Bluetooth and Wi-Fi are both methods that provide wireless communication, but the difference between the two mainly stems from what they are designed to do and how they are used. The main difference is that Bluetooth is primarily used to connect devices without using cables, while Wi-Fi provides high-speed access to the Internet.

    Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). Invented by telecom vendor Ericsson in 1994, it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

    Bluetooth is managed by the Bluetooth Special Interest Group (SIG), which has more than 31,000 member companies in the areas of telecommunication, computing, networking, and consumer electronics. The IEEE standardized Bluetooth as IEEE 802.15.1, but no longer maintains the standard.

    Bluetooth is a wireless technology standard that is used to exchange data over short distances (less than 30 feet but with development in this area about.), usually between personal mobile devices. This means that a Bluetooth-enabled device such as a smartphone is able to communicate with other Bluetooth devices, such as a wireless headset, mp3 player or printer. Bluetooth, therefore, acts much like a cord between the two devices by creating a secure, wireless personal area network in which these devices can communicate.

    Bluetooth has a wide variety of applications, and has boosted the convenience and functionality of portable devices by providing a simple way for them to interact with other Bluetooth-enabled devices. Bluetooth is considered a proprietary protocol because device manufacturers must license a number of patents in order to make and market a Bluetooth device with improvement and development  in Bluetooth 4.0, Bluetooth 4.1 , Bluetooth 4.2, Bluetooth 5.)

   Wi-Fi has some similar applications to Bluetooth, such as setting up a network or printing and transferring files. It is also a wireless standard, but rather than being designed to communicated between devices, it serves to wirelessly connect devices to the Internet or Ethernet networks such as a corporate local area network (LAN). Its range is quite a bit larger than the very short range within which Bluetooth devices communicate, as a Wi-Fi signal can be has a range of about 20 meters (66 feet) indoors and picked up  to 300 feet away outdoors. This means that a Wi-Fi-enabled device, such as a PC or smartphone, can connect to the Internet wirelessly when in a Wi-Fi "hotspot," or area in which a Wi-Fi signal may be accessed.

    Wi-Fi or WiFi is a technology for wireless local area networking with devices based on the IEEE 802.11 standards  and work dual-band  2.4Ghz and 5Ghz. Is the 5Ghz network more powerful. Wi-Fi is a trademark of the Wi-Fi Alliance, which restricts the use of the term Wi-Fi Certified to products that successfully complete interoperability certification testing.
   This WiFi hotspot can be a small area such as a single room, or may cover several miles if hotspots are allowed to overlap.  Wi-Fi hotspots continue to proliferate across companies, university campuses, restaurants, airports etc.


In the Bluetooth and Wi-Fi there is still much to develops and improves, it does not stop here.

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