Thingspeak Temperature Routine for DS Sensor

// www.arduinesp.com 
//
// Plot DTH11 data on thingspeak.com using an ESP8266 
// April 11 2015
// Author: Jeroen Beemster
// Website: www.arduinesp.com
 
#include <DHT.h>
#include <ESP8266WiFi.h>
#include <OneWire.h>
#include <DallasTemperature.h>
 
// replace with your channel's thingspeak API key, 
String apiKey = " XXXX ";
const char* ssid = "YYY ";
const char* password = "ZZZ ";
 
const char* server = "api.thingspeak.com";
// #define DHTPIN 2 // what pin we're connected to

// DS18B20 Setup
#define ONE_WIRE_BUS 2 // Connected to D4
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
 
//DHT dht(DHTPIN, DHT11,15);

WiFiClient client;

// DS18B20 Setup

void setup() {                
  Serial.begin(115200);
  delay(10);
  //dht.begin();
  sensors.begin();
      
  WiFi.begin(ssid, password);
  
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    
  }
  
}
 
void loop() {
   
  // float h = dht.readHumidity();
  // float t = dht.readTemperature();
  
  // Read out DS18B20
  sensors.requestTemperatures();
  float t1 = (sensors.getTempCByIndex(0));
  
  if (client.connect(server,80)) {  //   "184.106.153.149" or api.thingspeak.com
    String postStr = apiKey;
           postStr +="&field1=";
           postStr += String(t1);
           // postStr +="&field2=";
           // postStr += String(h);
           postStr += "\r\n\r\n";
 
     client.print("POST /update HTTP/1.1\n"); 
     client.print("Host: api.thingspeak.com\n"); 
     client.print("Connection: close\n"); 
     client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n"); 
     client.print("Content-Type: application/x-www-form-urlencoded\n"); 
     client.print("Content-Length: "); 
     client.print(postStr.length()); 
     client.print("\n\n"); 
     client.print(postStr);
     
     Serial.print(" Send to thingspeak ");
     Serial.println(t1);
     
  }
  client.stop();
   
  Serial.println("Waiting...");    
  // thingspeak needs minimum 15 sec delay between updates
  
  delay(57500);  
}