What is Bluetooth ? | Technologic Makers

A Wireless Protocol for Bluetooth Small Scale It is a method of wireless communication within 1-100 meters distance. The effective pulse of Bluetooth is 10 meters. However, it can be increased to 100 meters by increasing the energy of the power cell. Bluetooth works at 2.45 GHz. This technology was named after the King Harald Bluetooth, Denmark, next to 900 BC. Bluetooth 1.0 data transmission was the maximum speed of 1 megabit per second. At present, the maximum speed of Bluetooth 2.0 is 3 megabits per second.
Bluetooth protocol implementing devices or devices work by connecting two-way connections. Currently Bluetooth technology is being used in computers, mobile phones, gaming consoles, digital cameras, printers, laptops, and GPS receivers. This technology costs very little electricity. It is implemented through small-scale wireless waves. When you use a computer, sound system or telephone, the smallest types of devices are connected to each other. Each device has to connect with each other on a specific system by cable, radio signal, infrared, connector, plug, etc. There are several ways to connect each electronic device. For example: component cable, electric cable, ethernet cable, WiFi, infrared signal.
Data transfer from one device to another device is now easier than ever. One of the 'Bluetooth' connecting devices is called. The Bluetooth connection device is wireless and automatic. The device has many fun features that make our daily work process much easier.
What can be the problem if there is no blue-tooth?
There is no need for some devices to connect. How they will connect, by falsely cable or by wireless If the cable is used, different types of cable may be needed which can be 1,8, 8, 25, depending on the physical function of the cable. What amount of information can be sent at certain times? For example, 1 byte data can be sent at serial port once. On the other hand, more than 1-bit data transfers can be made at Parallel Port. Bluetooth is the only way to solve the problem.
How it works
Bluetooth technology transmits data through low power wireless waves. The frequency of 2.45 GHz (in fact from 2.402 to 2.480 GHz) is used in this communication system. For the instruments used in industry, science and medicine, the frequency of the aforesaid frequency has been determined. Now the question is whether the bluetooth creates a barrier to other wave-based devices? The answer is "no". Because the signal sent by Bluetooth is only 1 milligat, where the cell phone sends the signal up to 3 watts. That is, the low power signal of Bluetooth can not interfere with high power signals.
Bluetooth can communicate with 8 devices simultaneously. However, each device has to be located within the same circle of 10 meters radius, because Bluetooth technology operates at a maximum of 10 meters. Now the question is that the device with the A device is near two other machines Whether the Bluetooth communication between C and D is interrupted? (Because two people Answer: "No" is the answer to the same frequency using bluetooth technology. Because to solve this problem, Bluetooth uses a system that is known as "spread-spectrum frequency hopping". In this method, multiple devices do not use the same frequency. This does not interfere with each other's communication system. In this method, one machine randomly accepts 79 different frequencies from the frequent frequency and changes one after the other. In bluetooth, the transmitter changes frequency of 1600 seconds per second. It is impossible to send the information of the same frequency between multiple different devices at the same time.