The transmission of data between different digital devices is usually not a problem. Bluetooth LE 5.0 module provides you have the right connection cable at hand. If this is not available, you have to take the long detour via WLAN or the cloud. It is to be able to share the photos from last evening with your friends, for example.
But there is another method that makes transferring pictures, videos, and audio files very easy. The name: Bluetooth. The possible uses: almost unlimited.
Table of contents
What is bluetooth and what is it common for?
Why is there bluetooth?
How does bluetooth work?
The bluetooth chip
The bluetooth connection
The term bluetooth LE 5.0 module describes a network technology. It is the IEEE 802.15.1 working group of the US Institute of Electrical and Electronics Engineers raised to an industrial standard for radio connections. Bluetooth is common for connectionless or connection-oriented point-to-point transmission of voice and data between various digital end devices.
The main goal of the technology is to replace cable connections. It is to make them completely obsolete. This is particularly advantageous for mobile devices such as smartphones and tablets.
"Connectionless" means that a transfer initiates immediately. Similarly, it comes even without the recipient having indicated that it is ready to accept a data packet. In a "connection-oriented" method, on the other hand, a virtual connection establishes between the communicating devices before the actual data transfer.
Compared to other transfer technologies such as:
Moreover, it comes as well as a simple and energy-saving connection establishment.
Since only lower transmission speeds is easy to achieve in comparison to the other techniques mentioned. This sends overly large data packets can take a little longer. For individual files or less complex services and applications. However, Bluetooth is undoubtedly the ideal solution.
The invention of bluetooth LE 5.0 module stems from the well-known problem of the "tangled cables": Since the 1980s, attempts come by various means to replace conventional, wired connection technologies with wireless alternatives. Furthermore, a promising candidate was infrared technology.
Bluetooth LE 5.0 module was common for the communication of computers with printers. However, the relatively high power consumption and the need to establish and maintain direct “visual contact” between the devices to be connected prevented the technology from gaining acceptance.
In the 1990s, a consortium made up of electronics companies Ericsson, IBM, Intel, Nokia and Toshiba set up the Bluetooth Special Interest Group (Bluetooth SIG for short) to develop its own technological solution. "Bluetooth" was only the code name of the project at this point, but in the absence of other suggestions, it was soon adopted as the final brand name.
Bluetooth standards and drive the development of wireless technology. Every company that develops and produces bluetooth LE 5.0 module enabled devices itself obliges to participate in the organization.
The fact that the companies involved, Ericsson and Nokia both come from Scandinavia. Similarly, it should have been a decisive factor in the choice of name. The word “Bluetooth comes to be reminiscent of Harald Blauzahn , the Danish Viking king.
This managed to unite the warring parts of Norway and Denmark into one kingdom in the 10th century. Incidentally, the iconic Bluetooth symbol is a combination of the Old Norse runes ᚼ and ᛒ , which stand for Harald Blauzahn's initials (HB).
Bluetooth LE 5.0 module h is the result of cooperation between numerous parties. The basic radio procedure is essentially due to the work of the Dutch professor Jaap haarsen and the Swede Sven Mattisson, who both worked for the mobile phone and internet company Ericsson.
Bluetooth owes other aspects to a large extent to the technology groups Intel and Nokia. Furthermore, we explain the technical background to you.
The bluetooth chip
The prerequisite for a digital device to consider bluetooth LE 5.0 module is corresponding software to control the data transfer as well as a special Bluetooth chip. Similarly, it has a transmitter and a receiver unit and is built into the hardware.
Well-known manufacturers of such chips include Atheros, Nordic Semiconductor and Toshiba. You can also connect a Bluetooth adapter to the USB interface of a device and thus add this function to it.
The dedicated Bluetooth frequency is in a license-free ISM band between 2.402 GHz and 2.480 GHz. Compatible devices that meet the standards of the Bluetooth SIG are allowed to transmit as so-called Short Range Devices (SRD) worldwide without authorization in this frequency range.
In order to be able to clearly identify itself, each bluetooth LE 5.0 module has an individual, 48-bit long MAC address.
ISM bands are frequency bands that can be common by high-frequency devices in industry, science, medicine and in domestic environments without a license and without a permit. A frequency band or range denotes a sub-range of the electromagnetic spectrum that is common for technical communication.
A connection can originate from any device, which thereby rises to a “master” opposite the “slaves”, i.e. the devices involved). This remains in place until the master deactivates the Bluetooth function in its system again.
Devices that want to dial "listen" in scan mode every 2.56 seconds for a signal from the master. The connection establishes within 1.28 seconds on average. The connection of two or more devices via bluetooth LE 5.0 module is “pairing”.
In practice, the participants must be in close proximity to one another and have activated the Bluetooth function on their respective device. Depending on the device, activation takes place via special software. It is a control panel or a button on which the Bluetooth symbol is easy to see.
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