Tech Blog
Serial HMI Selection Guide: How to Choose the Right Serial Display?
Serial HMI Selection Guide
Serial HMI is an intelligent display module communicating via UART serial port, widely used in industrial control, medical devices, smart home and more.
1. Size Selection
| Application | Recommended Size | Typical Model |
|---|---|---|
| Handheld | 0.96~2.8 inch | OCMC Series |
| Industrial Panel | 3.5~5 inch | D Series |
| Medical Instrument | 4.3~7 inch | T Series |
| Large Terminal | 7~10 inch | H Series |
2. Resolution
- Segment LCD: Fixed content display (numbers, icons), lowest power
- Character Dot Matrix: Text display (16×2, 20×4), low cost
- Graphic Dot Matrix: Custom graphics (128×64, 240×128), flexible
- TFT Color: Complex UI (320×240~1024×600), best visual
3. Communication Interface
| Interface | Distance | Speed | Application |
|---|---|---|---|
| UART (TTL) | <1m | 115200bps | On-board |
| RS232 | <15m | 115200bps | Device-to-device |
| RS485 | <1200m | 115200bps | Industrial bus |
4. Touch Type
- Resistive: Low cost, glove-compatible, industrial use
- Capacitive: High sensitivity, multi-touch, consumer use
5. Operating Temperature
- Commercial: -20°C~+70°C (standard)
- Industrial: -30°C~+80°C (recommended)
- Wide temp: -40°C~+85°C (extreme)
Summary
- Determine size and resolution needs
- Choose interface based on distance
- Select touch and temperature rating for environment
- Contact us for free samples and technical support