#define BLYNK_TEMPLATE_ID "TMPL6o3Xlg7q1"
#define BLYNK_TEMPLATE_NAME "Proyek Smart Home Menggunakan Wokwi dan Blynk"
#define BLYNK_AUTH_TOKEN "9XCXQ1SHYkCkwQET5leRdUNZH-rZ3WlE"
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>
// WiFi credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";
// DHT sensor
#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
// LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);
// Potensiometer (simulasi sensor gas dan api)
#define GASPIN 34
#define FLAMEPIN 35
// Relay pin
#define RELAYPIN 13
// Speaker dan LED
#define SPEAKERPIN 32
#define LED_INDICATOR_PIN 25
#define LED_LAMP1_PIN 26
#define LED_LAMP2_PIN 27
// Blynk virtual pins
#define VPIN_TEMPERATURE V1
#define VPIN_HUMIDITY V2
#define VPIN_GAS V3
#define VPIN_FLAME V4
#define VPIN_RELAY V5
#define VPIN_LAMP1 V6
#define VPIN_LAMP2 V7
#define VPIN_ALARM V8
void setup() {
Serial.begin(115200);
dht.begin();
pinMode(RELAYPIN, OUTPUT);
pinMode(GASPIN, INPUT);
pinMode(FLAMEPIN, INPUT);
pinMode(SPEAKERPIN, OUTPUT);
pinMode(LED_INDICATOR_PIN, OUTPUT);
pinMode(LED_LAMP1_PIN, OUTPUT);
pinMode(LED_LAMP2_PIN, OUTPUT);
digitalWrite(RELAYPIN, LOW);
digitalWrite(SPEAKERPIN, LOW);
digitalWrite(LED_INDICATOR_PIN, LOW);
digitalWrite(LED_LAMP1_PIN, LOW);
digitalWrite(LED_LAMP2_PIN, LOW);
lcd.init(); // Initialize the LCD
lcd.backlight(); // Turn on the LCD backlight
// Welcome message with scrolling text
lcd.setCursor(0, 0);
lcd.print("Welcome to Smart");
lcd.setCursor(0, 1);
lcd.print("Home");
delay(2000); // Delay to show the full message initially
for (int i = 0; i < 16; i++) {
lcd.scrollDisplayLeft(); // Scroll text to the left
delay(300); // Delay 0.3 second between scroll steps
}
lcd.clear();
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
lcd.setCursor(0, 0);
lcd.print("Connecting to");
lcd.setCursor(0, 1);
lcd.print("WiFi...");
for (int i = 0; i < 16; i++) {
lcd.scrollDisplayLeft(); // Scroll text to the left
delay(300); // Delay 0.3 second between scroll steps
}
lcd.clear();
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
lcd.setCursor(0, 0);
lcd.print("Connected to WiFi");
for (int i = 0; i < 16; i++) {
lcd.scrollDisplayLeft(); // Scroll text to the left
delay(300); // Delay 0.3 second between scroll steps
}
lcd.clear();
Blynk.begin(BLYNK_AUTH_TOKEN, ssid, password);
}
BLYNK_WRITE(VPIN_LAMP1) {
int pinValue = param.asInt();
digitalWrite(LED_LAMP1_PIN, pinValue);
}
BLYNK_WRITE(VPIN_LAMP2) {
int pinValue = param.asInt();
digitalWrite(LED_LAMP2_PIN, pinValue);
}
void loop() {
Blynk.run();
float temperature = dht.readTemperature();
float humidity = dht.readHumidity();
int gasValue = analogRead(GASPIN);
int flameValue = analogRead(FLAMEPIN);
// Kirim ke Blynk
Blynk.virtualWrite(VPIN_TEMPERATURE, temperature);
Blynk.virtualWrite(VPIN_HUMIDITY, humidity);
Blynk.virtualWrite(VPIN_GAS, gasValue);
Blynk.virtualWrite(VPIN_FLAME, flameValue);
// LCD output default
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("T:");
lcd.print(temperature, 1);
lcd.print("C H:");
lcd.print(humidity, 0);
lcd.print("%");
lcd.setCursor(0, 1);
lcd.print("G:");
lcd.print(gasValue);
lcd.print(" F:");
lcd.print(flameValue);
// Kondisi darurat
bool isAlert = gasValue > 1000 || flameValue > 1000;
if (isAlert) {
digitalWrite(RELAYPIN, HIGH);
digitalWrite(SPEAKERPIN, HIGH); // Aktifkan buzzer
digitalWrite(LED_INDICATOR_PIN, HIGH);
Blynk.virtualWrite(VPIN_RELAY, 1);
Blynk.virtualWrite(VPIN_ALARM, 1);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("!!! BAHAYA !!!");
lcd.setCursor(0, 1);
lcd.print("Gas/Api Terdeteksi");
} else {
digitalWrite(RELAYPIN, LOW);
digitalWrite(SPEAKERPIN, LOW); // Matikan buzzer
digitalWrite(LED_INDICATOR_PIN, LOW);
Blynk.virtualWrite(VPIN_RELAY, 0);
Blynk.virtualWrite(VPIN_ALARM, 1);
}
delay(2000); // Waktu refresh
}