WEBVTT 00:00:03.400 --> 00:00:10.040 Bluetooth is actually nothing to do with teeth It's a wireless Technology 00:00:07.839 --> 00:00:15.400 standard for exchanging data over short distances using short wavelength UHF 00:00:13.040 --> 00:00:22.240 radio Waves bluetooth transmits in the ism That's for Industrial Scientific 00:00:17.840 --> 00:00:25.279 Medical Devices band from 2402 to 283.5 00:00:22.240 --> 00:00:27.640 MHz also known as the 2.4 GHz short 00:00:25.279 --> 00:00:31.960 range radio frequency band including ITS guard bands and as Such It's also 00:00:32.200 --> 00:00:39.960 so The Story Behind The Name then The Original standard was developed by the 00:00:36.399 --> 00:00:43.000 Telecom vendor ericson in 1994 as a 00:00:39.960 --> 00:00:44.960 wireless alternative to rs232 data 00:00:43.000 --> 00:00:50.920 cables It didn't receive The Name Bluetooth until 1997 When Jim kardak Who 00:00:48.920 --> 00:00:53.280 developed a Communication System between mobile phones and computers proposed it while reading the long ships by France 00:01:18.600 --> 00:01:26.320 between two to eight devices where there is one Master device 00:01:23.280 --> 00:01:28.560 and up to seven slave Devices Vikings am 00:01:26.320 --> 00:01:34.000 I Right and while It was only intended to replace serial Cable it can do so 00:01:31.240 --> 00:01:38.520 much more You can wirelessly control and communicate between a mobile phone or 00:01:36.320 --> 00:01:43.439 tablet and handsfree headset car audio System speaker System and Intercom You 00:01:41.040 --> 00:01:47.520 can network with a pc so like transfer files You can control printers and 00:01:45.159 --> 00:01:52.119 computer peripherals barcode scanners and Traffic control Devices and even 00:01:49.799 --> 00:01:56.200 replace infrared scanning in some cases and that list is not exhaustive by any 00:01:53.960 --> 00:02:01.000 means so Ok it does lots of stuff but How does it it work Well there are two main 00:01:58.159 --> 00:02:04.079 components at the physical level Well Works Pretty much the same Way as any 00:02:02.479 --> 00:02:08.200 other radio frequency standard with antennas that can broadcast and receive 00:02:05.920 --> 00:02:13.080 signals in the appropriate bands but at the protocol level Things Get a little 00:02:10.080 --> 00:02:15.560 bit different to achieve a robust enough 00:02:13.080 --> 00:02:19.840 connection for Communication use even in environments with very Heavy 00:02:17.360 --> 00:02:25.280 interference Bluetooth communicates with very short transmission bursts and then 00:02:22.280 --> 00:02:28.080 quickly does microps Around to the 00:02:25.280 --> 00:02:32.239 various frequencies Within ITS range and it allows More than One device to 00:02:30.080 --> 00:02:38.879 transmit on the same frequency at the same time but Constant transmission of 00:02:36.120 --> 00:02:43.200 data means higher power consumption and for Years most Bluetooth Devices 00:02:41.120 --> 00:02:48.599 suffered from Lame dock Battery Life that pained users and Made the standard 00:02:46.280 --> 00:02:54.519 not practical for many Applications until a few Years ago Bluetooth 4.0 or 00:02:52.000 --> 00:02:59.000 Bluetooth Smart Came on the Scene it's basically the power efficient version of 00:02:56.720 --> 00:03:04.120 Bluetooth that has enabled Amazing stuff like Devices with with One To two Years 00:03:01.560 --> 00:03:06.760 Of Battery Life On A single button cell I mean I wish My Phone could do that 00:03:05.280 --> 00:03:10.879 It's to Bad Has to Power other stuff like the screen the one Issue with 00:03:08.799 --> 00:03:15.440 Bluetooth Smart accessories is that They Can Only be Used with Bluetooth Smart 00:03:13.400 --> 00:03:20.319 Ready Primary Devices smartphones notebooks tablets a qualification Given 00:03:18.319 --> 00:03:24.280 to phones that are by definition compatible with Bluetooth Smart 00:03:22.000 --> 00:03:28.360 accessories meaning that There is no backwards compatibility between phones 00:03:26.480 --> 00:03:31.760 with older versions of Bluetooth like 2.0 or 3. 00:03:30.239 --> 00:03:36.239 and Devices that are equipped with Bluetooth Smart Bluetooth Smart Ready 00:03:34.200 --> 00:03:41.080 Primary Devices however are backwards compatible with accessories that Run 00:03:38.439 --> 00:03:45.239 older versions of Bluetooth One other Cool Bluetooth 4.0 fact is that range 00:03:43.640 --> 00:03:50.480 Just no longer Locked down so while manufacturers can OPT to optim for more 00:03:47.879 --> 00:03:57.079 traditional 10 Meter or 30 m ranges It's possible for Devices to work at 60 m or 00:03:54.120 --> 00:04:01.959 Beyond so That's it Bluetooth is a Low Speed ​​interference resistant commun 00:04:00.079 --> 00:04:07.360 protocol that allows Devices to transfer data across multiple platforms at short 00:04:05.040 --> 00:04:12.840 range and now with Great efficiency speaking of efficiency what If There Was 00:04:09.959 --> 00:04:18.000 some 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