Lesson objectives:
In this lesson, we provide an overview of the basic features and applications of the TTGO T-Display ESP32, with a particular focus on its built-in screen. By the end of the lesson, you will understand how the screen works and how it can be used in your projects.

1. Overview of the TTGO T-Display ESP32

The TTGO T-Display ESP32 is a development board that combines an ESP32 microcontroller with a 1.14-inch color TFT screen. This board is ideal for projects that require visual output. The screen is driven by the ST7789V driver and has a resolution of 135x240 pixels, making it suitable for displaying text, icons, and simple graphics.

Key screen features:

• 1.14-inch TFT color screen with a resolution of 135x240 pixels.
• Driver: ST7789V for controlling the screen.
• Brightness control via a dedicated backlight pin.
• Compact size: Perfect for small and portable projects.

2. Benefits of using the TTGO T-Display

The built-in screen adds a visual component to your project, opening up many functional and aesthetic possibilities. Here are some examples:

• Displaying real-time data: Perfect for displaying sensor readings, clock functions, weather information, or system status.
• User interfaces: Create simple interfaces with visual feedback, such as menus or settings.
• Interactive projects: Although the TTGO T-Display does not have touch functionality, it can be combined with buttons or sensors to create interactive interfaces.

List of required components:

	AHT10 high-precision temperature and humidity sensor
	TTGO T-Display ESP32 16MB with WiFi, Bluetooth and 1.1" color LCD screen
	Dupont cables, 40 pcs

3. Integrating the screen

Although the TTGO T-Display uses some of the GPIO pins for the screen itself, several pins remain available for sensors, actuators, and other peripherals. The compact screen ensures that your projects stay small and efficient while offering significant functionality.

Common uses for the screen:

• Status displays for IoT devices: Display system information or sensor data in a clear and compact format.
• Portable gadgets: Create small devices with readable screens, such as fitness trackers, watches, or small game consoles.
• Visual notifications: Build smart home devices that display alerts or updates, such as temperature changes or messages.

The TTGO T-Display ESP32 is versatile and easy to integrate into many projects. It offers a cost-effective and visually appealing way to enhance your creations with a screen.

Key takeaways

• The TTGO T-Display ESP32 has a built-in 1.14-inch color TFT screen with a resolution of 135x240 pixels.
• It is ideal for visualizing real-time data, such as sensor readings, system status, and notifications.
• The screen can be used in many applications, including IoT devices, portable gadgets, and simple user interfaces.
• Its compact size and integrated screen make it suitable for projects requiring both visual output and wireless connectivity.

In upcoming lessons, you will explore advanced uses of the screen, including integration with sensors and Wi-Fi. In the next lesson, we will go through how everything connects and get you ready for programming.

About the measurements: The station in this series measures temperature and relative humidity using the AHT10. These are indoor climate readings, not direct measurements of CO2, VOCs, or particles. The series name “air quality monitoring” should be understood with this limitation.