USB to Serial Adapter- Use Applications


Serial Devices exist everywhere, in homes, offices, industrial facilities, Airports, Squad Cars serial devices are everywhere.(look behind you)Industrial-Site Serial has been a standard for communication for over 50 years. This technology is not going anywhere and not fast. RS232 communications has some limitations, Speed being the biggest one. USB to Serial adapters usually have a UART chip that only supports up to 230kbps transmission, the UART chip we utilize offers 920kbps transmission rate. YAY!  Serial controls, Conveyor belts, doors, Ham Radios, Sensors, Steno Machines, Medical Equipment, you name it there is most likely some kind of Serial adapter controlling it. With that being said why would you not want to use the best adapters available? There are adapters that Range from 5 dollars up to 99 dollars for a single port RS232 adapter. We at Coolgear believe there is a sweet spot with pretty much everything in the tech field, there is a price point that you can get a lot of the bells and whistles while staying price conscious and we have nailed it! Extremely high quality products at a Great Price.



We offer a few different types of USB to Serial RS232 Adapters, USBG-232mini USB to Serial Adapter Style, USBG-232 USB to Serial RS232 1ft Cable and USBG-232mm USB to Serial RS232 Converter 6ft integrated cable. USBG-232ss3These 3 USB to Serial adapters all use the same FTDI Chipset they just offer longer cable length and slightly different form factor for the USBG-232mini. We have offered these adapters for nearly 10 years, and we plan on selling them for atleast 10 more, our customers love these as they are extremely dependable. All these years and we have had very few defectives. ( less then .2 percent ) We do not build in defective obsolesce in our products, we hope our adapters live longer then we do!





Ham Amateur Radio:

PTZ Camera:



Heart Defibrillators:

Stenography machines:


CNC Machines:








Windows 10 IrDA update for November

Hi Everyone, Caleb here from Coolgear again. You may have noticed that Microsoft has put out a big update to Windows 10. Part of this update allowed the IRDA driver to correctly install, however it still doesn’t quite work correctly.

I’ve been in touch with the chipset provider and they have told me that this changes a lot of things about getting a new driver released. They wouldn’t go into technical details, but I was assured that they would have a new driver done by the beginning of the year. From there they would send it off to Microsoft for testing and to receive their “stamp of approval” so it can be publicly released. This process typically takes about 4 weeks, so we’re tentatively expecting a February 2016 release date for the driver.


April 2016 Update:

The chip manufacture and Microsoft are still silent on this, and our supplier has informed us they have no new information regarding a driver update.

Windows 10 and Infrared (IrDA)

Shortly before the release of Windows 10 we here at Coolgear downloaded the evaluation pre-release edition and tested many of our products against it.

One of the products found to work perfectly fine was the IRJOY USB to Infrared adapter. However, after Windows 10 was released to the public we had many customers contact us regarding problems so we again re-tested and confirmed the issue. At some point between the time we tested the pre-release in February-March and the final release of Windows 10 on July 29th, Microsoft made breaking changes to IrDA products.

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USB 3.0 Performance and Speed Variables

USB 3.0 Performance and Speed Variable – Why the Bottleneck?

Although USB technology has reached version USB 3.1 specification, we wonder about the bottleneck issues in data transference as with USB 3.0! Have you noticed your speeds are not quite as fast as you thought they would be? Hopefully we can shed some light on why the bottleneck or slower than expected speeds occur.

There Are Advantages to USB 3.0…

  • Speed of 5Gbps data or signaling rate; this in itself is a definite improvement over USB 2.0 High3ft. USB 3.0 Male to Male device cable Speed by 10X even with the bottleneck.
  • Wait time reduction has been minimized with Super-Speed.
  • Power usage has been optimized by removing device polling and decreasing inactivity powering devices.
  • It supports legacy devices requiring USB 2.0 by interacting with USB 2.0 host platforms.

These are significant performance upgrades to the USB 2.0 specification but have you noticed that the boasted 5Gbps data transferring never really reaches 5Gbps? Here is where the bottleneck and speed confusion comes into play, we know that the USB 3.0 specification has a theoretical bandwidth of 625 Mbps based on a 5GB data transfer rate, however, there’s a little thing called encoding that brings the USB 3.0 expected bandwidth down to about 500Mbps, that happens to be a 20% decrease of the expected performance!

What do I mean by encoding? To keep it simple, the USB 3.0 interface still needs to translate your information so it uses a line code (or Symbol Code) that takes up approximately 8 to 10 bits of processing. The translations are symbols that balance out the clock recovery variable in the transmission of data. There are a number of other variables including link flow control, packet structuring, and overhead protocols, these additional variables drag your expected performance down even lower than the 500Mbps mentioned above.

Don’t Count USB 3.0 Out!

Let’s not discount USB 3.0 from this information, with its bottlenecking issues; it is still significantly faster than its predecessor specification when connected to the proper host and peripheral.

There many PC manufactures that incorporate USB 3.0 technology into their systems, the difference between them is that not all computer manufacturer’s use the same motherboard or processors, this is not a standard but more proprietary to the manufacturer for competitive reasons on the computer market. Studies have shown that there is a definite inefficiency in the way that different motherboard controllers such as interrupts, isochronous functions, and bulk-only transporters effect overall performance of USB 3.0.

When USB 3.0 Isn’t USB 3.0

This title above may be a little confusing but what this means is that USB 3.0 in all its technological advances over USB 2.0 isn’t going to have the speed you want if your computer or peripheral isn’t capable of that speed. This is where USB 3.0’s backward compatibility comes in, if you are using a USB 2.0 product and your host port connection is USB 3.0, you will get USB 2.0 High Speed Data from it because the device is simply not capable of achieving a 500Mbps. USB 3.0 hubs with USB 2.0 peripherals connected to them will not process information beyond their USB 2.0 specification capability.

Note: It is important to note as commercial and industrial companies that when looking at USB speeds that only USB 3.0 host connections with USB 3.0 peripherals whether it’s a direct connection or through a USB 3.0 hub, will produce the estimated Super-Speed of USB 3.0.

CoolGear USB Peripherals Manufacturing

CoolGear – Leading the Way for Computer USB Peripherals Manufacturing

Computer Peripheral History

We’ve come a long way since the 60’s and on through the 90’s where USB and Serial technology have worked together to form what is probably the best combination of peripheral accessories having versatility for both commercial and industrial use.

Merging these two technologies has given new opportunity for electronic communication devices over the years and continues to expand beyond its original development. Whether it has been utilized by N.A.S.A and their space exploration, HP and their computers, or RedBox in its DVD delivery stations, the ever growing use for technology has been finding a way. Society’s need for a technologically dependant system will continue to grow in the form of Smart Homes, Industrial Automation, Commercial Communications, and Transit.

Determination and Success: New Technologies, Committed Customer Service, Drive to be the BEST!

CoolGear has been a force to be reckoned with in all USB and Serial peripheral areas of technology as a manufacturer and supplier of Data and Serial Communication products. From USB Hard Drive Bays, Hubs, Cables, and Enclosures, to single and Multi-Port Serial Add-on-Cards, Cable Adapters, and Industrial Equipment, CoolGear hands down is the best choice for your computer peripheral manufacturer.

Inspired by our visit to this year’s Consumer Electronics Show (CES 2015) in Las Vegas, our commitment in 2015 is stronger than ever to produce High-Quality products with advanced technology and new ideas to help our customers grow their industry’s businesses and become leaders themselves.

Our Products Include but are not limited to…

  • USB 2.0 High-Speed Cables and USB 3.0 Super-Speed Cables: Manufactured with high quality materials with and without screw-lock security for data transfer from 12Mbps to 5Gbps depending upon the application and cable used.
  • Lightning Fast Charging Cables: With Fast Charging capabilities, these cable have an 8-pin reversible connector for charging compatible mobile devices such as the iPhone , iPod, or other.
  • USB to Serial Adapters: The combined technology to translate serial communication signals through a cable to be interpreted at a USB Host.
  • USB 2.0 High-Speed and USB 3.0 Super-Speed Hubs: Transferring and in some cases battery charging simultaneously utilizing the functionality and capability of USB technology.
  • USB Charging Stations: Meant to be “computer-less” as a standalone product for charging PC Tablets and other Mobile Devices. These charging stations incorporate “Smart” technology diverting charging currents where needed.
  • Rack and Din-Rail Mountable USB Hubs: Geared towards industrial users, these USB hubs are generally constructed with an industrial-grade metal case and support a varying amount of port connections from 4 to 32. Some hubs may be cascaded to connect to 127 devices at one time.
  • Mountable Serial Adapters: Also geared towards industrial use, these Serial Adapters support RS-232/422/485 signals via DB-9 and or Terminal Wire Blocks through a USB connection and support multiple communication points on the adapter.
  • Serial PCI Express Cards: Newer Desktop computers are sometimes without serial ports, Serial PCI Express cards can be installed via an expansion slot to compensate for the lack of that technology.
  • SATA Hard Drive Adapters: These adapters are used for converting IDE hard drive(s) to SATA connection when one is not available.
  • SATA Cables: Data transmission cables via a SATA connection at up to 3Gbps rate of speed. The cables are auto latching and auto release for user friendly experience.
  • USB Screw-Lock Cables: Screw-Lock mechanisms are incorporated into various types of USB cables as an added measure against accidental disconnections limiting chances of data loss during operation.
  • USB Ethernet Hubs: Used for extending the networking connection to support video, printing, scanning, game control and more.
  • USB Wireless Infrared Adapter: Wirelessly transmit data from one device to another infrared device.
  • Gender Changers: Gender changers are used to change from a male to female in either USB or Serial signal communications. The can be in the form of modular format including DB25, Mini DIN, VGA, DB9, and DB15

Make CoolGear Your Computer USB and Serial Peripheral Provider for your business or industry this year!
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Taking advantage of USB 3.0 Spec

Taking advantage of expanding USB 3.0 technology?

Here’s what I mean, we all know or should know the new USB is USB 3.0!


Because what is now a predecessor USB specification, USB 2.0 will work from a USB 3.0 connection but its advantage isn’t in it backward compatibility, although that’s a plus if you are using an older version of the technology.

USB 3.0 SuperSpeed Information

  • SuperSpeed USB has a 5 Gbps signaling rate offering 10x performance increase over Hi-Speed USB.
  • SuperSpeed USB is a Sync-N-Go technology that minimizes user wait-time.
  • SuperSpeed USB will provide Optimized Power Efficiency. No device polling and lower active and idle power requirements.
  • SuperSpeed USB is backwards compatible with USB 2.0. Devices interoperate with USB 2.0 platforms. Hosts support USB 2.0 legacy devices.

The real USB 3.0 spec advantages are in its speed to process data whether that’s from a simple USB drive or full size external drive(s). Recently, within the last year, Toshiba who is a top player in the flash memory market has developed a USB 3.0 flash drive called TransMemory.

This flash drive has very high read and write speeds along with storage capacity. Why am I mentioning this particular piece of equipment?

The flash drive as mentioned is USB 3.0 spec. technology driven and I am giving this as an example of taking advantage of new technology to the market. Although this and many other flash drives on the market maybe fantastic and with ability far beyond those of older versions, you will only be able to use its full potential of read/write speeds if you are using a USB device that supports that kind of speed. This could be your PC, a USB 3.0 hub, or USB 3.0 cable, the point is that the USB 2.0 technology spec. just cannot perform in the same way USB 3.0 does.

In November of 2009 USB 3.0 consumer products were announced and became available for consumers by January 2010. The technology is growing and as of July 2013, USB 3.1 has been released called “SuperSpeed+”.

Taking advantage of this technology should be very high on your to-do list. CoolGear is a major manufacturer of USB and Serial electronics; we are keeping up with technology so YOU can take advantage of it!

Serial RS-232, RS-422, RS485 Adapters

The Serial RS-232 Signal Difference

RS-232, RS-422, RS-485 Information

We receive many support calls with regard which serial adapter is needed for a particular serial application. RS-232 connections are the physical interfaces in which one data bit of information is transmitted to serial communication devices such as modems, terminals, Ethernet devices and other various types of peripherals. It is the standard in serial communication. While higher speed capabilities have been developed using USB and Firewire, the standard DB-9 Pin serial port has remained in industry.

RS-232 DB-9 pin out diagram.

PIN SIG. Signal Name DTE (PC) DB-9 Pin out chart
1 DCD Data Carrier Detection IN
2 RXD Receipt of Data IN
3 TXD Transmit Data OUT
4 DTR Data Terminal Ready OUT
5 GND Signal Ground
6 DSR Data Set Ready IN
7 RTS Request to Send OUT
8 CTS Clear to Send IN
9 RI Ring Indicator IN

USB to Serial Adapters in general are manufactured in many forms from molded cables, mini adapters, single port, multi-port, industrial metal chassis, and plastic less rugged cases.

Serial Signal Difference

RS-232 Adapters

On the technical side of the differences, RS232 is a single-ended signal with a specification that allows for data transmission from one transmitter to one receiver at a fairly slow data rate of up to 20K bits/second over short distances of up to 50Ft. using a maximum data rate. RS232 signals are represented by voltage levels with respect to a system power / logic ground. The “idle” state has the signal level negative with respect to common (signal ground in chart above), and the “active” state has the signal level positive with respect to common.

RS-422 Adapters

RS-232 doesn’t interpret well when communicating at higher data rates and over longer distances in actual day-to-day usage environments. RS-422 compensates in its wiring compared to RS-232 to create “differential data transmission” or balanced differential signal.

RS-422 incorporates much better performance in most serial applications; using differential signals can help invalidate the effects of ground shifts and induced noise signals. These signals can sometimes appear as common mode voltages on a network; RS-422 recognizes this noise and produces a much clearer and accurate signal. Signal modes such as RS-422 and RS-485 can also be selectable via DIP Switch or Terminal Wire which is directly wired to a Terminal Block from an outside source.

The RS-422 differential data transmission is designed for 100Kbps and for transmitting at distances of up to 4000 Ft. RS422 is also designated for multi-drop “party-line” communication applications where there is only one driver connected to and transmits on, a “bus” of up to 10 receivers. See the RS-422 wiring diagram below:

USB to RS-422 Wire Diagram

Data Signals Supported by RS-422 and RS-485

  • RS-422 data signals: TxD-, TxD+, RxD+, RxD-, GND, RTS-, RTS+, CTS+, CTS-
  • RS-485 4-wire data signals: TxD-, TxD+, RxD+, RxD-
  • RS-485 2-wire data signals: Data-, Data+

RS-485 Adapters

RS-485 signal adapters are basically a go between from the converters to the terminal or PC using RS-485 signal levels, in other words, the format, speed, and protocol of the data during transmission is not governed by RS-485. The similarity between devices from various manufacturers does not assure compliance with the signal levels by itself. The RS-485 signal is a two wire system that is either a straight or twisted pair wiring construction with a maximum of 32 transmitters and receivers can be operated. RS-485 also keeps the 100Kbps over a length of 4000 ft. transmission rate that the RS-422 specification does. See the straight and twisted pair wire diagram below:

RS-485 Wire Diagram

Fortunately as mentioned in the beginning of this post, there are many different types of serial cables, adapters, or converters for completely different types of serial application uses. Because of the transmit and receive functions of all these serial signal types, troubleshooting data transmission if needed is generally done by reading the adapter’s RXD/TXD LED indicators if provided on the device.

Keeping up with USB Hubs

Keeping up with USB Hubs, their technological advantages, and increasing usage…

The USB Hub Challenge?

It can be challenging to keep up with the amount of information and equipment needed for any industry, CG-1600i-RM - 16-Port USB 2.0 Industrial Hub imagehaving the correct USB hub to empower that equipment is paramount to business operation.

We at CoolGear are finding more often than not that the need for peripherals through a Din-Rail or Rack-Mountable hub has increased in high end companies such as HP, Time Warner, and Redbox to keep up with consumer demands and system use.

We develop our industrial USB hubs thinking about the needs of various industries. We’ve started our new blog off with and introduction to our new USB 2.0 industrial hub, have a look at the details below and feel free to ask a question.

The CG-1600i-RM Industrial USB 2.0 16-Port Rack Mountable Hub, it is USB powered by an industrial-grade switching power supply and provides normal operation in wide ambient temperatures from -40°C to 70°C (-40°F to 158°F) operation in a harsh environments with 15Kv ESD protection. The hub is backward compatible with USB 1.1 and provides for full 500mA of power to each of the connected USB devices.

Technical Advantages – USB Hub Information

  • Adds 16 USB 2.0 ports for peripheral use
  • Industrial-grade metal case
  • DIN-Rail compatible mounting options
  • 19” Rack compatible mounting options
  • Over-current detection and protection on all ports
  • Provides 500mA @5VDC to all ports
  • Supports USB 2.0 transfer speeds of 480Mbps and backwards compatible with USB 1.1
  • Plug-And-Play; No software or extra drivers required
  • 15KV ESD protection
  • LED status indicators for hub power and port connections
  • Supports wide operating temperate range: -40 to 70C (-40 to 158F)

Who should be using 16-Port USB 2.0 Hubs?

As mentioned above, high end businesses are trying to keep up high demand processing, we’ve provided a list of industries we have provided for both in an industrial and commercial environment, these industries include but aren’t limited to:

  • Aerospace
  • Airlines or Aircraft
  • Broadcasting
  • Defense
  • Education
  • Electronics
  • Marine
  • Manufacturing
  • Publishing
  • Retail
  • Software Development and more.

CG-1600i-RM Rack Mountable USB 2.0 Hub

The rack mountable hubs are designed to go through a rugged environment and handle large amounts of data with USB devices such as portable storage devices, reaching speeds of up to 480Mbit/s at Hi-Speed per port, rack mounting the hubs allows the user to better organize their cabling system to support the devices connected to it. This particular hub is manufactured with screw lock mechanisms on each USB port including the upstream type “B” at the hub connection. Din Rail mounting is supported for flat surface mounts.

USB Hub Speed Information:

  • USB 1.1 speed from 1.5Mbps to 12Mbps
  • USB 2.0 backward compatible with USB 1.1 reaches speeds of up to 480Mbit/s Hi-Speed (in the example above this time is now cut to approximately 15 to 20 minutes at full bandwidth.)

The CG-1600i-RM operates at both USB 1.1 and USB 2.0 speeds; the above speed information is the standard specification for this version of the technology. The hub’s power input is 110-220V AC and is equipped with LED indicators for both power and USB port status while in use.

Check back often as CoolGear continues to keep up with technology, and keep you informed!

USB Serial ANDROID Tablet Support

CoolGear USB Serial Adapters work on Android Tablets. We tested it on our Google Nexus Tablet built by ASUS and it works Great!

Here is what you need:




NO ROOTING REQUIRED Just Connect the CoolGear USB Serial Adapter USBG-232 to the CG OTG Cable, then plug into your tablet. Both LEDS should blink which shows it has power and can Synchronize. Now download the Termianl Software once complete click Connect on the Slick Dev Labs Terminal Software and it should connect, on our test it showed up as adapter 2003. For Test purposes we connected our DB9 Gender Changer that is Jumpered on Pins 2 and 3 to use as a Loop back test. This terminal Software is Fully configurable by baud Rate, Parity, Data Bits and Stop bits.


You could use this adapter to gain Access into your Router, Arduino Duemilanove any other Terminal Based Device, this is a Dream for IT Department to gain access to your CISCO Router,  you wont have to carry your laptop anymore!


Android is a trademark of Google Inc.