2.2-inch TFT Display Module for Arduino

An affordable, full-color display solution for Arduino projects.

Introduction

The 2.2-inch TFT Display Module is a small, full-color LCD screen that can be interfaced with Arduino boards to create visually appealing and interactive projects. With a resolution of 240x320 pixels, it supports rich graphical outputs and text, making it suitable for dashboards, gauges, or image displays.

Pinout

The module typically includes the following pins:

Pin	Name	Description
1	GND	Ground connection for power supply.
2	VCC	Power supply input (3.3V or 5V, depending on the model).
3	CS	Chip Select pin, used for SPI communication.
4	RST	Reset pin to initialize the display.
5	DC	Data/Command selection pin.
6	SDI/MOSI	Master Out Slave In, for SPI communication.
7	SCK	Clock pin for SPI communication.
8	LED	Backlight control pin.

Features

Screen Size: 2.2 inches
Resolution: 240x320 pixels
Controller: ILI9341
Interface: SPI
Voltage Compatibility: 3.3V or 5V
Color Depth: 65K colors
Supports graphical and text-based output

Applications

DIY dashboards
Smart home control panels
Embedded graphical interfaces
Wearable devices
Portable displays for IoT projects

How It Works

The 2.2-inch TFT Display works using SPI communication. Commands and data are sent sequentially to the display controller (e.g., ILI9341), which interprets them to update the pixel values on the screen. The CS pin enables communication, while the DC pin distinguishes between command and data bytes. The LED pin is used to control the backlight brightness.

Programming the 2.2-inch TFT Display

The display can be programmed using Arduino libraries like Adafruit GFX and Adafruit ILI9341. Below is an example to display text on the screen:

        #include 
        #include 
        
        // Define pins
        #define TFT_CS 10
        #define TFT_RST 9
        #define TFT_DC 8
        
        // Initialize the display
        Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
        
        void setup() {
            tft.begin();
            tft.setRotation(1); // Landscape orientation
            tft.fillScreen(ILI9341_BLACK);
            tft.setTextColor(ILI9341_WHITE);
            tft.setTextSize(2);
            tft.setCursor(20, 50);
            tft.println("Hello, World!");
        }
        
        void loop() {
            // Display remains static in this example
        }

Troubleshooting

If you face issues with the 2.2-inch TFT Display module, check the following:

No display output: Verify the power supply and wiring connections.
Incorrect display output: Double-check the SPI pin connections and baud rate settings in your code.
Backlight not working: Ensure the LED pin is properly powered.
Flickering display: Use a stable power supply and add decoupling capacitors if needed.