ESP 8266,Arduino and Thingspeak

Using Arduino Programming Questions
1

i doing the project to upload sensor value to Thinkspeak,everthing is ok ,but my Thingspeak webpage not show any value??

[/#include <SoftwareSerial.h>
#include<Wire.h>
#include<Adafruit_MLX90614.h>
Adafruit_MLX90614 mlx = Adafruit_MLX90614();
float tempa=0;
float tempo=0;
SoftwareSerial espSerial =  SoftwareSerial(0,1);      // arduino RX pin=2  arduino TX pin=3    connect the arduino RX pin to esp8266 module TX pin   -  connect the arduino TX pin to esp8266 module RX pin

String apiKey = "UWGF5N4MU47TLWEF";     // replace with your channel's thingspeak WRITE API key
String ssid="Hope No DC";    // Wifi network SSID
String password ="98798798777";  // Wifi network password
boolean DEBUG=true;

//======================================================================== showResponce
void showResponce(int waitTime){
    long t=millis();
    char c;
    while (t+waitTime>millis()){
      if (espSerial.available()){
        c=espSerial.read();
        if (DEBUG) Serial.print(c);
      }
    }
                   
}

//========================================================================
boolean thingSpeakWrite(String tempStr){
  String cmd = "AT+CIPSTART=\"TCP\",\"";                  // TCP connection
  cmd += "184.106.153.149";                               // api.thingspeak.com
  cmd += "\",80";
  espSerial.println(cmd);
  if (DEBUG) Serial.println(cmd);
  if(espSerial.find("Error")){
    if (DEBUG) Serial.println("AT+CIPSTART error");
    return false;
  }
  
  
  String getStr = "GET /update?api_key=";   // prepare GET string
  getStr += apiKey;
  getStr +="&field1=";
  getStr += String(tempStr);
  //getStr +="&field2=";
 // getStr += String(value2);
  // getStr +="&field3=";
  // getStr += String(value3);
  // ...
  getStr += "\r\n\r\n";

  // send data length
  cmd = "AT+CIPSEND=";
  cmd += String(getStr.length());
  espSerial.println(cmd);
  if (DEBUG)  Serial.println(cmd);
  
  delay(100);
  if(espSerial.find(">")){
    espSerial.print(getStr);
    if (DEBUG)  Serial.print(getStr);
  }
  else{
    espSerial.println("AT+CIPCLOSE");
    // alert user
    if (DEBUG)   Serial.println("AT+CIPCLOSE");
    return false;
  }
  return true;
}
//================================================================================ setup
void setup() {                
  DEBUG=true;           // enable debug serial
  Serial.begin(9600); 
  mlx.begin(); // Start temp sensor
  
  espSerial.begin(9600);  // enable software serial
                          // Your esp8266 module's speed is probably at 115200. 
                          // For this reason the first time set the speed to 115200 or to your esp8266 configured speed 
                          // and upload. Then change to 9600 and upload again
  
  espSerial.println("AT+CIOBAUD=9600");         // set esp8266 serial speed to 9600 bps
 espSerial.println("AT+UART_CUR=9600,8,1,0,0");         // set esp8266 serial speed to 9600 bps
  
  showResponce(1000);
  
  espSerial.println("AT+RST");         // reset esp8266
  showResponce(1000);

  espSerial.println("AT+CWMODE=1");   // set esp8266 as client
  showResponce(1000);

  espSerial.println("AT+CWJAP=\""+ssid+"\",\""+password+"\"");  // set your home router SSID and password
  showResponce(5000);

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


// ====================================================================== loop
void loop() {
char buffer[10];
  // Read sensor values
   float t = mlx.readObjectTempC();
        if (isnan(t) ) {
        if (DEBUG) Serial.println("Failed to read from TEMP");
      }
      else {
          if (DEBUG)  Serial.println("Temp="+String(t)+" *C");
            String tempStr = dtostrf(t, 4, 1, buffer);
           thingSpeakWrite(tempStr);                                      // Write values to thingspeak
      }
  
    
  // thingspeak needs 15 sec delay between updates,     
  delay(20000);  
}]
2 
[/#include <SoftwareSerial.h>
#include<Wire.h>
#include<Adafruit_MLX90614.h>

Perhapsyoushouldgetanewkeyboardwithaworkingspacekey.

SoftwareSerial espSerial =  SoftwareSerial(0,1);      // arduino RX pin=2  arduino TX pin=3    connect the arduino RX pin to esp8266 module TX pin   -  connect the arduino TX pin to esp8266 module RX pin

When the code does not match the comment, the comment looks stupid. Why are you trying to do software serial on the hardware serial pins?

  Serial.begin(9600);

Why are you trying to do software serial on the hardware serial pins while also using them for hardware serial?

  getStr += String(tempStr);

Wrapping a String in a String sure looks dumb.

void loop() {
char buffer[10];
  // Read sensor values
   float t = mlx.readObjectTempC();
        if (isnan(t) ) {
        if (DEBUG) Serial.println("Failed to read from TEMP");

I see that you hired a drunken monkey to type your code for you. Really NOT a good idea. Every { goes on a new line. The Tools + Auto Format function will clear up your piss-poor indenting.

3

It's already been mentioned about pins 0 and 1 being bad choices for software serial:

SoftwareSerial espSerial =  SoftwareSerial(0,1);

The consequence is that your debug statements like:

if (DEBUG) Serial.print(c);

will also be sent to the ESP which will cause a big mess.

4

Looks like a big rewrite is on the cards... You might want to consider ditching the arduino and juat doing this native on the esp8266. Ive got similar stuff running on a 12e (dht22 sensors)