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

const int DHT_PIN = 14;
const int PIR_PIN = 12;
const int LDR_PIN = 13;
float LDR_OUTPUT = 0.0;

// LDR Characteristics
const float GAMMA = 0.7;
const float RL10 = 50;

bool PIR_OUTPUT;
DHTesp dhtSensor;

const char* ssid = "Wokwi-Guest";   // your network SSID (name) 
const char* password = "";   // your network password

WiFiClient  client;

unsigned long myChannelNumber = 1936337;
const char * myWriteAPIKey = "W8JGDGYNVHSDX4QM";

// Timer variables
unsigned long lastTime = 0;
unsigned long timerDelay = 30000;
void setup() {
  Serial.begin(115200);
  Serial.println("Smartest Home System");
  Serial.println("Initializing....");
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(PIR_PIN, INPUT);
  
  ThingSpeak.begin(client);  // Initialize ThingSpeak

}


void loop() {
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  
  Serial.println(" Connected!");
  PIR_OUTPUT = digitalRead(PIR_PIN);
  LDR_OUTPUT = analogRead(LDR_PIN);

  float voltage = LDR_OUTPUT / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  TempAndHumidity  data = dhtSensor.getTempAndHumidity();

  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");
  
  // set the fields with the values
    ThingSpeak.setField(1, data.temperature);
    ThingSpeak.setField(2, data.humidity);
    ThingSpeak.setField(3, PIR_OUTPUT);
    ThingSpeak.setField(4, lux);
    // ThingSpeak.setField(3, pressure);
  // Write to ThingSpeak. There are up to 8 fields in a channel, allowing you to store up to 8 different
     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));
    }
    lastTime = millis();
    WiFi.disconnect();
    delay(22000);
  }