#include <WiFi.h>
#include <ThingSpeak.h>
#include "DHTesp.h"

#include <LiquidCrystal_I2C.h>
DHTesp dhtSensor;
TempAndHumidity data;
int data1;
int data2;
int data3;
int lcdColumns = 20;
int lcdRows = 4;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows); 
const int DHT_PIN = 15; //always use 15
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2234328;
const char * myWriteAPIKey = "GHIZ6O3ZL2ZFBCCY";
int statusCode;
void setup() 
{
  lcd.init();                  
  lcd.backlight();
Serial.begin(9600);
lcd.setCursor(0,1);
lcd.print("     KONGUNADU      ");
lcd.setCursor(0,2);
lcd.print(" POLYTECHNIC COLLEGE");
delay(5000);
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" IOT BASED WEATHER ");
lcd.setCursor(0,1);
lcd.print(" MONITORING SYSTEM ");
lcd.setCursor(0,2);
lcd.print("     USING ESP32   ");
lcd.setCursor(0,3);
lcd.print("     CONTROLLER    ");
delay(8000);
lcd.clear();
pinMode(19, INPUT);
Serial.begin(115200);
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}
void loop() 
{

data = dhtSensor.getTempAndHumidity();
data1=digitalRead(19);
data2=analogRead(33);
delay(100);
data3=analogRead(33);
lcd.setCursor(0,0);
lcd.print("Humi: " + String(data.humidity, 1));
lcd.setCursor(0,1);
lcd.print("Temp: " + String(data.temperature, 2));
//lcd.setCursor(0,2);
//lcd.print("Rain: " + String(data1, 3));
lcd.setCursor(0,3);
lcd.print("current: " + String(data2, 4));
lcd.setCursor(0,2);
lcd.print("voltage: " + String(data3, 5));

if(WiFi.status() != WL_CONNECTED)
{
Serial.print("Attempting to connect");
while(WiFi.status() != WL_CONNECTED)
{
WiFi.begin(ssid, pass); // Connect to WPA/WPA2 network. Change
//this line if using open or WEP network
Serial.print(".");
delay(5000);
}
Serial.println("\nConnected.");
}
Serial.println("Humi: " + String(data.humidity, 1));
Serial.println("Temp: " + String(data.temperature, 2));
Serial.println("Rain: " + String(data1, 3));
Serial.println("Current: " + String(data2, 4));
Serial.println("voltage: " + String(data2, 5));
Serial.println("-----------");
ThingSpeak.setField(2, data.humidity);
ThingSpeak.setField(1, data.temperature);
ThingSpeak.setField(3, data1);
ThingSpeak.setField(4, data2);
ThingSpeak.setField(5, data3);
statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
if(statusCode == 200) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}
delay(500); // data to be uploaded every 15secs
}