The characteristics of bluetooth 4.0 and bluetooth 3.0 what's the difference?

Bluetooth is a kind of wireless transmission technology for short distance communication support equipment, after years of development, we are already familiar with it, it is also indispensable in the mobile phone, computer and other electronic products module.

In life, wifi and bluetooth are the most important wireless transmission bands. With the development of technology, there are many devices based on wifi and bluetooth communication spectrum. For example, bluetooth speaker, router and other products. Wifi and bluetooth all use the same 2.4GHZ band, so what's the difference?

The development of science and technology, bluetooth technology is also constantly upgrading, bluetooth technology has been upgraded to 5.0 now, here we don't discuss bluetooth 5.0, because with more now or bluetooth 3.0 and bluetooth 4.0, then what is the difference between between them? To learn more about the 2.4ghz spectrum of bluetooth communication, it is necessary to select a suitable 2.4ghz wifi jammer for you. Knowing this band, you can make better use of the relevant equipment.

Bluetooth 3.0 standard

• New technology:
  On April 21, 2009, Bluetooth technology alliance (Bluetooth SIG) formally issued a new generation of standard "the Bluetooth Core Specification Version 3.0 High Speed" (the Bluetooth Core Specification Version 3.0), the most important improvements and Bluetooth 3.0 is "Generic MAC/Alternate PHY" (AMP), which is a new arrival of radio frequency technology, to allow the Bluetooth protocol stack for any task dynamically select the correct radio frequency.
• Speed increase:
  The data transmission rate for bluetooth 3.0 is increased to about 24 MBPS (you can call 802.11 wi-fi for high-speed data transmission when you need it). On the transmission speed, bluetooth 3.0 is eight times the bluetooth 2.0, can be easily used in video recorder to hd TV, PC to PMP, UMPC to printer data transmission between, of course, need to achieve this standard can realize functions of both parties.

Bluetooth 4.0 standard

Lower power consumption, more coverage

Bluetooth 4.0 specification on July 7, the official launch in 2010, the new version of the milestone is low power consumption, strengthen the equipment compatibility between different oems at the same time, and reduce delay, theoretical maximum transmission rate still is 24 megabits per second (i.e., 3 MB/s), effective coverage extended to 100 meters (the previous version of 10 meters).

Each generation of bluetooth standards has been upgraded, believing that electronic products such as phablets are full of momentum. Products with a higher version of the bluetooth standard can improve overall performance, such as a wider range of matches, higher transmission speeds, more energy saving, and so on.

Moderate bandwidth, low transmission power and complete dormancy mechanism resulted in the ultra-low power of bluetooth, bluetooth 4.0 BLE, but also reduced the standby power consumption to the microwatt magnitude, and start the lightning fast, don't like the wi-fi, start a need a few hundred milliseconds, drain system power consumption.

Wi-fi on 2.4 GHz only defines the 14 channels, and bluetooth 4.0 defines 79 channels, especially in China is population cluster floors, more smart home networking must have enough channels to avoid the same frequency interference. This one is over bluetooth. ZigBee defined 27 channels in 2.4 GHz, 868MHz and 915MHz, and it was easy to produce the same frequency interference with large area families.

The bluetooth self - networking reduces the coverage distance requirement, and the more nodes, the less the coverage blind area. Usually five or more of the bluetooth light bulbs or switches are basically equal to the whole family.

Bluetooth 4.2 has a theoretical bandwidth limit of 24Mb, which can transmit images or short video.

Bluetooth 4.2 can be directly connected to the Internet and has been reserved for future Internet standard IPV6.

Bluetooth, like wifi, is a wireless signal transmission. Currently, the main use is 2.4ghz. The wifi network already has 5GHz bands, 2.4GHZ and 5GHZ frequency band interference and anti-interference.