#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include "DHTesp.h"
#include "ThingSpeak.h"

const int DHT_PIN = 15;
const int LED_PIN = 13;
int pot=35;
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber =2342401 ;
const char* myApiKey = "RBFBGOVR7D51N9G5";
const char* server = "api.thingspeak.com";

DHTesp dhtSensor;
WiFiClient client;
LiquidCrystal_I2C lcd(0x27, 16, 4);

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.print("Initializing ...\n");
  delay(2000);
  lcd.clear();
  pinMode(pot,INPUT);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(LED_PIN, OUTPUT);
  Serial.println("****************** WELCOME TO THE SMART IOT WEATHER STATION ******************");
  delay(3000);
  Serial.println("Wifi Status:\n");
  Serial.println(">Connecting ...\n");

  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED){
    digitalWrite(LED_PIN, HIGH);
    delay(280);
    digitalWrite(LED_PIN, LOW);
    delay(280);
  }
  delay(1000);
  digitalWrite(LED_PIN,HIGH);
  Serial.println(">Wifi connected !");
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  Serial.println("-------------------------------------------------------");
  Serial.println("Monitoring Interface:\n");
}

void loop() {
  float pot_value=0;
  float data1;
  pot_value=analogRead(pot);
  pot_value= map(pot_value,0,4095,0,100);

  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  data1=pot_value;

  ThingSpeak.setField(1,data.temperature);
  ThingSpeak.setField(2,data.humidity);
  ThingSpeak.setField(3,data1); 
  

  
  int x = ThingSpeak.writeFields(myChannelNumber,myApiKey);
  
  Serial.println("Temperature Value: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity Value: " + String(data.humidity, 1) + "%");
  Serial.println("Potentiometer Value: "+ String(pot_value,3)+ "%");
  lcd.setCursor(0,0);
  lcd.print("Temp.(C):");
  lcd.print(data.temperature);
  lcd.setCursor(0,1);
  lcd.print("Humidity(%):");
  lcd.print(data.humidity);
  
  Serial.println("Data Upload Status:\n");

  if(x == 200){
    Serial.println(">Uploaded successfully");
  }else{
    Serial.println(">Pending... , Upload error: " + String(x));
  }
  Serial.println("-------------------------------------------------------");

  delay(2000);
}