#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
#define WIFI_CHANNEL 6
#include <WiFi.h>
#include "secrets.h"
#include "ThingSpeak.h" // always include thingspeak header file after other header files and custom macros
#include "DHTesp.h"
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(128, 64, &Wire, OLED_RESET);

#define SECRET_CH_ID 3195905			// replace 0000000 with your channel number
#define SECRET_WRITE_APIKEY "VQIDLE7O9AO7A55T"   // replace XYZ with your channel write API Key
 
int keyIndex = 0;            // your network key Index number (needed only for WEP)
WiFiClient  client;
unsigned long myChannelNumber = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;
const int DHT_PIN = 19;

// Initialize our values
int number1 ;
int number2;
DHTesp dhtSensor;

void setup() {
  Serial.begin(115200);  //Initialize serial
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo native USB port only
  }
 
   WiFi.begin(WIFI_SSID, WIFI_PASSWORD, WIFI_CHANNEL);
  Serial.print("Connecting to WiFi ");
  Serial.print(WIFI_SSID);
  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected!");
 
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  dhtSensor.setup(DHT_PIN, DHTesp::DHT11);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3c); // Address 0x3C for 128x32
  display.display();
  ThingSpeak.begin(client);  // Initialize ThingSpeak
 
}
 
void loop() {
 // Connect or reconnect to WiFi
 
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,30);
  display.print("Temp: " + String(data.temperature, 2) + "C");
  display.setCursor(0,40);
  display.print("Humidity: " + String(data.humidity, 1) + "%");
  display.display();
  // set the fields with the values
  number1=String(data.temperature, 2).toInt();
  number2=String(data.humidity, 1).toInt();
  ThingSpeak.setField(1, number1);
  ThingSpeak.setField(2, number2);
  
 
  // write to the ThingSpeak channel
  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if(x == 200){
    Serial.println("Channel update successful.");
  }
  else{
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }
  
  // change the values
  
  delay(20000); // Wait 20 seconds to update the channel again
}