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

const char* ssid = "Wokwi-GUEST";
const char* pass = "";

WiFiClient client;
long myChannelNumber = 2612046; 
const char* myWriteAPIkey = "LIVSE5JDG4DTK6U7";
int statusCode;

DHTesp dhtsensor;
TempAndHumidity data;
const int dhtPin = 18;

const int triggerPin = 5;
const int echoPin = 14;

#define buzzer 5
#define tempLED 26
#define humiLED 27
#define RED 23
#define YELLOW 22
#define GREEN 21

float d;

void setup() {
    Serial.begin(115200);

    WiFi.begin(ssid, pass);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("Connected to WiFi");

    ThingSpeak.begin(client);
    dhtsensor.setup(dhtPin, DHTesp::DHT22);

    pinMode(triggerPin, OUTPUT);
    pinMode(echoPin, INPUT);
    pinMode(RED, OUTPUT);
    pinMode(YELLOW, OUTPUT);
    pinMode(GREEN, OUTPUT);
    pinMode(buzzer, OUTPUT);
    pinMode(tempLED, OUTPUT);
    pinMode(humiLED, OUTPUT);
}

long getDistance() {
    digitalWrite(triggerPin, LOW);
    delayMicroseconds(2);
    digitalWrite(triggerPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(triggerPin, LOW);
    long duration = pulseIn(echoPin, HIGH);
    long distance = duration * 0.034 / 2;
    return distance;
}

int wDistance() {
    digitalWrite(triggerPin, LOW);
    delay(10);
    digitalWrite(triggerPin, HIGH);
    delay(100);
    digitalWrite(triggerPin, LOW);
    d = pulseIn(echoPin, HIGH);
    return (d * 0.034 / 2) + 2;
}

void loop() {
    data = dhtsensor.getTempAndHumidity();
    Serial.println("Humi: " + String(data.humidity));
    Serial.println("Temp: " + String(data.temperature));
    Serial.println("------------------");

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

    statusCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIkey);
    if (statusCode == 200) {
        Serial.println("Channel updated successfully");
    } else {
        Serial.println("Problem writing data. HTTP error code: " + String(statusCode));
    }

    if (data.temperature > 30) {
        tone(buzzer, 800, 1000);
        digitalWrite(tempLED, HIGH);
    } else {
        noTone(buzzer);
        digitalWrite(tempLED, LOW);
    }

    if (data.humidity < 30) {
        tone(buzzer, 500, 1000);
        digitalWrite(humiLED, HIGH);
    } else {
        noTone(buzzer);
        digitalWrite(humiLED, LOW);
    }

    int distance = wDistance();
    Serial.print("Distance: ");
    Serial.print(String(distance));
    Serial.println(" cm");

    if (distance < 100) {
        digitalWrite(RED, HIGH);
        digitalWrite(YELLOW, LOW);
        digitalWrite(GREEN, LOW);
    } else if (distance < 200) {
        digitalWrite(RED, LOW);
        digitalWrite(YELLOW, HIGH);
        digitalWrite(GREEN, LOW);
    } else if (distance < 300) {
        digitalWrite(RED, LOW);
        digitalWrite(YELLOW, LOW);
        digitalWrite(GREEN, HIGH);
    } else {
        digitalWrite(RED, LOW);
        digitalWrite(YELLOW, LOW);
        digitalWrite(GREEN, LOW);
    }

    delay(1000); 
}