Smart Touch Panel For Home Automation

The Smart Touch Panel for Home Automation system is orchestrated by an Arduino Uno microcontroller, which serves as the central processing unit for both local user input and sensor monitoring. The user interface consists of a 6cm TFT touch display shield mounted directly onto the Arduino Uno. This display utilizes the Adafruit GFX and TouchScreen libraries to render graphical interface elements and register physical touch coordinates in real time. When a user presses a virtual button on the screen, the Arduino interprets the touch event and triggers a digital output signal. This signal controls a relay module, which acts as an electrically isolated switch capable of managing higher-power electrical circuits and connected appliances. Simultaneously, the system monitors environmental conditions using an NTC (Negative Temperature Coefficient) thermistor. Because an NTC thermistor changes its electrical resistance in response to temperature variations, the Arduino measures the resulting analog voltage divider circuit and applies the NTC thermistor library to calculate the accurate ambient room temperature. This temperature data is continuously processed and displayed on the TFT screen. Furthermore, remote interaction is achieved by integrating wireless functionality designed through MIT App Inventor, allowing a custom Android application to communicate with the hardware setup, thereby bridging local touch controls and remote smart-device management into a cohesive embedded system powered by a steady external power supply.