A low-power short-range wireless protocol.

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1
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0answers
34 views

HC05 Bluetooth Module - Certification - Commercial Usage

I'm interested to find out if this bluetooth module can be used in commercial products in Canada? Some of you will say "you can use whatever you want" but I'm not sure, because there's regulations ...
0
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0answers
44 views

What is an acceptable Bit Error Rate for Bluetooth Classic Audio? [closed]

I'm trying to characterize a bluetooth classic system between a source and a sink. I have some data that suggests that the range before the audio gets 'choppy-but-not-bad' and 'choppy-and-...
0
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0answers
29 views

Bluetooth Socket connection with HM-10 [migrated]

I'm using HM-10 4.0 Bluetooth module. I have written an android app. Upon starting the app it will discover nearby bluetooth devices. If it finds my HM-10 Bluetooth module then it pairs with HM-10 ...
0
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0answers
14 views

Low cost, low energy BT receiver that can be triggered by smartphone ? (no serial com req.) [closed]

Hi I am looking for a simple BT receiver device that can provide a simple digital output signal when a BT connection is made to it, and it should be low cost and low energy use if possible. Does ...
0
votes
0answers
25 views

iPhone Notification Bracelet [closed]

I would love to create a device (much like those on the market already) that will communicate that the user's phone has received a text/call. In thinking about this, I am imagining using a vibration ...
-3
votes
0answers
31 views

Arduino BLE Receiver [closed]

I'm trying to develop a solution for an outdoor fair with no access to electricity. I will give each attendant an ID with an Estimote Sticker. What I'm trying to do is add a device that costs less ...
-2
votes
1answer
21 views

BLE-serial module barebone (just need TX/RX and AT interrupt)

I want to add to my project, a BLE module; althought I am totally confused about which one should I get. I did check most of the common chip available; and I do not get exactly if I can just use the ...
0
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0answers
27 views

Have QN9020 Output power to +4dBm? [closed]

The datasheet of BLE-SOC QN9020 says it can have maximum RF TX power as +4dBm by not using internal DC-DC Converter. How to ensure this maximum? It could be below that like 0dBm or something else?
1
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1answer
84 views

Trying to use MUCs to sample data from IMUs over bluetooth at a specific sampling frequency

I am designing a data collecting system and I want to be able to collect the data from both sensors at a rate of 500Hz. I was wondering if anyone could help me calculate/prove this mathematically ...
0
votes
1answer
69 views

DIY 2.4 ghz antenna for Bluetooth Speaker too cut or not to cut

I just built a Bluetooth speaker using a Sure Electronics AA-AB41136 Bluetooth 4.0 Audio Receiver Board. The reception was not great since it is a PCB antenna contained in my speaker box which is made ...
0
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0answers
22 views

Using only Rx pin to receive data from HC 05 and attiny85 (Arduino IDE) [migrated]

I was building a Bluetooth car with attiny85 (Arduino IDE) and HC05 bluetooth module. I need 4 IO pins to control the car, since attiny have only 5IO's. I am left with only 1 pin to connect to HC05. I ...
0
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0answers
10 views

XBee vs Bluetooth vs CC1120 in RSSI variation measurement

I am trying to design a system using a transmitter and a receiver (both of the same protocol/physical layer of course) to detect a breach when a person passes between them. I want to achieve this ...
0
votes
1answer
83 views

Sending resistance values over bluetooth [closed]

I am diving into the deep here, as I am only familiar with audio electronics (guitar related). I thought of an educational project for myself to learn. It should be a miniature solution for the ...
0
votes
1answer
38 views

Matching speaker specifications with bluetooth audio board specifications

As the title states, I am having trouble interpreting the specifications for a Bluetooth audio board I have to determine what kinds of speakers I need, or if I need an amplifier circuit between my ...
-1
votes
2answers
38 views

Wireless 2.4GHz to Bluetooth? [closed]

I've been wondering about this for a while; I have a Wireless 2.4GHz keyboard that requires a USB reciever to catch the signal. How great would it be though if I could use it on my phone, for ...
0
votes
1answer
52 views

Arduino Nano + HC-05 AT not working

I have arduino nano + HC-05 bluetooth module. I have used following pins D9, D10, D11 for HC-05 KEY, TX, RX and this works for data communication without any problems. D9 pin is set to output pin ...
1
vote
4answers
87 views

DC motor causing noise on the power line

I've been building a circuit where I'm controlling a motor using a bluetooth module + phone. I've been having some problems, which mostly are fixed (see topic: previous topic). The main problem I'm ...
0
votes
3answers
74 views

Mosfet motor problems with bluetooth module

I'm playing around with a bluetooth module and want to control a motor using the module and a phone. I manage to control a small motor (±30 mA), but as soon as I'm connecting a bigger motor I'm ...
0
votes
1answer
47 views

Bluetooth pairing on Mac and Windows causes one to dismiss the other

My company is developing a Bluetooth-enabled robotics kit. We have found the following to be true: Pair device to computer A (a Mac) Pair device to computer B (a Windows PC) Computer A is now unable ...
0
votes
0answers
24 views

How to determine the limit to the number of bluetooth masters in a given area?

I am working on concept development for a sensor network and considering scale-up issues. I have found plenty of info on the number of devices a bluetooth master can connect to and I have found a few ...
0
votes
0answers
15 views

cc2640 OAD configuration

I'm working in my application with the CC2640. I have read that I need the CC2540 dongle usb for OAD. I have available two CC2640, is it possible to do the OAD for the CC2640 from another CC2640? or ...
0
votes
0answers
75 views

Difference between Raytac mdbt40 and vanilla Nordic nRF51822

Since I can get easily the nRF51822, but not the mdbt40, can someone give me a brief idea of what is the latter doing more than the former? I want to hook this chip to an arduino, to replace an HC-08 ...
3
votes
1answer
49 views

Step-up Voltage for Bluetooth Dongle to Increase Range?

Here's a bit of background to my enquiry: Recently I've had a project that involved me upgrading my laptop as much as possible, to get it to a standard where I'd have to buy a new machine if I wanted ...
0
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0answers
37 views
0
votes
1answer
63 views

Small bluetooth device (not off the shelf) which sends a single button input to a phone [closed]

What I need is some bluetooth device, that would accept a single button input and send it via blutooth to my android phone. Example commands might be - to stop playing music, forward to next track or ...
0
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0answers
35 views

Bluetooth Class 1 vs 2 and version 4.X

I know that bluetooth class 1 has a range of 100m vs class 2 with a range of 10m. For signal strength within 10m, is there a data-transfer or latency difference between class 1 and class 2 due to the ...
0
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0answers
33 views

simultaneously communicate with multiple bluetooth modules using arduino Uno and HC-05

I want to make a project that in which my master HC-05 module can simultaneously communicate with its entire piconet(7 slave devices all HC-05). The problem is that i cant communicate with more then ...
1
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1answer
53 views

More energy efficient: writing in a SD card or transmitting by BLE for long period?

I need to store about 1 adc sample per second on a wireless project for about 10 hours. The problem is the energy. What is more efficient a constant transmission on BLE or writting each second on a SD ...
1
vote
2answers
110 views

Missing low frequency tones from bluetooth audio output

Currently I'm working on a project which uses a bluetooth module (Bluegiga WT32i) to get audiostreams from my iphone to a 3.5mm stereo jack input for a car AUX input. The problem now is that I have ...
-1
votes
1answer
55 views

Is there a programmable remote vibration motor? [closed]

I am a developer and loves to develop all kind of things for me to simplify my life. Now I'm looking for the possibility to wear a tiny device that receives signals from an app of mine to vibrate when ...
0
votes
0answers
50 views

nrf51822 uart example

I've buy a nrf51822 module with a motherboard. i struggling to programming an uart over bluetooth example but i think something missing. With nrfgo studio i have erased the device and program again ...
0
votes
0answers
34 views

BeagleBone Black wirelessly control a Relay Board

I'm a beginner in the field of Electronics. I'm trying to make a project where Beaglebone is used to control relays to operate a lamp, based on the output from a proximity sensor. The circuit works ...
0
votes
1answer
30 views

How come nRF51822 evaluation kit isn't recommended?

Looking at the nRF51822 Evaluation Kit's page, it explicitly states that it's not recommended and is replaced by nRF51 DK. Does anyone know in what ways the nRF51 DK is an improvement over the ...
0
votes
1answer
36 views

Bluetooth device spurious emissions test

I'm reading an outline of spurious emission test for Bluetooth devices which states that The Equipment Under Test (EUT), a Bluetooth module is switched to a test nullmode in which it ...
1
vote
1answer
52 views

Microcontroller Bluetooth Multiple Connection Support

What exactly is the bottleneck that might prevent a bluetooth device from being able to pair to more than one peripheral device at a time? Is it the connection, antenna, protocol, etc? I'm planning ...
3
votes
1answer
86 views

HCI UART ? what's the difference with simple UART?

For now, I'm sending bytes from FPGA (verilog) to serial at 115200 bps. I would like to send at higher speed and connect to a bluetooth module (RN42). UART (SPP or HCI) and USB (HCI only) data ...
1
vote
1answer
61 views

Audio amplifier car board

I have a old autoradio (cassette and not AUX input ) in my car. But i don't want change because it pretty. I just want to add bluetooth. I leave fm receiver side for the true audio / radio. I want to ...
0
votes
0answers
43 views

PC Cannot Access HC-06 Bluetooth COM Port

I have an HC-06 Bluetooth module connected to an Arduino UNO board to allow for the data received by the Ultrasonic sensor to be transferred to my PC via bluetooth and serial communication. I am using ...
0
votes
1answer
73 views

Beacon: dBm power decrease over distance

I have beacons which advertise their configured data periodically through Bluetooth. The vendor specifies 8 different power options 0 to 7: https://support.kontakt.io/hc/en-gb/articles/201621521-...
0
votes
1answer
40 views

HC-06 bluetooth module working as slave device

When we say that the HC-06 is a slave bluetooth device it means that this device is connected to a Master bluetooth device. But i am a little confused regarding to the data transfer between Master and ...
1
vote
0answers
57 views

Bluetooth connection time

I am using a bluetooth module called HC-05 to connect to a bluetooth accelerometer (a China module called JY-901). For energy saving purposes I have to shut JY-901 down for thirty minutes and then ...
0
votes
1answer
69 views

How does bluetooth sniff mode work?

I wanted to know exactly how does bluetooth sniff mode work. Is this special mode going to affect data rates? Is it used in active transmissions or in idle mode? I am a bit confused.
0
votes
0answers
40 views

Bluetooth communication issue avr-pc

In the last few days I was messing around with avr <-> pc communication. Thanks to the help that I received here I managed to establish a good connection using pl2303 ttl-to-usb converter. Now, ...
1
vote
1answer
36 views

How do I make an electrical signal from a switch into an AVCRP signal to control audio player on my phone

This is my first post here so bear with me. Here is what I'm trying to do: I am making an audio box that receives a Bluetooth audio signal from a mobile device and can rewind or fast forward that ...
0
votes
0answers
55 views

LDO issue, BT powering

I am trying to test my board: I have 2 status pin on BT RN42 to see the connection. The behavior is: - LED2 is blinking every-time since power supply is switched on. - Both LED1 and LED2 are ...
3
votes
2answers
122 views

audio jack detection circuit

i want to build a bluetooth speaker with an additional audio-input jack. When the 3.5mm audio-plug is inserted, i want to switch off the bluetooth-module, so that i can switch between these two audio ...
-1
votes
1answer
123 views

Making a USB port transmit wirelessly via bluetooth

Background: I have an interactive board which I connect to my PC via usb. The usb connection of the board via pc is it's source of power. Any touch on the board is transmitted to the PC in the form ...
0
votes
1answer
173 views

Increase HM-10 Bluetooth range

I recently purchased this HM-10 board. I can connect to it and everything, so it works perfectly. I ran into a problem, the range is only around 7 feet. How can I increase the range? I need it to go ...
0
votes
1answer
72 views

High speed (EDR) data transfer possible with HC-05 bluetooth module?

From what I understand, the popular HC-05 bluetooth module is using a CSR BC417 controller part, which supports EDR for 2/3 Mbps modes, also up to 3Mbaud UART interface for the mcu. Assuming the mcu ...
0
votes
1answer
95 views

How to use hc-05 with pic32

I want to use Hc-05 bluetooth module with my pic32 controller for communicating with other bluetooth devices. I want to test the hc-05 module with my pic32 controller. I have made the hardware ...