How to buy your own Bluetooth adapter

Analysis from the Bluetooth Technology:

1. Distance: many sellers on the market announced support for 20 m, 30 m, 50 m, etc. In fact, this is the distance from Bluetooth support for sellers.
Is there two standard classes? 1 and class? 2, class? 1 supports a standard distance of 100 m and class2 supports a distance of 10 m. In fact, the distance is not
In the case of obstacles, class? 2 can support up to 10-20 meters, class? 1 can support 80-90 meters, while some sellers advertise 30 m, 50 m, and other distance is not this
Standards, so you must check whether the seller is promoting the purchase;

2. Transfer file size: Regular Bluetooth adapter in PC-PC or
There is no size limit for transferring files between PCs and mobile phones. If you are not buying a regular Bluetooth adapter, there is usually a file size limit during file transfer, generally, the file size is 5 MB.
3. Driver Software options: Bluetooth adapters sold on the market use the most IVT and widcom drivers, of which more than 80% use the IVT driver and widcom software.
It is rarely used. If you want to verify that the Bluetooth adapter you bought has formal authorization, you can upgrade it to the IVT? For Versions later than 2.0 and later, the address code verification function is available online.

　
3. From the Bluetooth hardware analysis: the Bluetooth version: From the earliest V1.1 to the current v1.2 and V2.0, V1.1 and v1.2 there is no essential difference, just for the stereo v1.2 Ratio
V1.1 supports better performance. The EDR function is added to V2.0, so the transmission speed of the previous kbps is increased to 3 mb. the application scope of V2.0 is mainly to build a bluetooth wireless LAN.
And wireless data transmission through Bluetooth, it is generally of little significance in the selection of Mobile Phone applications (mobile phones mainly support v1.2, of course, if mobile phones support 2.0, then the choice of Version 2.0 can ensure high-speed transmission
Hardware structure of the Bluetooth adapter: the main difference between a regular Bluetooth adapter is whether it has a unique valid address code.

4. Service: Products of regular manufacturers should
This provides detailed services. Because mobile phones now support a large number of Bluetooth features and different ways of use for each phone, regular manufacturers should be able to help you solve the difficulties encountered in use, so they have
After-sales service telephone, while the simplified version does not provide quality and after-sales service assurance. Therefore, when selecting a Bluetooth adapter, you should try to consult in detail to determine whether the purchased Bluetooth adapter is a compliant product.

5. When purchasing the service, check whether the service is officially certified by bqb and Ce. If not, you may have some problems in terms of security and compatibility. The above is my summary of some experience in using and purchasing Bluetooth adapters, hoping to help you.

1. What is a Bluetooth adapter:
 
 
Most of the Bluetooth devices we use usually need to communicate data with computers. For example, we can transmit images, videos, ringtones, and other resources to our mobile phones through Bluetooth, you can use Bluetooth to connect multiple media
Body resources are transmitted to PSP, MP4, and other digital products. How Can computers establish connections to these products through Bluetooth? This requires a small Bluetooth adapter that is installed on your computer.
To complete the Bluetooth transmission connection.
Conclusion:
The data communication between a computer and a bluetooth device is inseparable from the Bluetooth adapter. Even if some laptops have Bluetooth functions, they also have built-in Bluetooth adapters.

Ii. Selection of Bluetooth standards:
 
 
The transmission speed of a bluetooth device is determined by the working bluetooth standard. Currently, the most commonly used Bluetooth standards include Bluetooth 1.1, Bluetooth 1.2, and Bluetooth 2.0. Bluetooth 2.0 is the first two in terms of speed
Therefore, we should select the Bluetooth 2.0 adapter, which is guaranteed in speed and backward compatible with the 1.1 and 1.2 standard devices.
Conclusion:
Select a Bluetooth adapter that supports the Bluetooth 2.0 wireless transmission standard.

3. Bluetooth interface selection:
As mentioned at the beginning of this article, we generally use the most popular Bluetooth devices, mainly including the USB interface and the PCMCIA Interface. Among them, the USB interface is the most widely used. After all, each computer is equipped with a USB interface, the PCMCIA Interface only exists in the notebook.
Therefore, for external Bluetooth adapters, we should first choose the Bluetooth adapter for the USB interface and purchase a device that supports USB 2.0 at the interface speed. After all, the transmission speed of 2.0 is much higher than 1.1, it can ensure that Bluetooth 2.0 maximizes its data transmission advantages.
Conclusion:
Select a Bluetooth adapter that supports the USB 2.0 interface.

Iv. Selection of bluetooth chips:
Of course, in addition to the above multiple technical parameters, the core chip selection of the Bluetooth adapter is also very critical. With my years of experience using multiple Bluetooth adapters, the CSR (Cambridge silicon wafer radio technology company) has the best stability among many bluetooth chips.
In addition, many readers may not pay too much attention to the single chip or dual chip of the device when purchasing the Bluetooth adapter. As far as technology is concerned, the single chip product has no problems, it is better than dual-chip in terms of compatibility. However, single-chip Bluetooth is more stable and low-power, and only a few large manufacturers, such as CSR and Ti, can do so.
Conclusion:
If you choose a Single-Chip Core Bluetooth adapter, you 'd better purchase the CSR-based fourth-generation chip product.

5. Selection of Bluetooth extension technology:
Some readers may not care too much about the extension technology when choosing a Bluetooth adapter, which is very wrong. Although the transmission speed brought by the Bluetooth 2.0 technology is very good, you still need to pay attention to whether the Bluetooth adapter supports EDR, in general, the 2.0 standard combined with the EDR supplemental protocol can increase our wireless transmission speed to a new level.
Conclusion:
Because not all adapters supporting the Bluetooth 2.0 standard support EDR technology, we should select products that support EDR technology so as to maximize the functions and effects of the Bluetooth Product.

6. Fans of using tools to crack the adapter speed:
Some readers may wonder how to know the real speed of the Bluetooth adapter? How can we determine whether the system supports the 1.1, 1.2, or 2.0 standard? Don't worry. Here we recommend you a small tool. Through this small tool, we will not be confused by the gorgeous advertising words and JS exaggerated words.
This software is actually a tool for detecting computer hardware running speed and working condition, but we can use it to detect the actual working speed of the USB interface connected to the Bluetooth adapter, if the transmission speed reaches the USB 2.0, it indicates that the Bluetooth adapter is based on the 2.0 standard, otherwise it must only support the 1.1 or 1.2 standard products.
 
 
After downloading and installing the astra32 tool, we can find the USB interface of the corresponding Bluetooth adapter in the hardware list, and view its specific speed in the test result window on the right of the software,
If the value reaches 480 Mbit/s, it indicates that the USB interface is fully functional at a speed of 2.0, and the Bluetooth adapter is naturally based on the 2.0 standard product.

Conclusion:
If the speed of the USB interface reaches 480 Mb/s, the Bluetooth adapter supports the 2.0 standard. Otherwise, it can only be regarded as a low-speed adapter.

7. How to choose a Bluetooth adapter from distance misunderstanding:
I often hear that some users are pursuing the distance indicated in the instruction manual when selecting a Bluetooth adapter. In fact, this distance is just a reference, products with 100-meter Bluetooth adapters cannot really reach 100 meters.
 
As we all know, the Bluetooth products can be divided into Class 1 (100 m) and Class 2 (20 ~ 30 m) and Class
3 (10 meters) three different types, and the Bluetooth Product chip can really determine the actual launch distance of the product, so even if you buy a Bluetooth adapter that supports class
1. Your bluetooth device does not support white match.
Only your Bluetooth adapter and Bluetooth products Support class.
1 can reach a transmission distance of 100 meters. However, we cannot see such support Class in the market.
1. Mobile phone or PDA. Even more power consumption is required to reach 100 meters, which will greatly shorten the battery time of mobile devices. Therefore, buyers should not blindly pursue 100 meters of Bluetooth.
Conclusion:
The transmission distance is enough, and there is no need to blindly pursue a 100-meter long-distance Bluetooth transmission device.

8. Driver options:
 
 
If you want your Bluetooth adapter to work properly, you should correctly install the corresponding driver, and some large factory device drivers can be automatically identified and installed by the operating system, this saves us the trouble of installing the driver.
In addition, do not install multiple Bluetooth management tools at the same time, so that compatibility conflicts may occur between different Bluetooth management tools, thus affecting the normal use of devices.
Conclusion:
You only need to install a Bluetooth management tool on your computer. In addition, when purchasing a bluetooth device, try to select a large brand product. Otherwise, you will try your best to install the driver.

IX. Summary:
 
 
Although the price of the Bluetooth adapter is less than 100 yuan, improper selection affects the actual use of the user, on the other hand, it also becomes a big nut to buy low-performance products at a high price. This document describes
When selecting a Bluetooth adapter, you need to pay attention to the key points and several main parameters. I hope this article will help more friends to choose their desired products.