#include <WiFi.h>
#include <WiFiClient.h>
#include <ThingSpeak.h>
#include <ESP32Servo.h>  // Use the standard Servo library compatible with ESP32
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define SECRET_SSID "Wokwi-GUEST"       // Replace with your WiFi SSID
#define SECRET_PASS ""                  // Replace with your WiFi Password
#define SECRET_CH_ID 2591486            // Replace with your channel number
#define SECRET_WRITE_APIKEY "UYPZFHSE771JQ2PB"       // Replace with your channel write API Key

char ssid[] = SECRET_SSID;   
char pass[] = SECRET_PASS;   

WiFiClient client;

unsigned long myChannelNumber = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;

int ldr, hujan;
Servo motor_1;
Servo motor_2;

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(115200);
  
  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("DTM PROJECT");
  
  // Attach servos
  motor_1.attach(25);
  motor_2.attach(26);
  
  // Connect to WiFi
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Initialize ThingSpeak
  ThingSpeak.begin(client);
}

void loop() {
  // Read sensors and map values
  ldr = map(analogRead(34), 0, 4096, 100, 0);
  hujan = map(analogRead(35), 0, 4096, 0, 100);
  
  // Update motor state based on conditions
  if (ldr < 20 || hujan > 45) {
    motor_1.write(180);
    motor_2.write(180);
    Serial.println("Motors OFF");
  } else {
    motor_1.write(0);
    motor_2.write(0);
    Serial.println("Motors ON");
  }

  // Update ThingSpeak
  ThingSpeak.writeField(myChannelNumber, 1, ldr, myWriteAPIKey);
  ThingSpeak.writeField(myChannelNumber, 2, hujan, myWriteAPIKey);
  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));
  }
  
  // Update LCD
  lcd.setCursor(0, 1);
  lcd.print("LDR: ");
  lcd.print(ldr);
  lcd.print(" Rain: ");
  lcd.print(hujan);
  
  // Simple blink effect for LCD backlight
  lcd.backlight();
  delay(50);
  lcd.noBacklight();
  delay(50);

  // Wait 15 seconds to update the channel again
  delay(15000);

  // Print the error code at the end of loop
  Serial.println("Problem updating channel. HTTP error code " + String(x));
}