1-Channel USB Type-C UART Relay Module DC 5V/12V RS232 TTL
1-Channel USB Type-C UART Relay Module DC 5V/12V RS232 TTL
1-Channel USB Type-C UART Relay Module — DC 5V / 12V RS232 TTL Serial Switch
Take precise control of your electronics projects with this compact, versatile 1-Channel UART Relay Module. Available in both a USB Type-C (DC 5V) version and a TTL232 (DC 5V/12V) version, this relay board lets you switch loads from a PC, microcontroller, or any UART-compatible host device with ease. A built-in LED power indicator gives you instant visual confirmation that the module is live and ready.
Made in Mainland China.
Key Features
- Dual Version Options: Choose USB Type-C (5V) for direct PC connection, or TTL232 (5V/12V) for microcontroller and embedded system integration.
- UART Serial Control: Operates via standard UART protocol (RXD, TXD, GND) — easy to integrate with Arduino, Raspberry Pi, and other platforms.
- Communication Protocol: Baud rate 9600 kbps, 8 data bits, 1 stop bit, no parity. Each data frame contains 8 bytes; supports two-way data transmission.
- Low Power Standby: Standby current (DC 12V) just 17mA; relay active draw of 48mA — efficient for always-on applications.
- LED Power Indicator: Clearly shows module power status at a glance.
- Compact Form Factor: USB Version: 53 × 29 × 19 mm / 16g; TTL232 Version: 53 × 27 × 19 mm / 20g.
Technical Specifications
| Channels | 1 |
| Working Voltage (USB) | DC 5V |
| Working Voltage (TTL232) | DC 5V / 12V |
| Standby Current (12V) | 17mA |
| Active Current (12V) | 48mA |
| Interface | USB Type-C / TTL232 (RXD, TXD, GND) |
| Baud Rate | 9600 kbps |
| Data Frame | 8 data bits, 1 stop bit, no parity, 8 bytes/frame |
| Indicator | LED Power Indicator |
| Size (USB Ver.) | 53 × 29 × 19 mm |
| Size (TTL232 Ver.) | 53 × 27 × 19 mm |
| Weight (USB Ver.) | 16g |
| Weight (TTL232 Ver.) | 20g |
Common Applications
- Remote control & remote measurement systems
- Smart home & home automation
- Access control & identification systems
- Wireless metering & data collection
- IT & intelligent household appliance control
- Baby monitoring systems
What's in the Box?
- 1 × Relay Module
Notes
- Due to lighting and screen differences, actual product color may vary slightly from images.
- Please allow ±1–3 cm tolerance due to manual measurement.
For guidance on safe electrical component handling, refer to OSHA's Electrical Safety Guidelines.
Frequently Asked Questions
Q: What is the difference between the USB Type-C version and the TTL232 version of this relay module?
A: 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.
Q: What communication settings do I need to use with this UART relay module?
A: 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.
Q: Can this relay module be used for smart home automation projects?
A: 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.
Q: Is any special driver or software needed to use the USB Type-C relay module with a PC?
A: 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.