==== Overview of Hardware Components in the Kit ====
//
It's time to get to know the kit!\\

This page gives you a brief introduction of what each component does and how it can bring your smart home ideas to life. For detailed instructions on testing and operating these components, click on this **[[https://docs.keyestudio.com/projects/KS5009/en/latest/docs/index.html| link]].**// 

The following is a diagram of a general control system flow.

{{ :ixc2025:basic_system.png?400 }}

  - The process begins with **Input Devices** or **Sensors**, which collect data from the environment. 
  - This data is sent to a **Processing Unit** (such as a microcontroller or computer), where decisions are made based on the input. 
  - Finally, the **Output Devices** or **Actuators** execute the necessary actions, such as turning on lights, adjusting windows, or activating alarms.

List of components in the kit:
  - Input Devices:
    * Gas sensor
    * Steam/water drop sensor
    * Humidity and temperature sensor
    * RFID sensor
    * PIR motion sensor
    * Button
  - Processing Unit:
    * ESP32 PLUS Development Board
  - Output Devices:
    * DC motor (connected to fan)
    * Servo motor
    * Buzzer
    * Yellow LED
    * RGB LED
    * LCD Display

== Input Devices ==

^ Name                   ^ Image                                    ^ Description                                            ^ Example Use                         ^
| Gas Sensor             | {{ :ixc2025:gas.webp?90 |}}             | Detects harmful gases in the air to ensure safety.     | Used to detect gas leaks or harmful emissions in case of fire. |
| Steam/Water Drop Sensor| {{ :ixc2025:steam.webp?90 |}}           | Senses the presence of steam or water droplets.        | Used to detect raindrops for outdoor applications or leak monitoring. |
| Humidity and Temperature Sensor | {{ :ixc2025:tem_humidity.webp?90 |}} | Measures the humidity and temperature of the environment. | Controls fans or air conditioners to maintain a comfortable climate. |
| RFID                   | {{ :ixc2025:rfid.webp?90 |}}           | Identifies authorized users via RFID tags, such as a card or key.            | Used for secure access to doors or cabinets. |
| PIR Motion Sensor      | {{ :ixc2025:pir.webp?90 |}}             | Detects motion by sensing infrared radiation.          | Turns lights on when someone enters a room. |
| Button                 | {{ :ixc2025:button.webp?90 |}}          | Manual input device that sends a signal when pressed.  | Acts as a switch to manually control devices like lights or fans. |


== Processing Unit ==
^ Name            ^ Image                             ^ Description                                                                                 ^
| ESP32 PLUS Development Board | {{ :ixc2025:esp32.jpeg?150 |}} | A versatile Wi-Fi + Bluetooth development board for IoT and smart home applications. Equipped with ESP32-WROVER-32 module, hall sensor, high-speed SDIO/SPI, UART, I2S, I2C, and freeRTOS operating system. It includes Wi-Fi and Bluetooth capabilities, you may use this for features that need wireless communication.|

== Output Devices ==
^ Name     ^ Image                                   ^ Description                                                ^ Example Use                                   ^
| DC Motor (Fan)         | {{ :ixc2025:dc_motor.webp?90 |}}        | Converts electrical energy into mechanical motion to drive a fan. | Used for ventilation in smart home applications. |
| Servo Motor            | {{ :ixc2025:servo.webp?90 |}}     | A motor that precisely controls angular or linear position.       | Used to open/close windows or doors.            |
| Buzzer                 | {{ :ixc2025:buzzer.webp?90 |}}          | Emits an audible sound signal for notifications or alerts.         | Alerts residents to hazards like gas leaks.     |
| Yellow LED             | {{ :ixc2025:yellow_LED.webp?90 |}}      | A single-color LED used for simple visual signals.                | Indicates system status (e.g., on/off). It could also be used to imitate ceiling lights in the house.         |
| RGB LED                | {{ :ixc2025:rgb.webp?90 |}}         | A multi-color LED capable of displaying various colors.            | Provides visual feedback or ambient lighting.   |
| LCD Display            | {{ :ixc2025:lcd.webp?90 |}}     | A screen used to display information like system status or data.  | Displays sensor readings or user notifications. |

You may test the components with the tutorial and test codes provided in the documentation by keyestudio: [[https://docs.keyestudio.com/projects/KS5009/en/latest/docs/Arduino/arduino.html#arduino-projects|Arduino Tutorial]] and [[https://docs.keyestudio.com/projects/KS5009/en/latest/docs/Python/KS5009-Python.html#python-projects|Python Tutorial]].

Additional concepts that might be useful (you may explore these on your own):\\
  * PWM (Pulse Width Modulation):
    * Useful for:
      * RGB LED: blend color by varying the brightness of red, green, and blue.
      * Servo motor: use PWM to control precise angular movements.
      * DC motor (fan): PWM can adjust fan speed.
  * Communication technologies and protocols:
    * Wi-Fi and Bluetooth Communication:
      * Useful for sending sensor data to a cloud platform or app and for remote control of devices.
    * I2C Communication:
      * Useful for:
        * LCD Display: uses I2C for displaying text or data.
        * RFID: uses I2C for transferring tag information.
    * UART (Serial Communication):
      * Useful for ESP32 Dev Board which communicates with the computer or external devices using UART.