Sistem Penyiram & Pelembab Otomatis Kumbung Jamur Tiram Smart IoT Pakai ESP32 + Blynk WOKWI

Pada bagian ini akan dibahas pembuatan sistem otomatisasi penyiraman, pengontrol kelembapan, dan sirkulasi udara pada kumbung jamur tiram berbasis mikrokontroler ESP32, sensor suhu dan kelembapan DHT22, layar LCD 16×2 I2C, modul relay sprayer (pelembab) & kipas pendingin, buzzer alarm peringatan, LED indikator, serta platform Blynk IoT pada software simulasi WOKWI. Skematik rangkaian ditunjukkan pada Gambar 1, program Arduino pada Kode 1, dan video pembuatan pada tautan Video 1. Sistem menerapkan logika kontrol kelembapan hysteresys untuk menjaga kondisi mikro kumbung jamur pada parameter ideal (RH 80% – 90% dan suhu 22 – 28°C). Jika kelembapan di bawah 70%, sistem mengaktifkan pompa sprayer dan LED indikator merah. Apabila kelembapan sangat rendah (< 60%), alarm buzzer berbunyi dan notifikasi darurat “kumbung_kering” dikirimkan ke aplikasi Blynk. Kipas sirkulasi akan otomatis aktif saat suhu melebihi 28°C. Sistem juga dilengkapi fitur manual override melalui tombol virtual di dashboard Blynk.

Gambar 1. Skematik rangkaian sistem

List Pin:

• Sensor Suhu & Kelembapan (DHT22)
  VCC => 3.3V / 5V
  GND => GND
  SDA / DATA => GPIO 15 (DHTPIN)
• LCD 16×2 I2C (Alamat: 0x27)
  GND => GND
  VCC => 5V / 3.3V
  SDA => GPIO 21
  SCL => GPIO 22
• Actuator Relay & Output Indikator
  SPRAYER_PIN (Relay Pompa Sprayer) => GPIO 18
  FAN_PIN (Relay Kipas Sirkulasi) => GPIO 19
  LED_GREEN (Indikator Kelembapan) => GPIO 2
  LED_RED (Indikator Kumbung Kering)=> GPIO 5
  BUZZER_PIN (Alarm Peringatan) => GPIO 4

List Virtual Pin:

• V0 => Kelembapan / Humidity (Float) – Menampilkan Nilai Kelembapan Real-Time (% RH)
• V1 => Suhu / Temperature (Float) – Menampilkan Nilai Suhu Real-Time (°C)
• V2 => Status Sistem / Status Text (String) – Menampilkan Status Operasional Kumbung Jamur
• V3 => Status Pompa Sprayer (Integer 0/1) – Indikator Aktivasi Pompa Sprayer
• V4 => Status Kipas / Fan (Integer 0/1) – Indikator Aktivasi Kipas Pendingin
• V5 => Switch Manual Override (Integer 0/1) – Sakelar Kontrol Manual Sprayer & Fan dari Aplikasi Blynk

Kode Arduino 1. Kode Program

// ============================= 
// ALFIAN CENTER 
// SUBSCRIBE 
// Sistem Penyiram & Pelembab Otomatis Kumbung Jamur Tiram Smart IoT Pakai ESP32 + Blynk
// PROGRAM BAKAL AKU KIRIM DENGAN SYARAT DIBAWAH 
// LIKE 50, KOMEN 30 DAN * WAJIB SUBSCRIBE *
// PROGRAM DIKIRIM VIA KOMENTAR 
// =============================

#define BLYNK_TEMPLATE_ID "ID"
#define BLYNK_TEMPLATE_NAME "NAME"
#define BLYNK_AUTH_TOKEN "TOKEN"


#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
#include "DHT.h"

#define DHTPIN 15     
#define DHTTYPE DHT22   
#define LED_GREEN 2    // Indikator Kelembapan Aman
#define LED_RED 5      // Indikator Kumbung Kering
#define SPRAYER_PIN 18 // Relay 1: Pompa Sprayer (LED Biru)
#define FAN_PIN 19     // Relay 2: Kipas Sirkulasi (Motor DC)
#define BUZZER_PIN 4   // Alarm Peringatan

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

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
BlynkTimer timer;

// Variabel Kontrol
int manualOverride = 0;
bool isNotifSent = false;
unsigned long waktuBlink = 0;
bool statusBlink = false;

BLYNK_WRITE(V5) {
  manualOverride = param.asInt();
}

void monitorMushroomHouse() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  if (isnan(h) || isnan(t)) {
    lcd.setCursor(0, 0);
    lcd.print("Sensor Error!!  ");
    return;
  }

  String statusStr = "";

  if (manualOverride == 1) {
    statusStr = "MANUAL MODE (HP)";
    digitalWrite(SPRAYER_PIN, HIGH);
    digitalWrite(FAN_PIN, HIGH);
    digitalWrite(LED_RED, LOW);
    digitalWrite(LED_GREEN, HIGH);
    noTone(BUZZER_PIN);
  } 
  else {
    // ==================================================
    // LOGIKA KONTROL KELEMBAPAN JAMUR TIRAM (HYSTERESIS)
    // Syarat Tumbuh Ideal: 80% - 90% RH | Suhu Ideal: 22 - 28°C
    // ==================================================

    // 1. Kontrol Pompa Sprayer (Pelembab)
    if (h < 70.0) {
      digitalWrite(SPRAYER_PIN, HIGH); // NYALAKAN Sprayer jika kelembapan drop
      statusStr = "SPRAYING (DRY!)";
      
      // Indikator Merah Berkedip
      if (millis() - waktuBlink > 300) {
        waktuBlink = millis();
        statusBlink = !statusBlink;
        digitalWrite(LED_RED, statusBlink ? HIGH : LOW);
      }
      digitalWrite(LED_GREEN, LOW);

      // Notifikasi Blynk & Alarm jika kelembapan sangat rendah (< 60%)
      if (h < 60.0) {
        tone(BUZZER_PIN, 1500, 200);
        if (!isNotifSent) {
          Blynk.logEvent("kumbung_kering", "⚠️ BAHAYA! Kumbung Jamur Kering: " + String(h, 1) + "% RH! Sprayer Aktif.");
          isNotifSent = true;
        }
      }

    } else if (h >= 80.0) {
      digitalWrite(SPRAYER_PIN, LOW); // MATIKAN Sprayer jika kelembapan sudah ideal
      statusStr = "HUMID & IDEAL";
      digitalWrite(LED_RED, LOW);
      digitalWrite(LED_GREEN, HIGH);
      noTone(BUZZER_PIN);
      isNotifSent = false;
    }

    // 2. Kontrol Kipas / Fan (Sirkulasi Udara & Pendingin)
    if (t > 28.0) {
      digitalWrite(FAN_PIN, HIGH); // Nyalakan kipas jika kumbung terlalu panas
    } else {
      digitalWrite(FAN_PIN, LOW);
    }
  }

  // Kirim Data ke Dashboard Blynk
  Blynk.virtualWrite(V0, h);
  Blynk.virtualWrite(V1, t);
  Blynk.virtualWrite(V2, statusStr);
  Blynk.virtualWrite(V3, digitalRead(SPRAYER_PIN) ? 1 : 0);
  Blynk.virtualWrite(V4, digitalRead(FAN_PIN) ? 1 : 0);

  // Update Tampilan LCD
  lcd.setCursor(0, 0);
  lcd.print("H:"); lcd.print(h, 1); lcd.print("% ");
  lcd.print("T:"); lcd.print(t, 1); lcd.print("C");

  lcd.setCursor(0, 1);
  lcd.print("PMP:"); 
  lcd.print(digitalRead(SPRAYER_PIN) ? "ON " : "OFF");
  lcd.print(" FAN:");
  lcd.print(digitalRead(FAN_PIN) ? "ON " : "OFF");
}

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

  pinMode(LED_GREEN, OUTPUT);
  pinMode(LED_RED, OUTPUT);
  pinMode(SPRAYER_PIN, OUTPUT);
  pinMode(FAN_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  dht.begin();

  lcd.init();
  lcd.backlight();
  lcd.print("Smart Mushroom");
  lcd.setCursor(0, 1);
  lcd.print("Greenhouse V1");
  delay(1500);

  Blynk.begin(auth, ssid, pass);
  lcd.clear();

  timer.setInterval(500L, monitorMushroomHouse);
}

void loop() {
  Blynk.run();
  timer.run();
}

Video 1. Video tutorial pembuatan

TAG:

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