Day 2 Presentation

So, we called our home “GreenGuard”. It is a sustainable IoT-based smart home solution designed to enhance energy efficiency, comfort, and safety. It integrates multiple sensors and smart components to intelligently manage home environments while minimizing energy consumption. The key features include:

🌡️ Smart Climate Control:

Automatically opens windows when the temperature exceeds 20°C or humidity surpasses 70%, promoting natural ventilation.

Fan activation within a comfortable temperature range (20-30°C) to improve air circulation without overcooling.

🔕 Silent Mode with RFID:

Mutes alerts using an RFID card, reducing noise pollution and conserving power when not needed. (we are still trying to get the RFID tag reading to work)

🚪 Motion-Activated Door Control:

Opens the door only when motion is detected and a button is pressed, enhancing security and minimizing unnecessary power usage.

🌐 Real-Time Weather Integration:

Displays next-day weather forecasts on the LCD, optimizing heating and cooling decisions based on external conditions (requires WiFi).

🌱 Energy-Saving and Eco Modes:

Window and fan behavior adapt based on indoor conditions, reducing HVAC system reliance and lowering overall power consumption.

📊 Comprehensive Status Monitoring:

Real-time temperature, humidity, and air quality data displayed on a 16×2 LCD for continuous home status awareness.

Day 2 Presentation

Home that tracks electricity prices and adapts to it

Ad-Hoc Sensor Networks for Neighborhood Safety:​ Emergency Alerts: Nearby homes can communicate to share data about fire, smoke, gas leaks, or intrusions.​ Collective Security: Use mesh networks to create a neighborhood-wide alarm system for better safety.​ Predictive Maintenance and Analytics:​ AI-Based Predictions: Use machine learning to predict appliance failures and optimize maintenance schedules.​ Usage Analytics: Provide insights on energy usage to promote more sustainable habits.​ ​ ​ Renewable Energy Integration:​ Solar and Battery Integration: Smart control for charging and discharging based on real-time energy prices.​ Electric Vehicle (EV) Charging Management: Coordinate EV charging when electricity is cheapest.​ Waste and Water Management:​ Smart Water Meters: Detect leaks and optimize water usage.​ Compost and Recycling Guidance: Use sensors to assist in proper waste segregation.

Day 1: We gathered our team members according to our interests and built our smart home. Then we tested a few existing codes. We brainstormed with each other and finally agreed about the main points that we are all going to build for our sustainable home. We might not be able to implement everything, of course, but then these could remain as future scope.

We finalized our presentation before leaving so that we can think more about the solution implementation at home.

Day 2: Immediately after presenting our solution, we received valuable feedback that will help us proceed.

- We started by thinking about a good way to fetch the real-time data from URLs (electricity providers and/or weather forecast sites). We are thinking if we should fetch the data every hour or what would be the good interval to get the updates.

The battery usage of the IoT devices has to be taken into account. We then decided to get the data immediately when the device is turned on and then we hard-code the moment/timestamp during the day (at midnight for instance) when it updates the prices/timing, etc.

- For now, we are looking for wifi connection, but then for the sake of the simulation and demo, we will show the fluctuation of prices in a loop like

- 11:00, we already managed to get the connection working and read some prices.

- Audio alerts are working, and we are thinking of having different alerts for different functions. In addition to audio alerts, we will have the LCD showing about the price and weather. For accessibility reasons, we were thinking about impaired people that have trouble seeing/reading; they will have “Morse code”-like“ alerts to be able to understand the meaning of the beeping.

- After discussion, we decided to use the left button to turn off the buzzer and the right button to switch between the data that is shown in owr LCD. For instance, it shows the electricity price and the temperature.

- The LED turns on when the prices are low for example. So, we are fetching online the electricity price from the electricity provider (it could be for example extracted from here: https://vare.fi/sahkon-hinta/sahkon-hinta-nyt/?utm_term=s%C3%A4hk%C3%B6n%20hinta%20nyt%20p%C3%B6rssis%C3%A4hk%C3%B6&utm_campaign=SEM+%7C%C2%A0S%C3%A4hk%C3%B6n+hinta&utm_source=adwords&utm_medium=ppc&hsa_acc=9613272229&hsa_cam=21500165233&hsa_grp=164788003843&hsa_ad=706690047770&hsa_src=g&hsa_tgt=kwd-2366899273632&hsa_kw=s%C3%A4hk%C3%B6n%20hinta%20nyt%20p%C3%B6rssis%C3%A4hk%C3%B6&hsa_mt=b&hsa_net=adwords&hsa_ver=3&gad_source=1&gad_campaignid=21500165233&gbraid=0AAAAAC5G_NIUGrEO4FEF5yBbn5WpWL1ER&gclid=CjwKCAjw_pDBBhBMEiwAmY02NgOSaQ7zkck59UzrX335iREoeV3npKda0DlU1P5GvDATViJVcy2K7xoCwXgQAvD_BwE )

And according to the prices, our home appliances are used. The current price is also displayed on our LCD and the right button gives us the option to switch to other views. If the price is high, the buzzer goes on and the red light is on. The buzzer could be turned off with the left button. We could add a green led light all the time when the price is considered low or negative

final ppt greenguard_smart_home_presentation_final_day.pptx

#include <WiFi.h> #include <HTTPClient.h> #include <Wire.h> #include <LiquidCrystal_I2C.h> #include <DHT.h> #include <DHT_U.h> #include <FastLED.h>

WiFi const char* ssid = “Phone”; const char* password = “12345678”; Tilamuuttujat int screenstate = 0; float price = 0; float temperature; float last_temperature; float humidity; float last_humidity; bool alertcheck = true;

Rajat #define PRICE_ALERT_THRESHOLD 20.0 c/kWh

Pinimääritykset #define LED_PIN 26 #define BUTTON_LEFT_PIN 16 #define BUTTON_RIGHT_PIN 27 #define BUZZER_PIN 25 #define NUM_LEDS 4 #define DHT_PIN 17 #define DHT_TYPE DHT11 Näyttötilat #define price_display 0 #define temperature_display 1

Muut globaalit CRGB leds[NUM_LEDS]; boolean alertStatus = false; int display_state = 0; LiquidCrystal_I2C lcd(0x27, 16, 2); DHT dht(DHT_PIN, DHT_TYPE); Ajastin hintapäivitykselle unsigned long lastPriceUpdate = 0; const unsigned long priceInterval = 0.5 * 60 * 1000; 30 sec WiFi-yhteys void connectwifi() { WiFi.begin(ssid, password); Serial.println(“Yhdistetään WiFi-verkkoon…”);

while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print(”.“); }

Serial.println(“\nWiFi-yhteys muodostettu!”); }

Piippaus void beepBuzzer() { tone(BUZZER_PIN, 440, 250); noTone(BUZZER_PIN); } Hälytys void alert(String warningMessage, int freq) { lcd.clear(); lcd.setCursor(0, 0); lcd.print(warningMessage);

while (alertStatus) { beepBuzzer(); for (int i = 0; i < NUM_LEDS; i++) { leds[i] = CRGB::Red; } FastLED.show(); delay(1000 / freq);

if (digitalRead(BUTTON_LEFT_PIN) == LOW) { delay(50); debounce alertStatus = false; clearAlert(); } for (int i = 0; i < NUM_LEDS; i++) { leds[i] = CRGB::Black; } FastLED.show(); delay(1000 / freq); } } Hälytyksen poisto void clearAlert() { alertStatus = false; lcd.clear(); for (int i = 0; i < NUM_LEDS; i++) { leds[i] = CRGB::Black; } FastLED.show(); alertcheck = false; }

Oikean napin painallus int r_buttonPress() { if (digitalRead(BUTTON_RIGHT_PIN) == LOW) { delay(100); debounce return 1; } return 0; }

Näytön päivitys void screen(int state) { lcd.clear(); if (state == temperature_display) { lcd.setCursor(0, 0); lcd.print(“Temp: ”); lcd.print(temperature); lcd.print(” C“); lcd.setCursor(0, 1); lcd.print(“Hum: ”); lcd.print(humidity); lcd.print(” %“); } else if (state == price_display) { lcd.setCursor(0, 0); lcd.print(“Price: ”); lcd.print(price); lcd.print(“c/kWh”); } } randomhinta float changePrice() {

float newPrice = random(18, 30); Generoi uusi hinta if (newPrice > 0.5 || newPrice < -0.05) { newPrice = 0.05; Palauta hinta, jos se karkaa käsistä } return newPrice; Palauta uusi hinta

} Hintahaku float curPrice() { String priceStr = “0”; if (WiFi.status() == WL_CONNECTED) { HTTPClient http; String date = “2024-05-14”; int hour = 14; String url = “https://api.porssisahko.net/v1/price.json?date=” + date + ”&hour=“ + String(hour); http.begin(url); int httpResponseCode = http.GET(); if (httpResponseCode > 0) { String payload = http.getString(); int priceIndex = payload.indexOf(“\”price\”:“); if (priceIndex != -1) { int start = payload.indexOf(”:“, priceIndex) + 1; int end = payload.indexOf(”}“, start); priceStr = payload.substring(start, end); priceStr.trim(); } } else { Serial.print(“HTTP-virhe: ”); Serial.println(httpResponseCode); } http.end(); } return priceStr.toFloat(); } Alustus void setup() { randomSeed(71137); Serial.begin(115200); connectwifi(); lcd.init(); lcd.backlight(); dht.begin(); pinMode(BUZZER_PIN, OUTPUT); digitalWrite(BUZZER_PIN, LOW); FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS); FastLED.setBrightness(50); pinMode(BUTTON_LEFT_PIN, INPUT_PULLUP); pinMode(BUTTON_RIGHT_PIN, INPUT_PULLUP); screen(display_state); } Pääsilmukka void loop() { if (millis() - lastPriceUpdate > priceInterval || price == 0) { price = changePrice(); lastPriceUpdate = millis(); alertcheck = true; }

temperature = dht.readTemperature(); humidity = dht.readHumidity();

if (r_buttonPress() == 1) { delay(50); display_state = !display_state; screen(display_state); }

if (alertcheck && price > PRICE_ALERT_THRESHOLD) { alertStatus = true; alert(“Price is high”, 5);

screen(display_state); }

if ((last_humidity != humidity || last_temperature != temperature)/* && display_state == temperature_display*/) { if (humidity ⇐ 100) { screen(display_state); } }

last_temperature = temperature; last_humidity = humidity; }