esp8266 Thingspeak Demo 1

#include <SoftwareSerial.h>

SoftwareSerial esp(10, 11); // RX, TX

 char buffer[25]; // DO NOT TOUCH THIS
int proStep = 1;  // DO NOT TOUCH THIS


#define BUFFER_SIZE 512  // DO NOT TOUCH THIS
char serialbuffer[BUFFER_SIZE];  // DO NOT TOUCH THIS


void setup()
{

  Serial.begin(9600);  // DO NOT TOUCH THIS
 /*    while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }*/
    esp.begin(9600);  // DO NOT TOUCH THIS


pinMode(13, OUTPUT);
pinMode(3, OUTPUT);
}


void loop(){

sensorValue = analogRead(sensor);

 // DO NOT TOUCH THIS
int result = 0;
do {
result =  updateServer();
}while ( result == 0);

  delay(10000);

}

int updateServer(){


    String get = "GET /update?key=####KEY####&field1=";               // THE POST REQUEST ####CHANGE THIS####
                     get = get + String(sensorValue);
                     get = get + " HTTP/1.1\r\nHost: api.thingspeak.com\r\n\r\n";
                     String len =   "AT+CIPSEND=";
                     int lenght = get.length() +1;
                     len = len + lenght;

  switch (proStep){
    case 0:
    resetWifi();
    delay(7000);
    proStep++;

  break;
       case 1:
        sendD("AT+CWMODE=1");
      if (wait_for_esp_response(5000, "OK")){
      Serial.println("OK");
      proStep++;
  } else {
    Serial.println("FAIL!! Restarting...");
        delay(1000);
        proStep=0;
  }
  break;
         case 2:
  sendD("AT+CIPMUX=0");

    if (wait_for_esp_response(5000, "OK")){
  Serial.println("OK");
    proStep++;
  } else {
    Serial.println("FAIL!! Restarting...");
        delay(1000);
        proStep=0;
  }
  break;
           case 3:
  sendD("AT+CWJAP=\"SSID\",\"PASSWORD\"");       //CHANGE THIS !!!

    if (wait_for_esp_response(10000, "OK")){
  Serial.println("OK");
    proStep++;
  } else {
    Serial.println("FAIL!! Restarting...");
        delay(1000);
        proStep=0;
  }
  break;
             case 4:
  sendD("AT+CIPSTART=\"TCP\",\"184.106.153.149\",80");  // THINGSPEAK.COM IP ADDRESS
    if (wait_for_esp_response(5000, "OK")){
  Serial.println("OK");
    proStep++;
  } else {
    Serial.println("FAIL!! Restarting...");
        delay(1000);
        proStep=4;
  }
  break;
               case 5:

  sendD(len);

    if (wait_for_esp_response(5000, ">")){
  Serial.print("OK > ");
    proStep++;
  } else {
    Serial.println("FAIL!! Restarting...");
        delay(1000);
        proStep=0;
  }
  break;
   case 6:

  sendD(get);
    if (wait_for_esp_response(15000, "SEND OK")){        // MAY NEED TO REPLACE "SERVER OK" with some other message
    Serial.println("Data Inserted into database");
          proStep=0;
          return 1;
    } else {
       Serial.println("Failed");
    }
     proStep=0;
  break;
  }
   return 0;
}

void sendD(String cmd){
    Serial.print("SEND: ");
  Serial.println(cmd);
  esp.println(cmd);
}

void resetWifi(){                          // MAY NEED TO EDIT THE RESET PART
      Serial.println("Module Reset");
/*  digitalWrite(3,LOW);

  delay(100);
  digitalWrite(3,HIGH);*/
  sendD("AT+RST");
}

byte wait_for_esp_response(int timeout, char* term) {
  unsigned long t=millis();
  bool found=false;
  int i=0;
  int len=strlen(term);
  // wait for at most "timeout" milliseconds
  // or if OK\r\n is found
  while(millis()<t+timeout) {
    if(esp.available()) {
      serialbuffer[i++]=esp.read();
      if(i>=len) {
        if(strncmp(serialbuffer+i-len, term, len)==0) {
          found=true;
          break;
        }
      }
    }
  }
  serialbuffer[i]=0;
  Serial.println(serialbuffer);
  return found;
}