{"product_id":"1-channel-usb-type-c-uart-relay-module-dc-5v-12v-rs232-ttl","title":"1-Channel USB Type-C UART Relay Module DC 5V\/12V RS232 TTL","description":"\n\u003ch2\u003e1-Channel USB Type-C UART Relay Module — DC 5V \/ 12V RS232 TTL Serial Switch\u003c\/h2\u003e\n\u003cp\u003eTake precise control of your electronics projects with this compact, versatile \u003cstrong\u003e1-Channel UART Relay Module\u003c\/strong\u003e. Available in both a \u003cstrong\u003eUSB Type-C (DC 5V)\u003c\/strong\u003e version and a \u003cstrong\u003eTTL232 (DC 5V\/12V)\u003c\/strong\u003e version, this relay board lets you switch loads from a PC, microcontroller, or any UART-compatible host device with ease. A built-in \u003cstrong\u003eLED power indicator\u003c\/strong\u003e gives you instant visual confirmation that the module is live and ready.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Version Options:\u003c\/strong\u003e Choose USB Type-C (5V) for direct PC connection, or TTL232 (5V\/12V) for microcontroller and embedded system integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUART Serial Control:\u003c\/strong\u003e Operates via standard UART protocol (RXD, TXD, GND) — easy to integrate with Arduino, Raspberry Pi, and other platforms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommunication Protocol:\u003c\/strong\u003e Baud rate 9600 kbps, 8 data bits, 1 stop bit, no parity. Each data frame contains 8 bytes; supports two-way data transmission.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Standby:\u003c\/strong\u003e Standby current (DC 12V) just 17mA; relay active draw of 48mA — efficient for always-on applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Power Indicator:\u003c\/strong\u003e Clearly shows module power status at a glance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e USB Version: 53 × 29 × 19 mm \/ 16g; TTL232 Version: 53 × 27 × 19 mm \/ 20g.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Voltage (USB)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Voltage (TTL232)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 5V \/ 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandby Current (12V)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eActive Current (12V)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB Type-C \/ TTL232 (RXD, TXD, GND)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBaud Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9600 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eData Frame\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 data bits, 1 stop bit, no parity, 8 bytes\/frame\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIndicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLED Power Indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize (USB Ver.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e53 × 29 × 19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize (TTL232 Ver.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e53 × 27 × 19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight (USB Ver.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight (TTL232 Ver.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRemote control \u0026amp; remote measurement systems\u003c\/li\u003e\n  \u003cli\u003eSmart home \u0026amp; home automation\u003c\/li\u003e\n  \u003cli\u003eAccess control \u0026amp; identification systems\u003c\/li\u003e\n  \u003cli\u003eWireless metering \u0026amp; data collection\u003c\/li\u003e\n  \u003cli\u003eIT \u0026amp; intelligent household appliance control\u003c\/li\u003e\n  \u003cli\u003eBaby monitoring systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Relay Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDue to lighting and screen differences, actual product color may vary slightly from images.\u003c\/li\u003e\n  \u003cli\u003ePlease allow ±1–3 cm tolerance due to manual measurement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor guidance on safe electrical component handling, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Electrical Safety Guidelines\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between the USB Type-C version and the TTL232 version of this relay module?\u003c\/h4\u003e\n\u003cp\u003eA: The USB Type-C version operates at DC 5V and connects directly to a PC or laptop via a USB Type-C cable, making it ideal for computer-controlled switching. The TTL232 version supports both DC 5V and DC 12V and uses RXD\/TXD\/GND pins for direct integration with microcontrollers like Arduino or Raspberry Pi.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What communication settings do I need to use with this UART relay module?\u003c\/h4\u003e\n\u003cp\u003eA: The module uses standard UART protocol with a baud rate of 9600 kbps, 8 data bits, 1 stop bit, and no parity. Each data frame contains 8 bytes and supports two-way (full-duplex) data transmission for reliable serial control.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this relay module be used for smart home automation projects?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. This 1-channel USB UART relay module is well-suited for smart home and home automation setups, access control systems, remote monitoring, wireless metering, and data collection — anywhere a serial-controlled switch is needed.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is any special driver or software needed to use the USB Type-C relay module with a PC?\u003c\/h4\u003e\n\u003cp\u003eA: The module communicates via standard RS232\/UART serial protocol. You may need a USB-to-serial driver depending on your operating system. Any serial terminal or custom software that can send UART commands at 9600 kbps should work. Please contact the seller for detailed protocol documentation.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between the USB Type-C version and the TTL232 version of this relay module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The USB Type-C version operates at DC 5V and connects directly to a PC or laptop via a USB Type-C cable, making it ideal for computer-controlled switching. 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