--- product_id: 422989304 title: "DSD TECH SH-UR01A USB Relay Controller for Computer and Laptop(1CH)" brand: "dsd tech" price: "€ 27.38" currency: EUR in_stock: true reviews_count: 8 category: "Dsd Tech" url: https://www.desertcart.pt/products/422989304-dsd-tech-sh-ur01a-usb-relay-controller-for-computer-laptop store_origin: PT region: Portugal --- # OMRON G5V-1 relay rated 1A@24VDC Silicon Labs CP2102N serial chip 1-channel USB relay control DSD TECH SH-UR01A USB Relay Controller for Computer and Laptop(1CH) **Brand:** dsd tech **Price:** € 27.38 **Availability:** ✅ In Stock ## Summary > ⚡ Power your automation with precision — control at your fingertips! ## Quick Answers - **What is this?** DSD TECH SH-UR01A USB Relay Controller for Computer and Laptop(1CH) by dsd tech - **How much does it cost?** € 27.38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/422989304-dsd-tech-sh-ur01a-usb-relay-controller-for-computer-laptop) ## Best For - dsd tech enthusiasts ## Why This Product - Trusted dsd tech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust OMRON Relay:** Reliable switching with 0.5A at 125VAC and 1A at 24VDC ratings for industrial-grade performance. - • **Seamless USB Control:** Effortlessly toggle devices via USB commands on Windows, Mac, and Linux. - • **Compact & Lightweight:** Sleek 2.56" x 1.46" x 0.98" design fits perfectly on any workstation or embedded system. - • **Dedicated Tech Support:** 1-year replacement and expert assistance within 24 hours keeps your projects on track. - • **Plug & Play Compatibility:** Native driver support ensures quick setup across multiple OS platforms without hassle. ## Overview The DSD TECH SH-UR01A is a compact USB relay controller featuring a single OMRON G5V-1 relay capable of switching up to 1A at 24VDC. Powered by the Silicon Labs CP2102N serial chip, it offers seamless serial communication via USB across Windows, Mac, and Linux platforms. Ideal for professionals seeking reliable, programmable device control with dedicated technical support and easy integration into automation workflows. ## Description Buy DSD TECH SH-UR01A USB Relay Controller for Computer and Laptop(1CH): Relays - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Works as expected, and works well. - Ok this is not a relay simply "on" when USB power is applied. The relay is controlled "ON/OFF" using serial commands, as many have already stated. I had no driver issue, as windows already had the driver - probably due to me installing many multiple devices in the past. I however wanted a simply Windows command line to turn the relay on or off. After lots of searching I made a batch file to simply turn on (or off) the relay. For those of you not wanting to use terminal programs, here is how I'm doing it through windows command line: (for the below ,the COM port my relay is installed to is COM8) 1st set the com port speed/info >mode COM8 BAUD=9600 PARITY=n DATA=8 2nd send the command >set /p x="AT+CH1=1" \\.\COM8 to turn it off, send the same command in line 2, but with AT+CH1=0 (not AT+CH1=1). I dont think you need to set the mode every time, but I put the 2 lines in a batch file just in case. So far its working exactly as I need it to. I made 2 batch files (1 for on, and 1 for off). Hope this helps someone. Review: Simply works - I do like it's simple operation but some might have trouble trying to communicate with it because the commands must be sent as a complete string, not one character at a time. A program like Putty didn't work for me when trying this out on windows but look for a program called Realterm, it lets you set up commands that can be sent with a click of the button. Commands: AT response OK a test to see if the device responds AT+BAUD=? response OK+BAUD=9600 AT+CH1=? response OK+CH1=0 or OK+CH1=1 depending on the current state of the relay AT+CH1=1 response OK+CH1=1 this closes the relay AT+CH1=0 response OK+CH1=0 this opens the relay Some things that might help somebody... I have this plugged into a machine running Ubuntu 20.04.6 The device is accessed at /dev/ttyUSBn where n is a number. The number n can change with reboot of the system. In a terminal you can list devices with "ls -l /dev/ttyUSB*" To get information about each of the devices listed, I have two for example /dev/ttyUSB0 /dev/ttyUSB1 Use command "udevadm info /dev/ttyUSB0" to get a bunch of info that will help you identify which is the relay, mine for example shows ID_SERIAL=Silicon_Labs_CP2102N... The relay might not respond due to permissions, you need to add your user to the dialout group then you will have access to communicate with it. You will need to "initialize" it I guess, sometimes after reboot it seemed I needed to do it, sometimes maybe not, but I do command "stty -F $1 9600 cs8 -cstopb -parenb" then I can communicate with it. If you want to test it from the command line and see the response, I use something like this for example if my relay is connected at /dev/ttyUSB1 then I use: echo -ne 'AT+CH1=?' > /dev/ttyUSB1; read INPUT < /dev/ttyUSB1; echo $INPUT That would be the command to show the current status of the relay, substitute other commands as needed, that should execute the command and display the response. Using the various linux commands I listed above, I wrote scripts that read the list of devices to create a list of those that are /dev/ttyUSBn and then for each of them use the other commands to get their speed and id_serial so I know which device is at each of them, then initialize them, and shell scripts that take the port name as an argument and execute the relay_on and relay_off commands. Hopefully someone finds this information useful. ## Features - USB Relay Controller:With this USB Relay controller, you can control the switch on your PC or laptop. - Silicon Labs CP2102N Serial Chip:You need to install the driver the first time you use it, and a virtual serial port will appear on your computer. You can send commands to the serial port to switch operations. - OMRON G5V-1 Relay: Rated load(0.5A at 125 VAC;1A at 24 VDC ) ;Max. switching voltage (125 VAC, 60 VDC) - Compatibility: This USB Relay Board is compatible with Windows 7, 8, 10 and various Linux OS and Mac OS. - Customer Support: DSD TECH provides permanent technical support and 1 year product replacement service for this USB Relay Controller. All questions will be answered within 1 working day. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09PYML6Q7 | | Audio Output Mode | Stereo | | Best Sellers Rank | #60,271 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #78 in Electrical Relays | | Brand | DSD TECH | | Compatible Devices | Laptop, Personal Computer | | Customer Reviews | 4.1 out of 5 stars 73 Reviews | | Hardware Connectivity | USB 2.0 | | Hardware Interface | USB 2.0 | | Hardware Platform | Personal Computer | | Item Dimensions L x W x H | 2.56"L x 1.46"W x 0.98"H | | Item Weight | 1.3 Ounces | | Manufacturer | DSD TECH | | Maximum Sample Rate | 192 KHz | | Model Number | SH UR01A | | Platform | Linux, Mac, Windows 7 | | Surround Sound Channel Configuration | 2.1 | | UPC | 794251082402 | | Unit Count | 1 Count | ## Product Details - **Compatible Devices:** Laptop, Personal Computer - **Brand:** DSD TECH - **Hardware Interface:** USB 2.0 - **Audio Output Mode:** Stereo - **Platform:** Linux, Mac, Windows 7 ## Images ![DSD TECH SH-UR01A USB Relay Controller for Computer and Laptop(1CH) - Image 1](https://m.media-amazon.com/images/I/61+MjIj97EL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as expected, and works well. *by J***6 on February 2, 2024* Ok this is not a relay simply "on" when USB power is applied. The relay is controlled "ON/OFF" using serial commands, as many have already stated. I had no driver issue, as windows already had the driver - probably due to me installing many multiple devices in the past. I however wanted a simply Windows command line to turn the relay on or off. After lots of searching I made a batch file to simply turn on (or off) the relay. For those of you not wanting to use terminal programs, here is how I'm doing it through windows command line: (for the below ,the COM port my relay is installed to is COM8) 1st set the com port speed/info >mode COM8 BAUD=9600 PARITY=n DATA=8 2nd send the command >set /p x="AT+CH1=1" \\.\COM8 to turn it off, send the same command in line 2, but with AT+CH1=0 (not AT+CH1=1). I dont think you need to set the mode every time, but I put the 2 lines in a batch file just in case. So far its working exactly as I need it to. I made 2 batch files (1 for on, and 1 for off). Hope this helps someone. ### ⭐⭐⭐⭐ Simply works *by H***W on October 10, 2023* I do like it's simple operation but some might have trouble trying to communicate with it because the commands must be sent as a complete string, not one character at a time. A program like Putty didn't work for me when trying this out on windows but look for a program called Realterm, it lets you set up commands that can be sent with a click of the button. Commands: AT response OK a test to see if the device responds AT+BAUD=? response OK+BAUD=9600 AT+CH1=? response OK+CH1=0 or OK+CH1=1 depending on the current state of the relay AT+CH1=1 response OK+CH1=1 this closes the relay AT+CH1=0 response OK+CH1=0 this opens the relay Some things that might help somebody... I have this plugged into a machine running Ubuntu 20.04.6 The device is accessed at /dev/ttyUSBn where n is a number. The number n can change with reboot of the system. In a terminal you can list devices with "ls -l /dev/ttyUSB*" To get information about each of the devices listed, I have two for example /dev/ttyUSB0 /dev/ttyUSB1 Use command "udevadm info /dev/ttyUSB0" to get a bunch of info that will help you identify which is the relay, mine for example shows ID_SERIAL=Silicon_Labs_CP2102N... The relay might not respond due to permissions, you need to add your user to the dialout group then you will have access to communicate with it. You will need to "initialize" it I guess, sometimes after reboot it seemed I needed to do it, sometimes maybe not, but I do command "stty -F $1 9600 cs8 -cstopb -parenb" then I can communicate with it. If you want to test it from the command line and see the response, I use something like this for example if my relay is connected at /dev/ttyUSB1 then I use: echo -ne 'AT+CH1=?' > /dev/ttyUSB1; read INPUT < /dev/ttyUSB1; echo $INPUT That would be the command to show the current status of the relay, substitute other commands as needed, that should execute the command and display the response. Using the various linux commands I listed above, I wrote scripts that read the list of devices to create a list of those that are /dev/ttyUSBn and then for each of them use the other commands to get their speed and id_serial so I know which device is at each of them, then initialize them, and shell scripts that take the port name as an argument and execute the relay_on and relay_off commands. Hopefully someone finds this information useful. ### ⭐⭐⭐⭐⭐ A few quirks but works, nice housing. *by S***Y on July 13, 2025* Bought this to replace a different USB relay that quit working after a month. PLUSES: +Plastic housing. No worries about shorting out the bottom of the PC board. So often you get a circuit board with NO mounting holes or other way to support it. +Wonder of wonders, IT SHIPS WITH A USER GUIDE! ON PAPER! What a concept! Minor gripes: -The housing on this is a little bigger than it needs to be. -The user guide makes no mention of the timing constraint for inputting control strings. Likely a lot of the reviews saying it doesn't work were a result of that. If I hadn't seen the reviews taking about the timing, I'd would have probably returned this. -It's a little weird for this to very loosely be emulating the old smart modem AT command set, but then trading away carriage return to terminate commands and using timing instead. The gripes are pretty minor vs the pluses. I hope this one lasts. ## Frequently Bought Together - DSD TECH SH-UR01A USB Relay Controller for Computer and Laptop(1CH) - Electromagnetic Power Relay, 8-Pin 10 AMP 24V DC Relay Coil with Socket Base, LED Indicator, DPDT 2NO 2NC - MY5NJ 2PCS [Applicable for DIN Rail System] - JESSINIE USB Serial Port Control Relay Module Sturdy Durable Lightweight USB Relay Module USB Intelligent Control Switch Overcurrent Protection Intelligent Command Control Switch Intelligent Home --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/422989304-dsd-tech-sh-ur01a-usb-relay-controller-for-computer-laptop](https://www.desertcart.pt/products/422989304-dsd-tech-sh-ur01a-usb-relay-controller-for-computer-laptop) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-04-23*