Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [bluetooth]

A low bandwidth, low-power short-range wireless protocol typically used for personal area networks that operates on 2.4GHZ-2.485GHZ.

903 questions
47
votes
5 answers

Is Bluetooth Communication Possible Without Pairing?

I am working on a device which can wirelessly activate a system "instantly". The first thing which came to mind was to use RFID technology which has the advantage of instant and cheap communication. However, I am interested in using my phone's…
capcom
  • 5,902
  • 14
  • 48
  • 59
16
votes
5 answers

Low Cost Bluetooth

What is the lowest cost way to add a Bluetooth integrated radio to an embedded system? I am using a BlueGiga WT12 which works well. IIRC these are in the $20-$25 range. Are there comparable modules that are less expensive? For example, I've also…
jluciani
  • 11,706
  • 1
  • 35
  • 54
7
votes
1 answer

Bluetooth profiles - What is the hardware difference?

Do all bluetooth chips have the same hardware, or does the hardware that is part of the chip defined by the bluetooth profile that we choose to use? Thanks!
dididi
4
votes
1 answer

How do I prevent new pairings on an RN42 bluetooth module?

I'm working with an RN42 bluetooth module and trying to change the settings so that it doesn't accept any new device pairings. According to the command sheet, the command SX,1 should enable bonding which the user guide describe as telling the device…
Brian Hasden
  • 153
  • 6
4
votes
1 answer

Why does an automatic bluetooth connect fails after some time?

I am not sure if this is the right place to ask my question. If not, please let me know a better place to ask it. The question: I have a phone with bluetooth and is connected to a car, so you can use the phone hands-free. And when entering the car…
Alex
  • 151
  • 4
4
votes
2 answers

Bluetooth: chip or module?

I need add Bluetooth to my hardware. I never worked with Bluetooth before, so I was wondering which approach I should use. I some did quick research on internet and found some solutions using a Bluetooth IC like CC2540 and CC2541 from TI. I also…
Daniel
  • 917
  • 1
  • 10
  • 35
4
votes
2 answers

Connecting to HC-05 from iOS based device

Continuing from Standalone Bluetooth my project is almost complete. For any of you who haven't seen that, here's a short info: I'm trying to make an automated list of attendees by using a program that runs on a smartphone that can detect the…
TenzoNakami
  • 117
  • 1
  • 2
  • 9
4
votes
1 answer

HC-0X Bluetooth Module Difference between Slave & Master

whats the difference between a Module HC-05 Master and HC-06 Slave? I have a slave module (HC-06) but im not sure whats the purpose of the word "Master" in the HC-05
Pulse9
  • 499
  • 7
  • 20
4
votes
1 answer

Bluetooth module

I'm trying to use a bluetooth module, but I'm stuck at connecting/configuring it. When powered, the module blinks an led connected to PIO5 once per second, so it is in Discoverable/Inquiring/Idle according to "7.3 LED Status" of the user manual. …
antony.trupe
  • 371
  • 2
  • 9
  • 24
3
votes
1 answer

RN-42 Bluetooth - Can't use data mode with Tera Term

I just got the RN-42, and I am using a simple set-up where I just power the chip, and short-circuit the UART Rx and Tx pins, hoping that whatever I send from my "Tera Term" terminal will be returned back to me. But no.. The thing is that I can enter…
DimC
  • 141
  • 1
  • 7
3
votes
1 answer

Can TI CC2540 chip process simple logic by its own?

In my project, I need bluetooth 4.0 TI CC2540 module works like a beacon to broadcast an ID to space. And it needs to sniff other beacon's signal. In some condition, it needs to trigger an event. Is that possible? Is there any other processor…
Yi Jiang
  • 133
  • 1
  • 6
3
votes
2 answers

Using two bluetooth profiles at the same time to make a wireless keyboard

I'm trying to build a wireless, two part keyboard using bluetooth and arduino. Imagine a normal wireless keyboard but split it in two with the numeric keys on the right placed on a separate unit. Then connect it like a normal bluetooth keyboard to a…
btkeyb
  • 31
  • 2
3
votes
1 answer

Bluetooth bee and different profiles

We got a bluetooth bee for testing purpose on hardware. Unfortunately the device only seems to run SPP. But it seems possible to do more than that. Here's the…
Loïc Faure-Lacroix
  • 349
  • 10
  • 23
3
votes
2 answers

How to build a switch with Bluetooth?

I have a small circuit with a battery and a lamp. If I close the circuit the lamp will turn on, otherwise will turn off. I want to create a very small wireless switch. It will have only 2 signals to understand: Turn On (close the circuit) Turn…
Rodrigo
  • 219
  • 3
  • 17
3
votes
2 answers

Bluetooth LE with BlueGiga devboard (BLE112)

This is my first post so please forgive me for any informality but I will get straight to my point. I am trying to send RS-232 data (8N1 asynchronous at 115,200+ baud rate) from my PIC micro via bluetooth to a smartphone. I have done this…
user15564
  • 31
  • 1
  • 2
1
2 3 4 5