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

const uint8_t LDR = 14;            // Define pin for LDR
const uint8_t TEMP_PIN = 34;       // Define pin for analog temperature sensor

// Define WiFi credentials
const char* ssid = "Wokwi-GUEST";  // Your network SSID (name)
const char* pass = "";             // Your network password

WiFiClient client;

// ThingSpeak channel details
unsigned long myChannelNumber = 2418295;               // Channel number taken from cloud
const char* myWriteAPIKey = "FCCIVQOAYL7Q2IXV";        // Write API key of cloud
const char* myCounterReadAPIKey = "UCRV5PQONTN6M9MF";  // Read API key from cloud

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  
  // Initialize ThingSpeak
  ThingSpeak.begin(client);
  
  // Set pin modes for various pins
  pinMode(LDR, INPUT);
  pinMode(15, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
}

void loop() {
  // Connect or reconnect to WiFi
  if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    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.");
  }

  // Read temperature from analog temperature sensor
  int temperature = analogRead(TEMP_PIN);
  float t = map(temperature, 0, 4095, 0, 100); // Convert ADC reading to temperature in Celsius

  // Read light status from LDR
  int L = digitalRead(LDR);
  
  // Set ThingSpeak fields with sensor values
  ThingSpeak.setField(1, t);
  ThingSpeak.setField(2, L);
  
  // Write to the ThingSpeak channel
  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (x == 200) {
    Serial.println("Channel update successful.");
  }

  // Control LEDs based on conditions
  digitalWrite(2, L == 0 ? HIGH : LOW); // Turn on LED if LDR reads low light

  digitalWrite(15, t >= 25 ? HIGH : LOW); // Turn on LED if temperature is higher than or equal to 25°C

  // Read and control additional fields from ThingSpeak channel
  int C = ThingSpeak.readLongField(myChannelNumber, 7, myCounterReadAPIKey);
  digitalWrite(4, C); // Control pin 4 based on ThingSpeak field value

  int D = ThingSpeak.readLongField(myChannelNumber, 8, myCounterReadAPIKey);
  digitalWrite(5, D); // Control pin 5 based on ThingSpeak field value
  
  delay(10000); // Wait for 10 seconds before updating again
}