Handheld Serial Debugger RS485/RS232/TTL 2.8" TFT STM32

Handheld Serial Debugger — RS485 / RS232 / TTL with 2.8" Touch TFT Screen

Take your serial data testing and development workflow wherever you go with this compact, battery-powered handheld serial debugger. Featuring a crisp 2.8-inch touch TFT color screen, a powerful STM32F103RCT6 32-bit ARM processor, and a built-in 2700mAh lithium battery, this tool lets engineers, makers, and technicians send, receive, and analyze serial data in the field — no laptop required.

Key Features

• 3-in-1 Interface: Supports RS485, RS232, and TTL serial protocols (one interface selectable at a time) for maximum compatibility with external devices.
• 2.8" Touch TFT Color Display: Full on-screen keyboard with uppercase & lowercase letters, numbers, and common special characters for easy data entry.
• High-Speed Communication: Supports baud rates of 4800, 9600, 19200, 57600, 115200, and up to 1,500,000 bps — 6 selectable options.
• Generous Battery Life: Built-in 3.7V 2700mAh lithium battery keeps you working through extended debugging sessions without tethering to a power source.
• Powered by STM32F103RCT6: Stable 32-bit ARM main control chip ensures reliable, fast serial data transceiving.
• Dual Power Output: Onboard 5V and 3.3V power output interfaces to conveniently power connected devices.
• Character & HEX Support: Both transmit and receive areas support character or HEX data display, with a toggle switch for each.
• Receive Area Highlights: View 17 lines of real-time data plus 50 lines of scrollable historical data; max 32 characters or HEX bytes per line; one-click clear; COM port pause/enable switch; auto line-wrap on CR/LF.
• Transmit Area Highlights: 2-line data display; max 35 characters or HEX bytes per line; one-click clear; CR+LF append button; dedicated SEND button.
• Tactile Buzzer Feedback: Onboard buzzer for touch feedback (disabled by default; enable via BEEP button).

Specifications

What's in the Box

• 1× Handheld Serial Debugger
• 1× Touch Pen / Stylus

Note: Due to differences in lighting and screen calibration, the actual color may vary slightly from product images. Please allow 1–10mm variance due to manual measurement.

For more information on serial communication standards and best practices, visit the NIST Communications Technology Laboratory.

Frequently Asked Questions

Q: Can this handheld serial debugger work with RS485, RS232, and TTL at the same time?

A: No — the device supports RS485, RS232, and TTL interfaces, but only one interface can be active (selected) at a time. This gives you flexibility to work with a wide range of devices while keeping communication clean and interference-free.

Q: What baud rates does this serial debugger support?

A: The device supports 6 selectable baud rates: 4800, 9600, 19200, 57600, 115200, and 1,500,000 bps (1.5 Mbps), making it compatible with virtually all standard serial communication applications.

Q: How long does the battery last on a single charge?

A: The built-in 3.7V 2700mAh lithium battery provides substantial runtime for fieldwork and bench testing. Actual battery life varies depending on screen brightness, buzzer usage, and the frequency of data transmissions.

Q: Does the debugger support HEX data display?

A: Yes. Both the transmit and receive areas include a HEX display toggle switch, allowing you to view and send data in either character or HEX format, making it ideal for protocol analysis and embedded systems development.