LiteHouse.com - See Inside

S e e I n s i d e

Curious to see LiteHouse in action? Try our interactive simulator! Explore how each component—sensors to actuators—works together to create a self-sustaining plant system. Test different conditions, trigger responses, and understand the real-time decisions behind urban farming innovation. Click below and experience it for yourself!

LiteHouse is powered by an integrated system of sensors, actuators, and control components that work together to maintain optimal conditions for plant growth.

Sensors

The Moisture Sensor detects soil dryness and automatically triggers the DC Water Pump, ensuring the plant receives water when needed. The Light Sensor monitors brightness levels, while the DHT22 Temperature and Humidity Sensor tracks environmental conditions, displaying real-time data on an LCD Screen for easy monitoring.

Actuators

Actuators respond based on sensor input—an RGB LED indicates plant health, shifting colours from green (ideal) to red (critical). The UV LED provides supplemental light, turning on at scheduled when moisture is wet. All components are controlled by an Arduino system, which processes sensor data and activates the appropriate responses, like turning on the sprinkling system (DC motor and DC pump) when soil is too dry

Control

The IR sensor acts as a button to manually trigger watering when needed, giving users direct control over the system. Meanwhile, the RTC (Real-Time Clock) ensures automated watering and UV light activation scheduling at set intervals. Together, these components help maintain optimal plant growth with both manual and automated functions.

But that’s not all—want to see what’s happening behind the scenes? Dive into the actual code that makes LiteHouse work! Whether you're just curious or want to modify the logic yourself, the code is here for you to explore.

Global Declaration

#include <Wire.h>#include <Servo.h>#include <LiquidCrystal_I2C.h>#include <Adafruit_Sensor.h>#include <DHT.h>#include <DHT_U.h>#include <RTClib.h>
#define DHTPIN 2#define DHT_VCC 12#define DHTTYPE DHT22#define sensorPower 3#define sensorPin A1#define soilWet 700#define soilDry 900
int hs = 6;int hss = LOW;
int ls = A0;int lss = 0;
int open = 0;int count1 = 0;int count2 = 0;int count3 = 1;int count4 = 1;int count5 = 0;int done = 0;int wave = 1;
const int r = 8;const int g = 9;const int b = 10;
LiquidCrystal_I2C lcd(0x27, 16, 2);DHT dht(2, DHT22);RTC_DS3231 rtc;
int motor1 = 5;int pump = 4;int pump_on = 0;int watered = 0;int watering = 0;

int uv1 = 11;int uv_on = 0;int uv2 = 13;int timer = 0;

Setup

void setup() {  // Initialize components  pinMode(sensorPower, OUTPUT);  pinMode(hs, INPUT);  pinMode(ls, INPUT);  pinMode(r, OUTPUT);  pinMode(g, OUTPUT);  pinMode(b, OUTPUT);  pinMode(motor1, OUTPUT);  pinMode(pump, OUTPUT);  pinMode(uv1, OUTPUT);  pinMode(uv2, OUTPUT);  pinMode(DHT_VCC, OUTPUT);
  lcd.begin();  lcd.backlight();  lcd.clear();
  lcd.print("Welcome to");  delay(500);  lcd.setCursor(0, 1);  lcd.print("LiteHouse");  delay(1000);  lcd.clear();
  digitalWrite(DHT_VCC, HIGH);  dht.begin();   digitalWrite(sensorPower, LOW);
  if (!rtc.begin()) {    lcd.print("RTC failed");    while (1);  }
  if (rtc.lostPower()) {    lcd.print("RTC lost power");    rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); // Set RTC to compile time  }
  digitalWrite(motor1, HIGH);  digitalWrite(pump, LOW);
  Serial.begin(9600);}

Loop & Functions

void loop() {  //digitalWrite(motor1, HIGH);  //digitalWrite(pump, LOW);  //digitalWrite(uv1, HIGH);  //digitalWrite(uv2, HIGH);
  // Read temperature and humidity  digitalWrite(DHT_VCC, HIGH);    int temp = dht.readTemperature();  int humidity = dht.readHumidity();  lss = analogRead(ls);    int moist = readSensor();  float lcdmoist = (moist / 1023.0) * 100; // Convert to percentage  float lcdlss = (lss / 1023.0) * 100;    // simulate time  DateTime now = rtc.now();  int hour = now.hour();  int min = now.minute();  int sec = now.second();  Serial.print("hour: ");  Serial.println(hour);  Serial.print("min: ");  Serial.println(min);  Serial.print("sec: ");  Serial.println(sec);    if (watering == 0){    lcd.clear();    lcd.setCursor(0, 0);    if(count5%2 == 0){      lcd.print("Moisture:");      lcd.print(lcdmoist);      lcd.print("%");      lcd.setCursor(0,1);      lcd.print("Light:");      lcd.print(lcdlss);      lcd.print("%");      }    else if(count5%2 == 1){      lcd.print("Temperature:");      lcd.print(temp);      lcd.print((char)223);      lcd.print("C");      lcd.setCursor(0, 1);      lcd.print("Humidity:");      lcd.print(humidity);      lcd.print("%");      }    delay(2000);    count5 = count5+1;    }
  // when to water  if (hour%3 == 0){    if (min == 0){      if (sec <= 5 || sec >= 55){        if(moist >= soilDry) {          //water          analogWrite(b, 255);          analogWrite(g, 255);          pump_on = 1;          digitalWrite(DHT_VCC, LOW);          digitalWrite(motor1, LOW);          digitalWrite(pump, HIGH);          delay(200);          digitalWrite(motor1, HIGH);          digitalWrite(pump, LOW);          digitalWrite(DHT_VCC, LOW);          pump_on = 0;          analogWrite(b, 0);          analogWrite(g, 0);       }        else if (moist <= soilWet && uv_on == 0){          //uv          digitalWrite(11, HIGH);          digitalWrite(13, HIGH);          uv_on = 1;        }      }    }  }  if(pump_on == 0){    digitalWrite(pump, LOW);  }
  // when to UV light  if (hour%6 == 0){    if (min == 0){      if(sec <= 5 || sec >= 55){        digitalWrite(11, HIGH);        digitalWrite(13, HIGH);        uv_on = 1;      }    }  }  if (uv_on == 1){    timer = timer+1;    if (timer >= 3600){      digitalWrite(11, LOW);      digitalWrite(13, LOW);      uv_on = 0;    }  }
  // LED light (count1 is here)  if (lss > 10) {    count1 = count1 + 1;    if (count1 < 1800000) {      analogWrite(g, 255);      analogWrite(r, 0);      analogWrite(b, 0);    } else if (count1 >= 1800000 && count1 < 3600000) {      analogWrite(g, 255);      analogWrite(r, 255);      analogWrite(b, 0);    } else {      analogWrite(g, 0);      analogWrite(r, 255);      analogWrite(b, 0);      digitalWrite(DHT_VCC, LOW);      digitalWrite(motor1, LOW);      digitalWrite(pump, HIGH);      delay(200);      digitalWrite(motor1, HIGH);      digitalWrite(pump, LOW);      digitalWrite(DHT_VCC, LOW);      count1 = 1800000;    }    Serial.println(lss);  } else if (lss < 10) {    analogWrite(r, 0);    analogWrite(g, 0);    analogWrite(b, 0);    count1 = 0;  }
  // Manual Button Watering  hss = digitalRead(hs);  if (hss == LOW) {    watering = 1;    analogWrite(b, 255);    analogWrite(g, 255);    digitalWrite(DHT_VCC, LOW);    digitalWrite(motor1, LOW);    digitalWrite(pump, HIGH);    delay(200);    digitalWrite(motor1, HIGH);    digitalWrite(pump, LOW);    delay(1000);  }  else if (hss == HIGH && lss<10){    digitalWrite(DHT_VCC, HIGH);    analogWrite(b, 0);    analogWrite(g, 0);    watering = 0;  }    if(watering ==1){    lcd.clear();    lcd.setCursor(0,0);    int count4 = 1;    if(count4 == 1){      lcd.print("Watering.");      count4 = 2;    }    else if(count4 == 2){      lcd.print("Watering..");      count4 = 3;    }    else if(count4 == 3){      lcd.print("Watering...");      count4 = 1;    }  }    delay(1000);}
// Functionsint readSensor() {  digitalWrite(sensorPower, HIGH);  delay(50);  int moist = analogRead(sensorPin);  digitalWrite(sensorPower, LOW);  return moist;}

Watch the Demo

See Inside

Be Involved