A low-power short-range wireless protocol.

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0
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1answer
40 views

Embedded microstrip antenna

How well known are embedded microstrip antennas in general and are they feasible. I want to pot a 2.4 Ghz antenna for product reliability/water and shock proof reasons, but finding information and ...
0
votes
2answers
41 views

Is UART necessary to send AT-commands to Bluetooth module?

I'm looking to alert a connected device over Bluetooth when an accelerometer detects motion. I'm thinking of using the HM-10 Bluetooth module and an ATtiny for controlling the accelerometer. The doc ...
0
votes
0answers
12 views

bluetooth speakers diy hack [on hold]

I have a bose SL 3, which is bluetooth compatible. What I want to do with it, is to assign a priority connection with one particular device (android phone, most likely). What this will hopefully look ...
0
votes
0answers
25 views

Bluetooth module to transmit simple information [on hold]

I have this project where I need to create a electronic box, that receives electrical input, and then sends it to an android application. Right now, I have one pcb model working that is based on ...
0
votes
0answers
27 views

Miniature Bluetooth device selection [on hold]

I am trying to use CC2540 based bluetooth modules, attached to 2 ARDUINO UNOs, to transmit and receive data at rates of 8 Kbytes/sec continuously through a period of 2 hours, with no success. The ...
0
votes
0answers
16 views

What kind of setup and components are in this and how does it work. Also, where can go and find the parts to buy? [duplicate]

This is a sound system I am trying to recreate. It has a 5v fm/bluetooth module on the top of it with a switch to turn on and off.It then runs to a Ceiling speaker with some sort of motherboard in it ...
-4
votes
0answers
72 views

What components is this and how does it work. Also, where can I find to buy? [closed]

This is a sound system I am trying to recreate. It has a 5v fm/bluetooth module on the top of it with a switch to turn on and off. It then runs to a Ceiling speaker with some sort of motherboard in it ...
0
votes
1answer
28 views

Walk-in EMC testing a Bluetooth speaker

I'm hoping to see if my Bluetooth speaker could pass FCC Part 15. No certification is needed at this point - just to purely see if it'd pass when it becomes ready for certification. I believe this is ...
1
vote
2answers
165 views
+50

Maximum Data Rate on BLE Dual Mode Device

Can a Dual Mode BLE device transmit data at the BT (BR or EDR) speeds? I am working on a project that is power sensitive and usually transmits very little data - so BLE makes sense but the device will ...
0
votes
0answers
31 views

100m Bluetooth Range

Is it possible to get 100m of Bluetooth range with a meandering antenna and 10dBm transmit power? I'm using a CSR chip and it's interally limited to 10dBm and won't allow 20dBm. If it's not ...
0
votes
1answer
73 views

What are the Analog to TTL serial ICs called?

I have a sensor that measures an analog value and i want a ICs to convert it to TTL serial , because i want to send it afterwards via a bluetooth IC that takes TTL serial as input. I already have a ...
0
votes
0answers
8 views

How to setup Arduino Wifi Shield with Red Bear Lab BLE Shield? [migrated]

I'm new to Arduino shields. I'm trying to stack these two shields on an arduino uno for a home automation project. 1 - Arduino Wifi Shield: 2 - Red Bear Lab BLE shield: ...
0
votes
1answer
48 views

Atmega328p voltage connections confusion

I am designing a board relying on atmega328p. In order to be able to load the arduino bootloader I added ICSP pins and connected them accordingly. Pin number 2 is VCC pin and I connected it to VCC pin ...
1
vote
3answers
59 views

In-house person identification system

For my smart home, I am trying to develop a system that allows me to identify which person is located in which room. I am a software engineer but I don't really have experience with hardware ...
1
vote
0answers
30 views

Cell phone bluetooth range

I've got this phone I'm doing some range testing with...Namely, a Samsung S5 with the latest firmware and I'm testing the WLAN/Bluetooth radio. This phone has unbelievable range...but, when I replace ...
1
vote
0answers
48 views

How to locate FCC ID of a bluetooth device

I'm trying to find the FCC ID for a super common bluetooth trigger, the one used on all the selfie sticks. I went through each manufacturer name I saw on Alibaba and input their company names into ...
1
vote
1answer
52 views

Is it possible to capture a 433MHz RF signal using the PC bluetooth?

I'm student working on a project at my university where I have to transmit a signal that I'm generating with a micro controller using a SmartALPHA RF Transceiver with a 433MHz signal. I have to ...
0
votes
1answer
46 views

Avoiding heavy controller boards in a MEMS sensor circuit

I am very new to the circuit designing and the "Internet of things" world. I am trying to put together, for simulation purposes, a system that can pull information from a mems accelerometer sensor and ...
0
votes
0answers
59 views

HC-05 Bluetooth AT+INQ command not working

I have followed the directions from the site below for bluetooth comm between an Arduino board using the HC-05 and an smartphone. It works fine. The problem is that I need to measure the RSSI from my ...
0
votes
1answer
72 views

PCB chip/trace antenna located away from board edge?

I'm looking to design a system that will require a 2.4GHz antenna. The only problem is, every single reference design I find has the antenna situated on at least one board edge. Unfortunately due to ...
0
votes
2answers
79 views

Is BLE 4.1 backwards compatible to BLE 4.0 ? Can a phone with bluetooth 4.0 talk with a mote with BLE4.1?

BLE 4.1 is out and it could be considered the biggest news for internet of thing developers. I want to know if my mote with BLE 4.1 can interact with iPhone 6 which has Bluetooth 4.0.
-1
votes
1answer
24 views

RFID reader and bluetooth connectivity

Can an RFID reader detect bluetooth device? I downloaded an application called RFID explorer on my phone. The application helps to get read by RFID readers. I switched on the bluetooth on my phone and ...
2
votes
1answer
63 views

Can Bluetooth beacon be detected while it's in motion?

I'm curious to know if smartphones can actually detect Bluetooth beacon which is in motion, say while driving. Can car A detects the beacon in car B if they pass each other? If yes, what is the speed ...
0
votes
1answer
35 views

Could a HM-10 be powered by a LiPo with LDO?

The HM-10 BLE module has a VDD range of 2V-3.7V. A fully charged 18650 could be 4.2V (even 4.4V?). Could a HM-10 be powered straight off a 18650? Are modules typically designed to run directly off a ...
1
vote
1answer
30 views

Security for Bluetooth 4.0

I know that bluetooth 4.0 is using layer level AES 128bit for security . There is something ,which basically is not clear to me. We are sending data to some BLE ...
0
votes
0answers
17 views

Calculating Bluetooth connection conflicts

I am trying to design a system that gets the maximum possible number of Bluetooth connections at one time. If I put 4 Bluetooth cards in one system How can I calculate the degree to which they will ...
0
votes
1answer
154 views

RN4020 data communication without MLDP

I want to transfer data from my Smartphone to the RN4020 Bluetooth module. The easiest way is to use MLDP service. But I don't want to use it as CMD/MLDP pin is connected to +3.3V. And the only way to ...
2
votes
1answer
285 views

2.4GHz antenna feed routed through pcb via?

I'm working on designing a BLE device, and have settled on using a chip antenna. It seems, however, that my BLE SoC is going to have to be on the underside of the board, which might be significantly ...
0
votes
0answers
34 views

Interfacing two BLE devices with no UI

I'm wondering what the best way to connect/pair two BLE devices which have no screen. Most applications with BLE use a smartphone, tablet, or computer as the central device, and in these cases it is ...
0
votes
1answer
69 views

Building a bluetooth buzzer

I'm hoping to build a simple bluetooth buzzer using a Serial Port BLE module: HM-10. When a slave connected to it, if the slave sends a certain predefined message, the buzzer sounds for one minute. ...
0
votes
1answer
108 views

Does Bluetooth 4 or 802.11b/g/n penetrate through walls better?

I'm thinking of building a signal beacon designed to be used indoors. The transfer speed isn't critical but range and penetrative ability are. Does anyone know if Bluetooth 4 or 802.11b/g/n might be ...
0
votes
0answers
54 views

Sending data from Atmega8 to Android through HC-06

I am building up a communication between Atmega8 and Android device through HC-06. The uC can read the comfortably. But when it sends data the received data is garbage. The baudrate of working UART is ...
0
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0answers
37 views

Bluetooth serial to bluetooth audio module

I was looking to work with a bluetooth audio module but many of the available options are either very costly, unavailable in my region(India) or generally lack some features. What is commonly and ...
2
votes
1answer
77 views

How to make arduino GPIO to operate at 3.3v instead of default 5v

I am working on a project, I use arduino mega 2560 with system operating voltage of 5v, at the same time I have a Bluetooth module which operates at 3.3v is there any way to reduce my arduino output ...
0
votes
1answer
50 views

Two 2.4GHz radio modules (XBee+Bluetooth) on same PCB. How to minimize interference?

I'm designing a PCB with XBee radio module and a bluetooth module (RFDuino SMD with XBee 2mW Radio). Since both of these modules are using 2.4GHz, are there any special consideration about how to ...
0
votes
0answers
26 views

Bluetooth alternative to feed sensor data to mobile device

I want to create a small device which would contain a sensor and send the data from it to a mobile device (assuming Android platform here, but this does not have to be the case). I'm interested in ...
0
votes
1answer
47 views

What is the speed of a baud rate? - RN42

After wondering/researching about this for days, I finally ask this question: What is the speed (bits per second) of a bluetooth SPP RN-42 device? Is 1 baud = 1 bit (thus 9600 baud = 9600 bits per ...
0
votes
1answer
126 views

How do I get a chinese nRF51822 development kit running examples with an ST-link, Keil uVision?

I've been working at this for days with not much information out there to assist me in fixing my issues, so I figured I'd make a post here. I'm using a cheap chinese nRF51822 module and ...
0
votes
1answer
32 views

Can I tell if the HC-06 bluetooth is connected?

I seem to see that the HC-06 device behaves like a serial device with TX/RX. I also understand that this needs to be "connected" to a blue tooth master to send/receive data. Is there a way that I ...
0
votes
0answers
50 views

Bluetooth HC-05 to RN-42

In a project I have the original bluetooth module was an HC-05; however, their was an issue and I had to purchase a replacement. Sadly my local microcenter only had the Parallax RN-42 available. ...
0
votes
1answer
112 views

UART to Bluetooth

I seem to find only partial explanations regarding this question, I've used Bluetooth in previous projects but I plan to use it on an FPGA project. Currently The FPGA is connecting using a UART ...
-1
votes
3answers
85 views

Is there a way to change baud rate of a Bluetooth module wireless?

Or is there any other trick to do it? I need to change a baud rate of my Bluetooth module, I have tried it via Windows Bluetooth settings of the particular Bluetooth device, but that doesn't work. ...
7
votes
1answer
160 views

Should the unused areas on the top layer of my RF PCB have ground pours?

I realize there are some questions that are related to this topic but I didn't see any that are really RF specific. I am working on a 2-layer Bluetooth module and I have some unused spaces on the top ...
0
votes
0answers
62 views

Strange problem HC-06 Bluetooth module not responding after 2 minutes or less

I'm trying to send data over bluetooth from my android application to my pic16f877 via hc 06 bluetooth module . I'm able to connect to my hc 06 module and turn led on & off (by sending 2 string ...
0
votes
1answer
24 views

SPBT2632C2A Operating Voltage Related

It the SPBT2632C2A compatible with a 3.3v Logic System? I was thinking of using it with a BeagleBoneBlack, Absolute maximum rating is rated for 5.5v, So i can feed the module power from a LM1117-3.3 ...
0
votes
1answer
85 views

Can HC-06 be used as a Bluetooth server to which multiple devices can connect?

Title sums it up. I want to use my AVR to be a bluetooth server for multiple Android devices. Is it possible? If iy is not what other method can be used to achieve this?
0
votes
1answer
39 views

Can bluetooth be used in an application of notifying people when their friends are near them, assuming both have bluetooth enabled devices [closed]

I have a project. I want to make people aware that their friends are near them without using any internet. Is bluetooth a better option? Or is there anything better than this?
1
vote
1answer
72 views

After research, how should I go about creating a bluetooth peripheral?

My goal is to create a very simple (1 input, 1 output, both high / low states) bluetooth peripheral to be worn on the wrist to connect to an android phone running Lollipop. I have the following ...
1
vote
0answers
240 views

Serial AT commands with Bluetooth CSR8645 module

I bought a Csr8645 (bleutooth audio module). The module connect to my phone out of the box... It should support some AT commands. So I have tried some but I don't get anything in response. The only I ...
0
votes
0answers
56 views

Connecting a USB device as a Bluetooth slave

I'm trying to connect my Android phone to a USB gamepad via Bluetooth. I'd need a Bluetooth slave with a USB female port. I've done some searching and some asking, but I can't find any devices that do ...