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Description
Brainboxes 2 Port RS232 USB to Serial AdapterThe Brainboxes 2 Port RS232 USB to Serial Adapter delivers fast, reliable RS232 connectivity directly from a USB port. Designed for professionals who need dependable two channel serial communication, it provides two independent RS232 serial ports on a single USB bridge. With data transfer rates up to 921,600 baud, sizeable FIFO buffers, and robust 1 Mbit line drivers, this adapter handles demanding applicationsfrom industrial automation and scientific
The Brainboxes 2 Port RS232 USB to Serial Adapter delivers fast, reliable RS232 connectivity directly from a USB port. Designed for professionals who need dependable two-channel serial communication, it provides two independent RS232 serial ports on a single USB bridge. With data transfer rates up to 921,600 baud, sizeable FIFO buffers, and robust 1 Mbit line drivers, this adapter handles demanding applications—from industrial automation and scientific instrumentation to point-of-sale and data logging—without compromise. The high-retention USB connection ensures your laptop or PC stays securely connected, even on busy travel setups, while driver support across major operating systems makes installation effortless.
- Two RS232 ports on a single USB device – Add dual, fully independent serial channels to your computer, enabling simultaneous communication with two devices such as PLCs, modems, barcode scanners, or cash registers without juggling multiple adapters or USB ports. Each port operates as a separate serial channel, maintaining isolation and reliable data transfer for complex workflows.
- High-speed data transfer up to 921,600 baud – Perfect for applications that demand rapid, continuous data streaming. Whether you’re logging high-frequency sensor data, commanding machinery, or transferring large blocks of data between legacy equipment and modern systems, this adapter keeps pace with demanding serial workloads.
- Robust FIFO buffers for stability – The 128-byte transmit FIFO and the 384-byte receive FIFO minimize data loss during peak throughput or CPU load spikes. This generous buffering helps maintain steady communication and reduces the risk of dropped characters in busy environments, ensuring accurate and reliable data capture.
- 1 Mbit line drivers for clear signaling – Strong RS232 signaling improves integrity over longer cables and in electrically noisy settings. The high-drive capability supports longer runs to devices that require robust voltage levels, delivering dependable performance in industrial or lab environments.
- Secure, high-retention USB connection with broad OS support – The USB interface is designed for a secure, durable connection that stays put during use on laptops and desktop machines. It works with Windows, macOS, and Linux through provided drivers, enabling plug-and-play setup across diverse systems and reducing setup time.
Technical Details of Brainboxes 2 Port RS232 USB to Serial Adapter
- Ports: 2 x RS232 serial ports
- Interface: USB 2.0 High Speed, bus-powered
- Baud rate support: Up to 921,600 baud
- FIFO buffers: Transmit 128 bytes; Receive 384 bytes
- Line drivers: 1 Mbit signaling
- Power: USB bus-powered (powered by the host USB port)
- Compatibility: Windows, macOS, and Linux operating systems with supported drivers
- Port connectors: RS232 serial ports for standard serial communication
- Physical design: Compact, rugged enclosure suitable for desktop or field use
How to install Brainboxes 2 Port RS232 USB to Serial Adapter
- Connect the adapter to an available USB port on your computer. The device is designed to be bus-powered, so no external power supply is required for normal operation.
- Install the appropriate drivers for your operating system if prompted. Brainboxes provides driver support for Windows, macOS, and Linux to ensure full functionality of both RS232 ports. In many cases, modern OSes will auto-detect the device and complete the installation automatically.
- Once the drivers are installed, connect your RS232 devices to the two serial ports using standard RS232 cables. Ensure devices are powered and configured with compatible serial settings.
- Open your application or terminal software and configure each port (for example, COMx on Windows or /dev/ttyUSB0 and /dev/ttyUSB1 on Linux/macOS) with the required baud rate, data bits, parity, and stop bits. If you need hardware flow control, enable RTS/CTS as required by your equipment.
- Test the connection by sending and receiving data across both ports. If you experience issues, verify cable integrity, port settings, and ensure no conflicting device drivers are loaded for other USB-to-serial adapters on the same system.
Frequently asked questions
-
Q: How many RS232 ports does this adapter provide?
A: It provides two independent RS232 serial ports on a single USB-to-serial adapter. -
Q: What is the maximum baud rate supported?
A: The adapter supports baud rates up to 921,600 baud for high-speed serial communication needs. -
Q: Which operating systems are supported?
A: Windows, macOS, and Linux are supported, with drivers provided by Brainboxes to ensure full functionality. -
Q: Is the device bus-powered?
A: Yes, the adapter is powered through the USB connection, eliminating the need for an external power supply for standard use. -
Q: Do I need special cables?
A: You can use standard RS232 serial cables to connect devices to either port. Ensure cables are appropriate for the required cable length and signal quality. -
Q: Can I use both ports simultaneously?
A: Yes. The design supports simultaneous operation of both RS232 channels for parallel communication with two devices. -
Q: Are there any driver-free (USB CDC) options?
A: Availability of driver-free modes depends on the operating system and Brainboxes’ supported configurations; most users will install the official drivers for full functionality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
It Works!
Size: Full-size Truck, SUV
When I bought my vehicle it didn't come with a spare. I knew what I was in for. I was on my way to an important meeting and as fate would have, the tire pressure indicator reported a flat. I imagined the worst but experienced the best!
The directions said to let all the air out of tire and remove the valve stem core, it seemed like I was making a bad situation worse. Then it said to attach the tube to the stem and squeeze the contents into the tire. I thought "this is never going to work" the fluid seemed too watery to seal anything, but I followed instructions, I reinstalled the valve core and reinflated the tire, and it worked!
I expected it to leak immediately, it didn't. It lasted all day and most of the next day until I could get the tire to the shop. They removed a nail and patched the hole, overall I'm very satisfied, I bought a replacement right away, just in case!
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Better than the green goo
Size: Full-size Truck, SUV (2-pack)
Recently, while I was at work, I noticed that I had at some point run over a nail with my car. Normally, you'd take your car to the tire shop and let them plug the hole for you. Well, the only problem was that the nail decided that it was going to poke my tire where the sidewall meets the tread, and most shops will refuse to plug a tire when it's punctured there. Makes sense, it's a liability issue for them, so I can't blame them. That still leaves me with the problem of having a tire with a nail in it. So, I could either replace the tire with either a new or used tire, which is expensive or I can try using a sealant to try and get as many miles out of my tire as I can.
In the past, I had tried using the green goo sealant on nail holes, and while it works to get you 15 miles down the road, that's about it. Now, while TireJect doesn't recommend using their product on punctures on the shoulder of the tire, I decided that I'd give it a try to see if it would work. And as of writing this review, it's been about 10 days since I put TireJect in my tire, and so far, it hasn't leaked any air, despite it not being meant for the shoulder. When money isn't so tight, I'll probably go ahead and replace the tire, especially since there's only about 4/32 tread depth left, but for the time being, I'll keep running it, and hopefully it keeps holding pressure properly like it has been.
Now, as for how easy it is to use, the only tools you will need that aren't provided, is an air compressor to allow you to re-inflate the tire. The kit comes with everything else you will need, including a valve core removal tool and a syringe to add the sealant to your tire. To use this product, you will first need to carefully remove the valve core with the provided tool, careful not to lose the core, since it doesn't come with a replacement core. After that, thread the hose on the syringe on to your valve stem, and then carefully add the required amount of sealant to the syringe. If you accidentally spill some, wipe it off before it dries, so that it doesn't stain anything. From there, just push the goo into the tire with the plunger, adding more to the syringe as necessary. When you're all done, re-install the valve core into the valve stem snuggly, careful not to over-tighten, and air up the tire to the recommended PSI with your compressor. After all that is done, go take a short, slow drive to distribute the sealant, and then recheck your air pressure.
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Reviewed in the United States on July 29, 2025
★★★★★ 1
TPMS Compatability is a LIE
Size: Sedan, Crossover, Small Truck
2018 Subaru Impreza, with one tire with a slow leak (about 2 PSI a week) that I couldn't trace.
I bought the "Full-Size Sedan, Small Truck, Crossover" kit (the 6 oz. pouch) based on my tire size, 225/40/18.
After I removed the valve core, attached the dispensing hose and opened the cap, the product would not flow into the tire. I squeezed the pouch, but that only made the product leak out around the valve stem onto the wheel and driveway. I tried rotating the tire so the valve stem was at the top, and and also at the bottom. I even took the wheel off so I could get a fully vertical flow. Nothing worked. I finally gave up after only about half the product was dispensed, and I do think most of it went somewhere other than in the tire.
I reinstalled the valve core, remounted the wheel, plugged in my little lighter socket-powered compresseor, and tried to inflate the tire. And ... NOTHING. The pressure reading on the compressor immediately shot up to over 100 PSI, and it automatically shut off. Tried multiple times, with the same result. I again removed the valve core, and a) no air came out of the tire when I removed it, and b) even with no valve core the compressor still would not pump air into the tire. Clearly the gunk had completely blocked the valve/TPMS.
Fortunately, when I took the tire to Costco (where I'd bought it), they were able to fix the damage I'd done, as well as patching a small nail hole in the tread I hadn't seen (that was clearly the source of the slow leak) for no charge. Since I've already submitted a refund request, ultimately all it really cost me was my time and effort ... and a whole lot of stress.
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Reviewed in the United States on November 26, 2024
★★★★★ 5
Forget the gooey stuff, this product WORKS! See UPDATES 1 and 2
Size: Compact Car, Mid-size Sedan
I've had a slow leak in one of my tires for some time. It's a common thing with chrome plated alloy wheels, they get corrosion on the bead area where the tire seals and then you get a slow leak. This was the only product which is water soluble so it's not going to make a permanent mess inside the tire; additionally, it contains tiny bits of Tufsyn which is the material some tires are made from. So it's not just a liquid that is sealing the leak, it's tiny bits of rubber. I was putting 5 or 6 lbs of air in my tire every few days, and I could see that the tire was getting low. I installed this TireJect per the instructions a week ago and the tire appears to be doing great, despite the fact that we've had some very cold weather. (I didn't want to check it with a gauge while it was this cold out because just in case the tire's valve didn't seal all the way; I'll check with a gauge when this cold snap is past.) While I can't say for 100% sure that there is no more leak, I suspect that the leak has been sealed up completely. This is a product unlike the others and I think it's worth the price.
FIRST UPDATE: It has been two months and I haven't had to add any air at all to the tire where I used this product. There was a slow rim leak which was losing about a pound or so per day and it has been totally fixed. The car has sat for several days a few times, including in single digit cold weather, as well as driven regularly otherwise, and the tire hasn't lost any air. I think it's the micro Tufsyn fibers in this product which seal leaks better than some goopy glue stuff other brands are made of. I totally recommend this product!
SECOND UPDATE - it's been eleven months since I added this to my tire with the slow rim leak and I have not had to add air a single time. Not once. THIS STUFF WORKS. Forget the slime and foam and get this.
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Reviewed in the United States on December 5, 2024
★★★★★ 5
Good
Prefect. It’s exactly what my lawnmower needed.
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Reviewed in the United States on May 2, 2026