temp

#include "DHT.h"
#define DHTPIN 14     // what pin we're connected to
#define DHTTYPE DHT22   
DHT dht(DHTPIN, DHTTYPE,15);

#include <Wire.h>

#include <Adafruit_GFX.h>
#include <ESP_SSD1306.h>

#define SDAPIN  12
#define SCLPIN  05

#define ROTATION_0  0
#define ROTATION_90 1

ESP_SSD1306 display(false);   //reset disable
byte mac[] = { 0xD4, 0x28, 0xB2, 0xFF, 0xA0, 0xA1 }; // Must be unique on local network
// ThingSpeak Settings
char thingSpeakAddress[] = "api.thingspeak.com";
String writeAPIKey = "AZ7DG5H95TFK4V1E";
const int updateThingSpeakInterval = 16 * 1000;   
long lastConnectionTime = 0; 
boolean lastConnected = false;
int failedCounter = 0;

#include <ESP8266WiFi.h>

const char* ssid     = "RLIS";
const char* password = "boonchanawifi";
// Initialize Arduino Ethernet Client
WiFiClient client;


void setup() {
  Serial.begin(115200);
  Serial.println("DHTxx test!");
   Wire.begin(SDAPIN, SCLPIN);        //sda, scl
  Wire.begin();

  display.begin(SSD1306_SWITCHCAPVCC, 0x3c, false);
  display.clearDisplay();
   WiFi.begin(ssid, password);    //เชื่อมต่อ WiFi
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());


 
}
void updateThingSpeak(String tsData)
{
  if (client.connect(thingSpeakAddress, 80))
  {         
    client.print("POST /update HTTP/1.1\n");
    client.print("Host: api.thingspeak.com\n");
    client.print("Connection: close\n");
    client.print("X-THINGSPEAKAPIKEY: "+writeAPIKey+"\n");
    client.print("Content-Type: application/x-www-form-urlencoded\n");
    client.print("Content-Length: ");
    client.print(tsData.length());
    client.print("\n\n");

    client.print(tsData);
    
    lastConnectionTime = millis();
    
    if (client.connected())
    {
      Serial.println("Connecting to ThingSpeak...");
      Serial.println();
      
      failedCounter = 0;
    }
    else
    {
      failedCounter++;
  
      Serial.println("Connection to ThingSpeak failed ("+String(failedCounter, DEC)+")");   
      Serial.println();
    }
    
  }
  else
  {
    failedCounter++;
    
    Serial.println("Connection to ThingSpeak Failed ("+String(failedCounter, DEC)+")");   
    Serial.println();
    
    lastConnectionTime = millis(); 
  }
}


void loop() {
    display.clearDisplay();

   // Wait a few seconds between measurements.
  delay(2000);
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);
  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  // Compute heat index in Fahrenheit (the default)
  float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print(" *C ");
  Serial.print(f);
  Serial.print(" *F\t");
  Serial.print("Heat index: ");
  Serial.print(hic);
  Serial.print(" *C ");
  Serial.print(hif);
  Serial.println(" *F");
  
  display.setTextColor(WHITE);
  display.setTextWrap(false);

  //display.setRotation(ROTATION_90);

  display.setCursor(0, 0);
  display.print("humidity: ");
  display.print(h);
  display.print(" %\n");
  display.print("Temperature: ");
  display.print(t);
  display.print(" *C ");
  display.print(" \n");
  display.print(f);
  display.print(" *F\n");
  display.print("Heat index: ");
  display.print(hic);
  display.print(" *C ");
    display.print(" \n");

  display.print(hif);
  display.println(" *F");
  
  display.display(); 
   if(millis() - lastConnectionTime > updateThingSpeakInterval)
  {
    updateThingSpeak("field1="+String(h));
    updateThingSpeak("field2="+String(t));
  }
  
   
}