{"product_id":"handheld-serial-debugger-rs485-rs232-ttl-touch-tft-stm32","title":"Handheld Serial Debugger RS485\/RS232\/TTL 2.8\" TFT STM32","description":"\u003ch2\u003eHandheld Serial Debugger — RS485 \/ RS232 \/ TTL with 2.8\" Touch TFT Screen\u003c\/h2\u003e\n\u003cp\u003eTake 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.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3-in-1 Interface:\u003c\/strong\u003e Supports RS485, RS232, and TTL serial protocols (one interface selectable at a time) for maximum compatibility with external devices.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.8\" Touch TFT Color Display:\u003c\/strong\u003e Full on-screen keyboard with uppercase \u0026amp; lowercase letters, numbers, and common special characters for easy data entry.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Speed Communication:\u003c\/strong\u003e Supports baud rates of 4800, 9600, 19200, 57600, 115200, and up to 1,500,000 bps — 6 selectable options.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenerous Battery Life:\u003c\/strong\u003e Built-in 3.7V 2700mAh lithium battery keeps you working through extended debugging sessions without tethering to a power source.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePowered by STM32F103RCT6:\u003c\/strong\u003e Stable 32-bit ARM main control chip ensures reliable, fast serial data transceiving.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Power Output:\u003c\/strong\u003e Onboard 5V and 3.3V power output interfaces to conveniently power connected devices.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharacter \u0026amp; HEX Support:\u003c\/strong\u003e Both transmit and receive areas support character or HEX data display, with a toggle switch for each.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceive Area Highlights:\u003c\/strong\u003e 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.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmit Area Highlights:\u003c\/strong\u003e 2-line data display; max 35 characters or HEX bytes per line; one-click clear; CR+LF append button; dedicated SEND button.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTactile Buzzer Feedback:\u003c\/strong\u003e Onboard buzzer for touch feedback (disabled by default; enable via BEEP button).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ RS232 \/ TTL\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.8-inch Touch TFT Color Screen\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMain Chip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSTM32F103RCT6 (32-bit ARM)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.7V 2700mAh Li-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V \u0026amp; 3.3V Interfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBaud Rates\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4800 \/ 9600 \/ 19200 \/ 57600 \/ 115200 \/ 1,500,000 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Baud Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eData Modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCharacter \u0026amp; HEX\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReceive Buffer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17 lines real-time + 50 lines historical\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Handheld Serial Debugger\u003c\/li\u003e\n  \u003cli\u003e1× Touch Pen \/ Stylus\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: 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.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eFor more information on serial communication standards and best practices, visit the \u003ca href=\"https:\/\/www.nist.gov\/communications-technology-laboratory\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Communications Technology Laboratory\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can this handheld serial debugger work with RS485, RS232, and TTL at the same time?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: What baud rates does this serial debugger support?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: How long does the battery last on a single charge?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003ch4\u003eQ: Does the debugger support HEX data display?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Can this handheld serial debugger work with RS485, RS232, and TTL at the same time?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — the device supports RS485, RS232, and TTL interfaces, but only one interface can be active (selected) at a time. 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