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

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

WiFiClient client;
long myChannelNumber =2619197;
const char *myWriteAPIKey = "WH3GH364P1M6WOR0";
int statusCode;

DHTesp eg;
TempAndHumidity data;
int temp;
int hum;
int trigger = 23;
int echo = 22;
int green = 25;
int yellow = 26;
int red = 27;

void setup() {
  Serial.begin(115200);
  eg.setup(18, DHTesp::DHT22);
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(green, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(red, OUTPUT);

  // Connect to WiFi
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    WiFi.begin(ssid, pass); 
    delay(5000);
  }
  Serial.println("\nConnected.");
}

int Ultra_sonic() {
  digitalWrite(trigger, HIGH);
  delay(10); // Shorter delay for better accuracy
  digitalWrite(trigger, LOW);
  float received = pulseIn(echo, HIGH);
  float converted = (received * 0.034 / 2) + 1;
  return (int)converted;
}

void loop() {
  data = eg.getTempAndHumidity();
  int actual_distance = Ultra_sonic();
  Serial.print("Distance: ");
  Serial.println(actual_distance);

  temp = data.temperature;
  hum = data.humidity;

  if (temp < 30 && hum > 70 && actual_distance > 300 && actual_distance < 400) {
    digitalWrite(green, HIGH);
    digitalWrite(red, LOW);
    digitalWrite(yellow, LOW);
    Serial.println("Humi: " + String(hum));
    Serial.println("Temp: " + String(temp));
    noTone(13);
  } else if (temp > 30 && temp < 70 && hum > 30 && hum < 70 && actual_distance > 200 && actual_distance < 300) {
    digitalWrite(green, LOW);
    digitalWrite(yellow, HIGH);
    digitalWrite(red, LOW);
    Serial.println("Humi: " + String(hum));    
    Serial.println("Temp: " + String(temp));
    noTone(13);
  } else if (temp < 70 && hum < 30 && actual_distance < 200) {
    digitalWrite(green, LOW);
    digitalWrite(yellow, LOW);
    digitalWrite(red, HIGH);
    Serial.println("Humi: " + String(hum));
    Serial.println("Temp: " + String(temp));
    tone(13, 10000);
    delay(2000);
  } else {
    digitalWrite(green, LOW);
    digitalWrite(yellow, LOW);
    digitalWrite(red, LOW);
    Serial.println("The signals are Mismatch");
  }

  ThingSpeak.setField(1, temp);
  ThingSpeak.setField(2, hum);
  ThingSpeak.setField(3, actual_distance);

  statusCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (statusCode == 200) {
    Serial.println("Channel update successful.");
  } else {
    Serial.println("Problem Writing data. HTTP error code: " + String(statusCode));
  }

  Serial.print("Free heap: ");
  Serial.println(ESP.getFreeHeap());

  delay(2000); // Adjust as needed
}