

pmcf100 = 256*high + c;

Serial.print("CF=1, PM10=");

Serial.print(pmcf100);

Serial.println(" ug/m3");

lcd.setCursor(12,0);

lcd.print(pmcf100);

}

else if(count == 11){

pmat10 = 256*high + c;

Serial.print("atmosphere, PM1.0=");

Serial.print(pmat10);

Serial.println(" ug/m3");

lcd.setCursor(0,1);

lcd.print(String("At ")+pmat10 + String(","));

}

else if(count == 13){

pmat25 = 256*high + c;

Serial.print("atmosphere, PM2.5=");

Serial.print(pmat25);

Serial.println(" ug/m3");

lcd.setCursor(8,1);

lcd.print(pmat25 + String(","));

}

else if(count == 15){

pmat100 = 256*high + c;

Serial.print("atmosphere, PM10=");

Serial.print(pmat100);

Serial.println(" ug/m3");

lcd.setCursor(12,1);

lcd.print(pmat100);

}

count++;

}

while(Serial.available()) Serial.read();

Serial.println();

delay(5000);

}

到Thingspeak網站觀看上傳結果https://thingspeak.com/channels/228017

最後再來與

行政院環境保護署－空氣品質監測網

比較看看測出來的值是否誤差很大??

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