程式碼2 (透過wifi上傳至ThingSpeak)

#include <SoftwareSerial.h>

SoftwareSerial esp8266(10,11); 

#include <SPI.h>

#define LOG_PERIOD 30000  //Logging period in milliseconds, recommended value 15000-60000.

#define MAX_PERIOD 60000  //Maximum logging period without modifying this sketch

float counts;     //variable for GM Tube events

float cpm;        //variable for CPM

float multiplier;  //variable for calculation CPM in this sketch

float previousMillis;  //variable for time measurement

float usv ;  

String apiKey = ""; 

String ssid = ""; 

String password = "";

boolean DEBUG = true;

void tube_impulse(){       //subprocedure for capturing events from Geiger Kit

  counts++;

}

void showResponse(int waitTime){

    long t=millis();

    char c;

    while (t+waitTime>millis()){

      if (esp8266.available()){

        c=esp8266.read();

        if (DEBUG) Serial.print(c);

      }

    }        

}

boolean thingSpeakWrite(float value1){

  String cmd = "AT+CIPSTART=\"TCP\",\"";

  cmd += "184.106.153.149";

  cmd += "\",80";

  esp8266.println(cmd);

  if (DEBUG) Serial.println(cmd);

  if(esp8266.find("Error")){

    if (DEBUG) Serial.println("AT+CIPSTART error");

    return false;

  }

  String getStr = "GET /update?api_key="; 

  getStr +="&field1=";

  getStr += String(value1);

  getStr += "\r\n\r\n";

  cmd = "AT+CIPSEND=";

  cmd += String(getStr.length());

  esp8266.println(cmd);

  if (DEBUG)  Serial.println(cmd);

  delay(100);

  if(esp8266.find(">")){

    esp8266.print(getStr);

    if (DEBUG)  Serial.print(getStr);

  }

  else{

    esp8266.println("AT+CIPCLOSE");

    if (DEBUG)   Serial.println("AT+CIPCLOSE");

    return false;

  }

  return true;

}

void setup() {

  DEBUG=true; 

  Serial.begin(9600); 

  Serial.println("Arduino...OK");

  counts = 0;

  cpm = 0;

  attachInterrupt(0, tube_impulse, FALLING); //define external interrupts 

  esp8266.begin(115200);

  esp8266.write("AT+UART_DEF=9600,8,1,0,0\r\n");

  delay(1500);

  esp8266.begin(9600);

  Serial.println("ESP8266...OK");

  esp8266.println("AT+CWMODE=1");

  showResponse(1000);  

  esp8266.println("AT+CWJAP=\""+ssid+"\",\""+password+"\""); 

  showResponse(10000);

  if (DEBUG)  Serial.println("Setup completed");

}

void loop() {

  unsigned long currentMillis = millis();

  if(currentMillis - previousMillis > LOG_PERIOD){

    multiplier = MAX_PERIOD / (currentMillis - previousMillis);      //calculating multiplier, depend on your log period

    cpm = counts * multiplier;

    usv = cpm / 151;    // 151CPM=1uSv/h for M4011 GM Tube。

    Serial.println("Radiation= " + String(cpm) + " CPM(counts per minute)   = " + String(usv) + " µSv/h (微西弗/小時)");

    thingSpeakWrite(usv); 

    previousMillis = currentMillis;

    counts = 0;

  }

}