What is Bluetooth: Definition and 67 Discussions

Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances using UHF radio waves in the ISM bands, from 2.402 GHz to 2.48 GHz, and building personal area networks (PANs). It was originally conceived as a wireless alternative to RS-232 data cables. It is mainly used as an alternative to wire connections, to exchange files between nearby portable devices and connect cell phones and music players with wireless headphones. In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 meters (30 feet).
Bluetooth is managed by the Bluetooth Special Interest Group (SIG), which has more than 35,000 member companies in the areas of telecommunication, computing, networking, and consumer electronics. The IEEE standardized Bluetooth as IEEE 802.15.1, but no longer maintains the standard. The Bluetooth SIG oversees development of the specification, manages the qualification program, and protects the trademarks. A manufacturer must meet Bluetooth SIG standards to market it as a Bluetooth device. A network of patents apply to the technology, which are licensed to individual qualifying devices. As of 2009, Bluetooth integrated circuit chips ship approximately 920 million units annually.

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  1. DaveC426913

    Why does Bluetooth suck so bad?

    (Serious question here. I really do want to understand if - and possibly how - it's supposed to operate painlessly.)In the 20th century it was printers. In the 21st century it's Bluetooth devices. Every experience with Bluetooth is fraught with repeated failure that just pours gasoline onto a...
  2. S

    Bluetooth speaker connects to Raspberry Pi 4 but plays no sound

    I am able to pair my Bluetooth speaker to my Raspberry Pi 4. I am able to select it as the current audio output by right clicking on the "speaker" icon, top left of desktop. Under "device profiles" the speaker's profile is shown as "High Fidelity Audio (A2DP Sink)". But when I play any media...
  3. NTL2009

    Components of Bluetooth audio delay/latency?

    I often watch instructional YouTube videos on my tablet with Bluetooth headphones. The delay/latency in the audio often isn't so noticeable, but when I see someone using a hammer, or sandpaper, the delay between the visual of the hammer hit or sandpaper swipe and the audible "bam" or "swoosh" is...
  4. Wrichik Basu

    Bluetooth malfunctioning in Ubuntu 20.04 laptop

    My laptop is running Ubuntu 20.04, always up-to-date. This problem has started very recently. Suppose I connect my Bluetooth earphone to the PC, and start watching some lectures on YouTube. (Internet is provided by USB tethering from Android phone.) Suddenly, the audio on the earphone stops. On...
  5. BiGyElLoWhAt

    Building a Low Power DiY marine bluetooth speaker set

    My dad has been asking about some speakers for his boat, something that will move a bit of air, not too big though. I'm thinking 1x12. He also wants it bluetooth and powered externally, so it doesn't drain the boat battery. So I'm thinking 1x12 speaker in a small box that can fit inside the...
  6. S

    Raspberry Pi bluetooth audio problem after upgrade

    Raspberry Pi 3 with Raspberry OS... Recently did apt-get update and upgrade. It did an upgrade of the desktop after asking for permission to replace the file piwiz.desktop. It then ran a wizard to redo various options and preferences, including WiFi and password (which I had set up initially on...
  7. TechTree

    Electronics Can I Convert My Guitar Amplifier into a Bluetooth Device?

    Hello, I have a guitar amplifier I'd like to convert into a bluetooth device. Using it's current power supply and allow it to receive a bluetooth input. I have a bluetooth speaker that I took the electrics from. The bluetooth speaker is digital, but when it outputs to the speaker it's an...
  8. S

    Fixing a Bluetooth Controller on a Motorcycle: Please Educate Me

    A friend from work bought this product for his motorcycle. It's a couple of speakers with a Bluetooth controller. The controller will adjust volume and allow the user to toggle through tracks playing on their phone. The cord was too short. So he asked if I could make it longer. Sure thing...
  9. ISamson

    Electrical Homemade, easy, DIY, wireless, IoT and Bluetooth?

    Hello. From my reasoning, I understand that at the most basic levels all electronics are made out of transistors, wires, capacitors... So I was wondering if it would be possible to make an easy, homemade DIY wireless, IoT or bluetooth connected piece of electronic just by using wires...
  10. R

    Can 2 slave devices be connected to one bluetooth device?

    2 slave devices to one system?? (3 TOTAL devices)
  11. Ez4u2cit

    Can Bluetooth improve GPS accuracy on mobile devices?

    Can someone explain why the GPS on my phone is improved when Bluetooth is on?
  12. rushi121

    How can I detect whether driver is sitting in car or not?

    I want a device that can either stick on dashboard or like a key fob in driver pocket that will help to detect whether person is in car or not. Requirements: - Device must have a detector and siren. When detector detects that person is not in car should buzz siren. - Can be a device in car or...
  13. Q_Goest

    My new computer has bluetooth issues :(

    I have a new Dell laptop: https://www.amazon.com/gp/product/B015SHDRRW/?tag=pfamazon01-20 It came with Windows 8.1 and I put Windows 10 on. Problem I'm having is with the Bluetooth. The Bluetooth doesn't seem to be able to locate things such as my headphones or wireless speaker. I've looked...
  14. wolram

    Bluetooth Earphones: Music Therapy for Schizophrenia

    This must be one of the greatest inventions ever, i can listen to my music wherever or whatever i am doing i can listen to them when i have a schizophrenic attack and it helps enormously, i am so pleased i bought them, it took a while to configure them to my laptop but it was well worth the...
  15. Nietzsche_Keen

    Possible to turn Android phone into Wii style remote?

    I can find instructions and videos everyone for how to control a remote control car with buttons on a smartphone screen. However, what I'M hoping to do is control an arduino equipped motorized car using the gyroscope and accelerometer contained within the phone. I have found the Wireless IMU...
  16. B

    How Does Bluetooth 4.0 Work in the Context of Retail Beacons?

    Hi everyone, I would like to know how the BLE functions in more detailed manner. Consider the case of BLE beacons at the local retail outlet. I am notified of a offer when passing through the outlet. The offer may be a text based or a image based. I presume the merchant sends me a generic...
  17. marellasunny

    OSI 7 Layers,where does the protocol fit-in?

    I am a novice reading about the 7 OSI layers. I am reading this because I am currently working with a bluetooth device which is used to send serial data from the bluetooth module to the laptop. Since bluetooth is in itself a protocol,much like the 802 protocols, where among the 7 OSI layers does...
  18. marellasunny

    Why do I need a processing code when I pair Arduino with bluetooth

    Why do I need a "processing" code when I pair Arduino with bluetooth I have a need to connect my [Arduino+Bluetooth dongle JY-MCU V1.02] to my laptop in-built bluetooth device.Most forums suggest using a processing code to go ahead and do this...
  19. marellasunny

    Criteria for choosing short-range wireless:RF/bluetooth/zigbee

    I am a mechanical engineer with little/no knowledge of wireless communication protocols.I have the need to transfer serial data from my Arduino(microcontroller) to my PC. Steering wheel sends serial data upon request from Arduino-> Arduino receives this serial data -> (wireless protocol...
  20. A

    What shapes inside a wireless wooden speaker can amplify sound?

    So, I need to make a wireless wooden speaker (no Bluetooth or anything, you just put the phone in and it makes it somewhat louder) for my phone (white iPhone 4 without a case if you wanted to get an idea of the dimensions and aesthetics). My design sketch as of now is a cube measuring roughly...
  21. Astronuc

    Cycling Thread - New Bikes, Copenhagen Wheel & Superpedestrian

    We have various topical threads, e.g. The Food Thread, Best Songs Ever, How does your Garden grow?, etc, so I thought a cycling thread would be in order. This past summer, our family invested in some new bicycles for family cycling outings. We've frequented a local railtrail. I have a...
  22. P

    Secret Bookcase Door Switch - Help?

    Hey folks - Question. I'm working on a secret door disguised as a bookcase and I'm looking for some help from a curious and knowledgeable electrical engineer about a clever way to make the lock open. The desired effect is for the opener to touch two brass busts on the bookshelf...
  23. M

    Programming TI Products: Beginner's Guide to Programming CC2540/CC2541 Chips

    Hello guys, I am a little intrigued with TI's (Texas Instrument) line of products, especially the Bluetooth Low Energy chips that they have. I am working on a project (personal, not school) and all I need to do is program a TI CC2540 or CC2541 to control a basic DC motor (eventually, from an...
  24. M

    Phone Upgrade Advice: ZTE Majesty vs. Samsung Galaxy Proclaim

    I want to upgrade my phone, but I'm not sure if it's worth the money. My main question is, does the processor speed make that much of a difference between my current phone (Samsung Galaxy Proclaim- 1GHz) and the new one (ZTE Majesty- 1.2 GHz)? Is it worth the switch? Both phones are from...
  25. G

    Best programming language for an EE?

    After some research it seems that C would be the best choice. But I also hear that it is better to learn C++ first, then transition to C. I am at the beginning of my college career so am not sure where I want to end up in EE, although I have started a list of projects that I can do in the...
  26. P

    Bluetooth transmission and FHSS

    Hi, In very simple terms am I correct in thinking that bluetooth uses FHSS during signal transmission which involves changing of the carrier frequency at set intervals, essentially allowing the signal to change channels within the 2.4GHz band? Thanks
  27. E

    How can i receive Bluetooth signal in tiny robot ?

    hi i want to to create a small robot controlled by Bluetooth of cell phone but i wondered about how the robot can receive this signal ? what is the technique i should use in my tiny robot so i can control it ?
  28. J

    Help with power supply design for portable device

    I need help designing a power supply for a portable medical research device for animals. My problem is designing a configuration for multiple voltages with pcb size and power efficiency in mind. I need 3.3 V, +/- 1.5 V, and +/- 20 V. Below I’ve listed device info and estimated current...
  29. R

    Combine bluetooth transmitter in a school project

    hey im in 11th grade and I am in a electorinc trend at school, we have to make a project for school and i want to combine bluetooth technology in it. i looked i looked Through the internet for guilding- how it is built, are there any protocols, how to use / transmit/recive - everything. so far i...
  30. S

    Discover the Future of Wearable Technology: Bluetooth Clothing Chip Design Tips

    I design consumer products and have just received a commission to build a piece of clothing that transmits sensor data to a smartphone. I'm looking for the best places to begin my research. Is there someone here that could help me? Any and all advice is greatly appreciated. Thanks...
  31. B

    How Many Bluetooth devices can be paired to iPhone 4S simultaneously?

    iPhone 4S comes with the latest Bluetooth Low Energy Module. By BLE Spec, the BLE module can be paired to more than multiple slaves/nodes simultaneously. I would like to know if 4S can be paired with multiple BLE enabled devices simultaneously? I am not sure if I have posted my query under...
  32. C

    At what radius can you send peer-to-peer text messages / SMS over ham radio ?

    at what radius can you send peer-to-peer text messages / SMS over "ham radio"? suppose we have lots of people concentrated in a small area, like a college campus. Maybe a mile or so in diameter. We would like to set up a packet switched peer-to-peer SMS transmission using low cost long wave...
  33. M

    Need to Build Two Circuits That Sense Proximity To Eachother

    Need to Build Two Circuits That "Sense" Proximity To Eachother Hi all, I am trying to build two circuits as part of an experiment that can "sense" proximity to one another. So basically, as they the two circuits get physically closer to each other (starting at a range of maybe 10-20ft), an...
  34. A

    What is the most efficient and versatile wireless standard for various purposes?

    Is there any necessity at all to come up with one united standard? This is what I'm thinking: come up with a single standard, but with 3 mode: Wireless Cable mode: up to 1.5 meter, minimize the power consumption and radiation while providing excellent speed. PAN mode: with a maximum range...
  35. B

    Bluetooth Technology in Remote

    My knowledge in electronics is limited. In general, the television remote use IR for sending signals. I would like to know if the same signals can be transmitted using bluetooth. If so are there any disadvantages in using bluetooth technology in television remote? Regards
  36. E

    Exploring Wireless Technology for Go-Kart Innovation

    I posted this in the other section but didn't seem to get any replies and thought this would be a better forum for this type of question. Looking to brainstorm a little. Looking for some EE's or anything related to share thoughts. Trying to come up with some ideas to incorporate into a...
  37. A

    Bluetooth components selection? Any already made devices?

    Bluetooth components selection? Any "already made" devices? Hi all, this is what I want to get done: a device1 reads data from sensor using a parallel port, then send it to a device2. Here is what I can think of about device1, it should be a very small 8bit smp MCU controlling a com device...
  38. D

    Which is the Best Choice for a Wireless Fencing Unit: Bluetooth or USB?

    Hey everyone. I'm new on physics forums, and I have a project that I would appreciate some help... This project is to make a wireless fencing unit (olympic fencing, not like farming...) that can connect via usb or bluetooth into a smartphone to simplify the tools for local referees. So, I...
  39. E

    Need a good in-class note taking application

    Homework Statement I need to take notes in Physics class. I have an iPad and was wondering what apps would be good for the equations/drawing/note taking. I have a bluetooth keyboard to go with it, and am familiar with LaTex. 2. The attempt at a solution I have used Tex Touch but...
  40. B

    Hobby project - Bluetooth device

    Hello, I'm not sure if this is the right forum for my question. If it's not, I am kindly requesting some assistance as to which website/forum to go to. Here's my question: I'm a sophomore and I'm trying to do a side engineering project to put on my resume and maybe eventually turn it...
  41. T

    What's necessary for cordless keyboard & mouse?

    What do they communicate by? As in, do I need a bluetooth adaptor or will a b/g/n wireless adapter do? Also, do these things need proprietary drivers or will they work out of the box with Linux(Kubuntu)? The keyboard: https://www.amazon.com/dp/B003VAGXZC/?tag=pfamazon01-20 Thanks for your time.
  42. C

    Create a Wireless AV Switch for Simple RCA Audio Input Toggling

    I'm trying to figure out the easiest way to make a simple switch that toggles between two different RCA audio inputs. I can do it easily with a physical switch but how can I do it remotely. Either from a remote or from my cell phone (so either IR, Bluetooth, or WiFi). I'd prefer using my...
  43. B

    Programmable Bluetooth Transmitter for Extended Range - No Cellphone Required!

    ---bluetooth transmitter------ hello every one I'm new on this site and this is the only forum i discovered so far that deals with electronics i need some help i'm trying to build a programmable bluetooth transmitter all i want from that transmitter is this i need to make a box (not a...
  44. M

    Getting data from Wii remote signal

    Hello , I'm working on a project where I'm using a wii remote to track an infra red LED. The wii remote is connected to the computer via bluetooth. I've no experience with dealing with the wii before. My questions are: 1- How can I read the data send by the wii remote to the computer ...
  45. J

    How Should I Begin Programming My PIC16F628A Bluetooth Remote Control Car?

    I am designing a bluetooth remote control car using the pic16f628A. any suggestion of how I should start designing my program?
  46. J

    Can a Bluetooth Module's Range be Configured and What are the Options?

    Hi guys. I am new here. Is there a bluetooth module which you can configure the range of the the module? For example from a 5 meter range to about 1 ft or less... Currently planning on using BTSerial1 Bluetooth module. Any idea of a less expensive and better bluetooth module? Im new to this...
  47. G

    Is RFID the Best Choice for Long-Range Device Communication?

    RFID or better alternative?? I want to be able to transmit and receive a signal from one device to another; the devices need to be very small and very inexpensive.. I'm hoping for it to work over quite a long distance; definitely more than just 10m.. also if a battery or energy source is...
  48. L

    Control phone with pc (bluetooth) and no applications

    Hello, I have a question about controlling your telephone with your computer. Because we want to make a picture with the phone and this picture must appear (and be saved) on a computer. I know this is possible because we allready did this with a nokia telephone and the program Remote...
  49. W

    ( easy ) Powering LEDs off of triple A batteries

    Okay, this is obscenely easy and that's why I'm confused on it. http://teachwithtech.com/Full-Product-Listing/Vishay-TSAL6400-10-Pack-p21.html What I'm trying to do is power two of those LEDs off of a single triple A battery, if at all possible. I don't know what the specifications mean. I...
  50. B

    Cellphone power adapters consolidation

    Hello all, 1. Scenario Description My household has two mobile phones, a bluetooth earphone and a blackberry. As each device has its own charger and its a power adapter & cable nightmare. A recent Duracell myGrid advertisement had me prompted to do something about it. 2. What do I want...