How does Bluetooth work? - easily explained
Thanks to Bluetooth, you can use the hands-free system in the car and transfer data - but how does the transmission technology work? We explain in a simple explanation how the connection to printers, smartphones, loudspeakers and Co. works.
Bluetooth transmission: how it works!
Bluetooth was developed in the 1990s to enable data transmission between different devices at short distances. The technology was developed for Ericsson at the time, and a little later Nokia and Intel added certain parts to make a cable connection between two devices unnecessary.
- The so-called ISM band, which is used with a bandwidth of 2.402 GHz and 2.480 GHz, is used to transmit the information. This bandwidth is in turn divided into 79 individual stages, which are separated by 1 MHz.
- There are up to 1, 600 changes per second between these stages. This process is called frequency hopping. Although the WIFI / WLAN technology uses the same procedure, interference, i.e. interference with the two transmission technologies, is avoided by the large number of jumps.
- Each device has both a transmitter and a receiver via which a mutual transmission between two devices is possible. In addition, each device that also has Bluetooth has a 48-digit number that makes the device unique in the network.
Fun fact: that's where the name Bluetooth comes from
The name of the transmission technology comes from a nice story: Accordingly, the Danish king Harald Blåtand, in German Blauzahn and in English Bluetooth, managed to unite the two countries Norway and Denmark. Until then, these were hostile. This association was used as the name for the technology used to connect two devices.
- The logo is also related to this king: For example, the letters H and B were moved together as old Norse runes and the Bluetooth logo developed from them.
