SparkFun According to Pete #49 - How Bluetooth Works

In this episode of According to Pete, we go a bit more in-depth into how Bluetooth (specifically Bluetooth Classic) actually works from a low-level perspective. We’ll briefly cover some history, the specs and they’re data rates, modulation schemes, data formats and frequencies in use. It’s a crash course in what the Bluetooth landscape looks like.

[@sebastiantu6212]

This guy's personality actually helps me understand the content a lot better. I zone out within seconds of most videos. I can't believe a actually finished a 40 minute video about bluetooth

[@Kleedje3000]

i do related on this. Also I find it a bit "American" ((saying from a dutch with a stick up his *ss)not sure if he is :P ) but in this case it just keeps me focused on what he is saying. So in the end.

[@amrrmar]

Great video, thanks ! TDM = Time Division (not domain) Multiplexing SPP = Serial Port Profile (not Protocol) :)

[@betsybrahm2214]

I'm new to Bluetooth, and this video provided insight into how it works. Once I found the video, I was glued to it, til the end. Thank you for taking the time to make it.. Betsy Brahm

[@MikeBramm]

Thanks Pete. Very informative. Keep them coming.

[@bernardkravitz]

Great high level intro of a messy landscape! Thanks.

[@aleksaanicic3766]

Awesome work, thanks Pete!

[@radinm7258]

Loved this! Thank you for the high level instruction. At least now I have some ideas about what's under the hood for Bluetooth!

[@himanshumishra4567]

Thank you for providing in-depth knowledege of bluetooth classical

[@mavez6322]

Excellent video fella! Very informative.

[@amiryosha6653]

Hi, do you have a link for the next episode - "low low energy & smart BT" ?

[@rusticagenerica]

Damnit too many joke attempts per minute for me. :-) :D

[@jklmnpqrst]

skip to 3:19, thanks me later

[@PellJuran]

Really great video - wish I'd found this a few weeks ago. Can you recommend a similar video covering the software aspects of connecting - pairing and services etc. I want to use a phone to send small amounts of data to a Bluetooth device without the device having to agree to the pairing. The user won't have any way to say yes on the device itself or key in 4 digit codes etc. Can this be done? Is there some sort of "Discoverable and will accept data from anyone" mode?

[@UseLogicPlease123]

Thanks! Would love to see more in-depth on BLE.

[@sagnikpradhan3594]

I missed you a lot Pete ! 😭

[@pangolian]

I've never had so much fun learning about bluetooth

[@patrickdiego4115]

Great Video. Hoping to see Bluetooth Low Energy video as well.

[@ashishgarg2471]

Nice content for beginners

[@eigenfield]

The packet layout you described is already when they are connected. Can you describe the packet during scanning and discovery phase?

[@eigenfield]

Can u explain the ARQN and SEQN bit in a noisy and there is a re-transmit. How does the sender, receiver know about these conditions and decide on re-transmission and move on?!

[@upendercharychennoju2749]

Hello Pete, As you mentioned you will be explaining about the BLE in the next lecture. But there is no post regarding the BLE. Your videos are very helpful. Please make a video on BLE. Thank you so much.

[@scottthornton4363]

Does anyone know where I can find more info on BT Classic, particularly SCO for audio. Looking for anything; modules, coding, general, etc.

[@gopimarvathi3733]

Could you share the resources you find here? It'd be helpful

[@achyuthegde09]

Good work Pete! This is the best starting point for the people with no knowledge of BT.

[@dani6343]

34:40 The HCI takes AT commands directly?

[@BenBizaouiESR]

so would a single master be able to slave multiple devices (make my phone play music to multiple speakers )

[@vinayvincent3462]

Good background info on bluetooth. However for the next video, you could probably do without the background music which is rather distracting :)

[@eigenfield]

Header is 54 bits. So the 18 bits is replicated three times. Can u explain why this triple replication for the header?

[@eigenfield]

Does HS have FHSS?

[@WA4OSH]

4:30 Yes, the organizaiton is called Bluetooth SIG (It's pronounced sig, one word)

[@AstroSam66]

Actually its Lenov'O' :-)

[@electron-1979]

I don't mind the on-the-fly style

[@celestinarocha3034]

hello, a shared my bluetooth with an unknown guy who said he needed internet for an emergência. Now I'm afraid he hacked me. What shall I do to clean my mobile, please?

[@UseLogicPlease123]

8 bytes of sync but 1 bit of sequence? whaaaa?

[@jackmanjls]

A suggestion...some timing diagrams would be make this presentation cleared.

[@tedder42]

lenova=lenovo (I think). and you did quote universities. At least there's a trailing quote :)

[@snakeoilification]

Ugh. I always make that mistake. But I only quoted universities after the fact.

[@efratisack2396]

the man in the back is priceless

[@rusticagenerica]

At some point you talk about HS and say it is WIFI. But Bluetooth is not WIFI is it ?? Different antaenas etc ... Or is Bluetooth HS Exactly WIFI ? Then why do they have such different names? Would Bluetooth be actually a Slow WIFI ?

[@boliveirapublico]

you must be crazy to try to understand how this works :-)

[@snakeoilification]

That's kinda how I feel about it!

[@electron-1979]

Hmm. Why did you watch it?

[@eigenfield]

I develop BPP for a printer and had to hand carry our prototype printer to Milpitas for certification. We had a Nucleus RTOS and proprietary BT stack

[@olipito]

Hi Pete! Glad to see you back. I love your vids, but please don't do the side camera thing anymore, leave it to the unboxtherapy guy. Here we do serious stuff!

[@roygalaasen]

olipito yes, right? I never understood the “trend” to voluntarily ruin the immersion by doing those stupid side camera views.

[@Ghost572]

I tried it, the Bluetooth nerds caught me out.

[@TechnologyLearningLive]

good teaching but the rock music became disturbing in understanding yu

[@mewlaue]

the moment you realize, that your car cant speak the same BT Profile, that your smartphone has and need to buy a bt adapter for aux to connect your phone....

[@RickTrajan]

so much data, that's a little hard to grasp...

[@DevCasey]

"MAYBE THEY'RE NOT REAL MAN" XD

[@pirateman1966]

When are they coming out with RedTooth? Bluetooth is so yesteryear? Or at least a GreenTooth that is environmentally responsible?!

[@snakeoilification]

Jeff Branson invented a new color that's a combination of green and orange and he's calling it "grorange". And it's basically brown. But I'm hoping for a GrorangeTooth.

[@eigenfield]

In contrary, we are now at yesterday and Bluetooth's time is still in the future.

[@aldust1578]

4:40 you're not real man

[@leddedup]

Jeebus, this is terrible. First time I ever watched one of these, and also the last.

[@AnuragBhatt123]

This guy is not good, gets distracted from the content

[@jamesm6951]

The nonstop distracting jokes and ADHD-like personality of the presenter make the video unwatchable!

[@rusticagenerica]

Yeah this is plain unacceptable. If you do a video about Bluetooth for a high end channel like SparkFun + include a history section, come on, please take 2 seconds to see the precise data. Doesn't look professional to hesitate. But I am sure the rest of the video kicks Danish Arse