A low-power short-range wireless protocol.

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0answers
16 views

Bluetooth 2.1 better than 4.0 for audio through headphone listening? [closed]

Was buying a headphone, but found that it supports bluetooth 2.1, it says it makes no difference if bluetooth 2.1 or 4, is that true? Thanks
0
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0answers
27 views

Wireless or Bluetooth Distance Measurement Sensor [closed]

Can anyone suggest a small size (less than 1 inch diameter) sensor that measures distance in millimeters (from 5 mm to 100 mm)? It needs to be powered by coin cell with support for wifi/bluetooth ...
0
votes
1answer
36 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
67 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
68 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 ...
-1
votes
0answers
35 views

Bluetooth range detection

I am trying to detect with my raspberry pi all devices with turned on bluetooth in my room. I want to gather all mac addresses and somehow distinguish distances of devices from raspberry. For ...
0
votes
1answer
41 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
23 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
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0answers
11 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
1answer
27 views

Can I put my sensor data into an Eddystone/iBeacon UUID? [closed]

I am making a device with a weight sensor and would like to have fifty of them in a room. The output of each sensor is a two-byte value, so I thought it would be a great match for Eddystone! But I ...
0
votes
0answers
24 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 ...
0
votes
0answers
31 views

Arduino Uno's RX and TX lights not blinking. Unable to upload sketches! [migrated]

When arduino starts up, RX TX lights doesn't blink. Only the PIN 13 and Green light turns on. Pin 13 light blinks thrice before getting stable. RX TX lights are not blinking at all. I am not able to ...
3
votes
1answer
43 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
33 views
0
votes
0answers
22 views

Short period of noise after audio stops?

I am building an audio amp based on the TPA1517. I added a bluetooth module to it and I noticed that now wired or bluetooth, once the music is paused, there is a few seconds of noise, a pop, and then ...
0
votes
1answer
55 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
votes
0answers
5 views

Send Photo with Arduino Uno [migrated]

I'm new at Arduino projects. I googled but I couldn't get quite answer. I've got: Arduino Uno R3 Clone 4 pin push button 3 color RGB LED Module HC06 Bluetooth-Serial Module Card Arduino PIC ...
0
votes
0answers
33 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
votes
0answers
28 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
vote
1answer
51 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
99 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
47 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
33 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
31 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
28 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
31 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
48 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 ...
0
votes
0answers
35 views

Pair two RN52 Bluetooth audio modules using single button

I'm doing a project that I wanted to connect two users through RN52 Bluetooth audio modules. both of users have mic and headset for the communication. I decided to user HSP Bluetooth profile for this. ...
3
votes
1answer
70 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
51 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
36 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
62 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: ...
0
votes
1answer
34 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 ...
0
votes
0answers
70 views

change device name of PT-810 bluetooth audio stick

I got a bluetooth audio receiver USB-stick and it identifies itself as PT-810. I want to change the device name of it. I read this two questions, so it is possible maybe. I want to interface this ...
1
vote
0answers
55 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
47 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
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0answers
33 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
35 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
106 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
107 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
145 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
0answers
42 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
93 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 ...
0
votes
2answers
83 views

Wi-Fi vs Bluetooth communications to android phone

I am interesting in getting a device, (bare metal micro-controller with sensors), to communicate to an android phone. The device is not wearable and the power difference between Bluetooth and wifi as ...
1
vote
1answer
56 views

Difference is Bluetooth Smart and Bluetooth audio

My name is Raveen Baloo. I have been doing a lot of research on the types of Bluetooth module. For my project, i do need a bluetooth which will be able to have simple communication with a mobile app, ...
1
vote
1answer
288 views

Factory Reset a HM-10

I had programmed a HM-10 module to act as iBeacon with my Arduino Uno's serial monitor using the following steps: AT+RENEW Restores factory defaults AT+RESET Reboot HM-10 AT Wait for OK ...
0
votes
1answer
66 views

Dual mode Bluetooth for transmitting audio and connecting with an App [closed]

​Hi my name is Raveen Baloo from Singapore. Currently, I'm working on a project, building a case box which has a MCU and a LCD screen. A removable bluetooth dongle is connected to the case box which ...
0
votes
0answers
67 views

Is it possible to read RFID card and trasmit the data to Android device using bluetooth transceiver without using any microcontroller? [closed]

My aim is to read RFID card and have the data on android device using bluetooth. Devices I am thinking of use are 1. RDM6300 RFID Module - RFID Reader 2. Bluetooth Transceiver Module Do suggest any ...
0
votes
0answers
115 views

Using USB Bluetooth receiver with speaker

I built this USB/9V mini speaker: I want to add Bluetooth support to it, so I bought this cheap USB Bluetooth receiver. My plan was to remove the plastic casing and the USB plug and add it to my ...