🎧 What Is Bluetooth? A Plain-English Guide to How It Works

Frank Bravo 0:00
You slide into your driver's seat, you buckle your seat belt, you back out of the driveway. Your phone is sitting in the cup holder and your favorite playlist is queued up, and you wait for the music to come on through your car speakers, just like it did yesterday. Except today, nothing happens. No sound, no name on the dashboard. Just silence and a vague memory of that music that played so well yesterday. Or maybe it's not the car. Maybe it's a pair of wireless earbuds or a speaker that's connected fine last week, but now it refuses to. Or maybe even it's your fitness tracker someone has set up for you, and you have no idea how they talk to each other. That's Bluetooth. It's everywhere in your life. Most people use it every day without realizing it, really knowing what it is and what it can and can't do, and really how to fix it when it gets weird. So today we're going to demystify all that calmly without jargon, just so that the next time something refuses to connect, you'll have a better idea of why. Welcome to your Tech Makeover, the podcast that gives you tips and tricks to help you simplify and get more out of the technology in your life. I'm your host, Frank Bravo. Like I mentioned, today's topic is Bluetooth. What it actually is, where you find it and why, what it's good at and what it's not good at. And then some basic steps for connecting new devices. We'll also touch on the most common reasons it stops working, so that you have a short mental list to run through every time it doesn't work before you start blaming that gadget. So what actually is Bluetooth? Bluetooth is a way for two devices to talk to each other wirelessly over a short distance. It uses radio waves, the same kind you generally have with Wi-Fi, but tuned for really short range and low power. Short range is the important part of all this. Here's the picture I want you to keep in your head. Wi-Fi is built for moving lots of data between your devices and the internet across your entire home or wherever you're working. Bluetooth is built for two devices that are close together, sharing a small amount of information without needing the internet at all. Your phone and your headphones. For instance. Your car in your phone. Maybe it's your laptop and your wireless mouse. None of that goes out over the internet. It's all a private little conversation between these two devices in the same room. A fun little bit of trivia. Bluetooth is named after a thousand year old Danish king who had the dam of Bluetooth, who united warring tribes. The engineers liked the idea of one standard that united competing devices, so they borrowed the name. So that's why the Bluetooth logo looks a little bit like a ruin. You didn't need to know that, but now you do. So where do you find Bluetooth and why is it there? Once you start looking for Bluetooth, it is everywhere on the devices you own that don't have a cord. The most familiar example of this is audio. Like I mentioned, wireless headphones, earbuds, speakers. They all use Bluetooth to get the music from the phone or your call to your ears. Your car uses it in the same way when you pair a phone with your car. You use Bluetooth so that the car can play music, route your phone through calls, through those speakers, and read your text messages out loud if you let it. It also is the way a lot of accessories talk to your computer. Maybe you have a wireless keyboard or mouse, a trackpad, game controllers, smart pens. None of those have to be plugged in anymore. And that's all because of Bluetooth. Then there are health and home sides of things to your fitness tracker, your smartwatch, blood pressure cuffs, even some scales and glucose monitors often send their numbers to your phone or your device over Bluetooth. Many smart home gadgets like smart locks and smart light bulbs also have started using Bluetooth connections during the setup before they jump onto your Wi-Fi for everyday stuff. And finally, they're sharing. Apple AirDrop is a great example of how Bluetooth is used to find nearby devices and start that conversation, and then it hands it off to Wi-Fi so that the actual files transfer. Sharing through Wi-Fi passwords through one phone to another is works the same way. So even when you don't see the word Bluetooth anywhere on your screen, it's often the matchmaker behind the scenes. The reason Bluetooth is everywhere is very simple. It's cheap to add to a device, it uses very little power, and it doesn't require any setup with your internet or your network. Two devices a short distance apart and a quick handshake and they're talking to each other. A quick shout out to listeners like you who helped make your tech makeover possible. Your support helps keep this podcast going and I truly appreciate it. Want to contribute? Just click the link in the show notes or visit your Tech makeover. Plus, as a thank you, supporters who give $25 or more will get $25 off a one time consultation with me to help you simplify your tech. Thanks for being part of the Your Tech Makeover community. Now back to what I was saying. So what is Bluetooth not good at? And so where are the limitations? This is the part that nobody tells you, but it explains a lot of frustrations. The first limitation is range. Remember I said that it had to be relatively close together. Most Bluetooth devices today work well within a 30ft range, and then when there's nothing between the devices, if your phone is in your back pocket and your headphones on your ears, your body is literally in between them. It usually works just fine today. But back in the past, that wasn't always the case. But if you've ever taken three steps too far from your phone, your speaker will start to skip. That's the range giving up on you. The second is the interface. Bluetooth shares part of the airways with Wi-Fi and other wireless gadgets. A crowded coffee shop or a busy airport or a packed stadium can sometimes be a soup of competing singles. The connection mostly survives, but when you notice more glitches, there's what's probably going on. There's probably too many devices in the area. The third limitation is the number of devices. A typical pair of headphones can really only be actively connected to one or maybe two devices at the same time. Newer headphones sometimes do something called multi-port, which lets them switch quickly between them say your phone and your laptop. But in general, Bluetooth is not built for a crowd. If you have a pair of earbuds and you want your spouse to have a listen to it, you're going to have to switch them to her phone or his phone. Or if you have an old tablet on the shelf, you're probably running into that limit as well. The one last thing is audio quality and leg Bluetooth audio usually is fine for music. This podcast I listen to my podcasts on my earbuds or calls. It's not always perfect for serious music production or even light video syncing. If you've ever watched a video and felt like the lips were slightly off. Bluetooth lag is sometimes the reason none of this means Bluetooth is bad. Of course, it just means that the short range and light duty wireless has its limitations, and once you know what it's for, it stops feeling unreliable because you stop expecting it to be something like Wi-Fi. So where can you actually use Bluetooth and how do you actually pair devices? Most of us know this, but it's good to kind of refer to how to do it. So when you connect two Bluetooth devices together for the first time, it's called pairing. Not like the fruit, but like pairing two things together. After the first pairing, the devices usually remember each other and reconnect on their own, sometimes even a little bit too much. Which is why you don't have to do this every morning. The pattern is sometimes the same on every device, but sometimes they're a little bit different. Usually you can put one device next to the other, put one in pairing mode, and it'll go out and look for the other one. On the phone size, it means opening your Bluetooth settings and making sure Bluetooth is on. On an iPhone, you'd go to your settings, then Bluetooth on Android. Again, it's in settings and look for connected devices. Or maybe it's just Bluetooth. Depending on the manufacturer, it's a little different all the time. The other device the headphones, the speakers, the keyboard, the fitness tracker, whatever it might be, you put into pairing mode. This usually means holding down a particular button until the light blinks off in blue, sometimes a mix of blue and red, depending on the gadget. Every gadgets a little bit different though, and usually there's a card or a sticker in the box that tells you exactly how to do this. Once the pairing mode has been started, you can usually find that device name on the phone or the device you're pairing to. You can also usually look under other devices or available devices to find it. Sometimes it asks for a confirmation code to make sure that you are the person who's pairing it. After that, any time you have both devices turned on and they're in range, they should connect automatically. Your car remembers your phone, your earbuds. Remember your laptops. You usually don't need to repeat that dance, but if your device does not connect the next day, the fastest reset is to turn Bluetooth off and on again. Remember me talking about restarting your computer or restarting your device? It's the same with Bluetooth. It doesn't forget the network, it just refreshes it. And if it still doesn't connect, sometimes restarting the devices is the best way to do it. That's it for Bluetooth. It's not magic. It's short range wireless built for two devices to talk to each other with real limits that you can plan around once you know them. The next time your earbuds skip or your car stays quiet, or maybe your your speaker forgets that you exist, you'll have a much better idea of where to start. If there's one Bluetooth gadget in your house that gives you more trouble than anything else, I'd love to know what it was. There are usually 1 or 2 tricks of each kind to make it good for a follow up episode, so let me know because I'd love to be able to do that. But also, you can let me know about ideas that you might have for topics you'd like me to cover in general. Please feel free to contact me via email at Frank at your Tech Makeover. That's it for now. Thanks for listening to your tech makeover, if you haven't already. Don't forget to subscribe to this podcast and so that you don't miss an episode. And if you don't mind leaving me a review or five stars, I'd appreciate that too. It takes two seconds to do and it helps me help others. If you are on Substack, make sure you subscribe to the newsletter so that you're alerted to new content as it gets posted. And you can always check out your tech makeover, where you can find more information about each episode. And if you want to find out more about me, please visit Bravo! Until next time, I'm Frank Bravo, and this has been your tech makeover.