Description
Product Overview
The Nextion NX3224K024 is a powerful, intelligent Human-Machine Interface (HMI) display module that integrates a 2.4-inch TFT LCD color screen with a resistive touch panel into a single, easy-to-use package . This “Enhanced” series model represents a significant upgrade over basic displays, incorporating a dedicated onboard processor that handles all graphical interface functions independently, freeing your main microcontroller (Arduino, ESP32, Raspberry Pi, STM32) to focus on core application tasks .
Unlike traditional LCDs that require complex parallel wiring and extensive graphics coding, the Nextion communicates via a simple 4-pin UART (Serial) interface using 5V TTL levels. This allows you to control the screen—drawing buttons, updating text, showing graphs, and detecting touches—using straightforward serial commands . The “Enhanced” version adds additional features like a real-time clock (RTC), General Purpose Inputs/Outputs (GPIO), and significantly expanded memory .
Whether you are building a smart home controller, an industrial machine interface, a medical device dashboard, or an IoT data terminal, the NX3224K024 provides a highly professional, plug-and-play visual interface that drastically reduces development time and complexity .
Key Features
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Standalone HMI Processor: The display runs its own firmware. It does not rely on your main MCU to draw pixels. You simply send simple ASCII text commands over UART .
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WYSIWYG GUI Editor: Design your interface by dragging and dropping components (buttons, gauges, sliders, text boxes, etc.) using the free, Windows-based Nextion Editor software. No low-level graphics programming is required .
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Enhanced Series Advantages: Compared to basic Nextion models, the K024 features a faster CPU clock, larger Flash memory, additional GPIO pins, a built-in RTC, and EEPROM for storing user data .
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Robust Display Specifications: A 320×240 resolution provides crisp, clear visuals for a 2.4″ screen, supporting vibrant 65K (16-bit) colors for rich graphics .
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Simple Serial Communication: Uses a standard TTL UART (9600 bps default, up to 921600 bps). Connect the 4 pins (VCC, GND, TX, RX) directly to your microcontroller or USB-to-Serial adapter .
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Integrated Resistive Touch Panel: Includes a durable resistive touch screen that registers input from a finger or stylus, with a lifetime exceeding 1 million touches .
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Expandable I/O: The Enhanced series breaks out 8 digital GPIO pins (0-7) which can be used as inputs, outputs, or PWM outputs (on IO4-IO7) to control external hardware directly from the HMI interface .
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microSD Card Slot: Easily upload your GUI designs (TFT files) and upgrade firmware via a microSD card (requires FAT32 formatting, up to 32GB) .
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Display Diagonal | 2.4 inch |
| Resolution | 320 × 240 pixels (QVGA) |
| Active Area (AA) | 48.96 mm (L) × 36.72 mm (W) |
| Visual Area (VA) | 60.26 mm (L) × 42.72 mm (W) |
| Layout Size | 74.4 mm (L) × 42.72 mm (W) × 5.8 mm (H) |
| Display Colors | 65,536 (16-bit, 5R-6G-5B format) |
| Backlight | LED, 180 nits brightness (0–100% dimmable), >30,000 hours lifespan |
| Touch Panel | Resistive (RTP), >1 million touches |
| Operating Voltage | 4.75 V – 7.0 V DC (5V typical) |
| Current Draw | ~90 mA (5V, backlight 100%) / < 15 mA (Sleep) |
| Serial Port | TTL (3.3V logic, but 5V tolerant), 4-pin 2.54mm header |
| Baud Rate | 2400 – 921600 bps (9600 default) |
| Memory | 16 MB Flash, 1024 bytes EEPROM, 3584 bytes RAM, 1024 byte instruction buffer |
| microSD Card | Support max 32GB (FAT32 format) |
| Operating Temp | -20°C to +70°C |
| Weight | 25.8 g |
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