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Questions tagged [bluetooth]

A low-power short-range wireless protocol.

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34 views

Vertical distance from PCB antenna layer to ground plane?

I know the basic design requirements for pcb trace antenna, no ground place below or above the traces, impedance matching etc. But the design layout recommendations for pcb antenna doesn't seems to ...
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0answers
28 views

Diy Bluetooth speaker antenna

I am building a Bluetooth speaker with a 50watt Bluetooth amplifier board which has a pcb antenna,I would like to get around 150to 200 feet range line of sight, what type of antenna would be best for ...
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1answer
55 views

How to remove noise from microphone input?

The Issue I've made a project centred around the XS3868 module which is based on OVC3860. The circuit works fine and I was able to get the microphone to work except for just one thing, the mic input ...
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31 views

Bluetooth RSSI to Distance [duplicate]

I'm trying to find the distance between two bluetooth beacons which are typically in the distance of 60cm or less. Direction is not an issue, I'm only looking to figure out the distance between the ...
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0answers
15 views

Does Bluetooth Mesh allow for segmented unacknowledged messages to be re-sent?

I am trying to develop some performance tests for Bluetooth Mesh. At first I thought my problem was a software one, but I think it might be related to the specification. The implementation I started ...
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0answers
39 views

Stm32 HC-05 bluetooth AT commands not working [on hold]

I'm trying to connect bluetooth module HC-05 to stm32f103c8t6 board via usart. And first of all I've tried to change the device name, but without any success. The module RX output paired with PA9 ...
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0answers
22 views

12v Bluetooth Module Bypass Circuit Needed [closed]

GOAL: Retain dimming function of 12V Bluetooth LED Dimmer module when not bypassed from its power source. BACKGROUND: LED strip is usually connected to a portable 12V source containing a small ...
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0answers
22 views

Does Bluetooth 5 give better range in mobile devices? [closed]

Does an iPad with a Bluetooth 5 sender connected to a Bluetooth 5 device, give a better range than an iPad with a Bluetooth 4 sender connected to a Bluetooth 4 device? If it does, how much better ...
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0answers
16 views

Static noise on a TDA7492 Bluetooth sound amplifier board?

I have a KKmoon TDA7492 bluetooth sound amplifier board with an AUX interface (https://www.amazon.co.uk/gp/product/B075QZ19VJ/ref=ask_ql_qh_dp_hza). The issue I have is that whenever I connect ...
5
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1answer
76 views

What makes Bluetooth v5.0 completely better than v4.2?

I read documents about Bluetooth 5.0 and one of my first sign is, v5 has longer range, higher speed and also consuming lower power than v4.2 . Actually these features should affect each other by ...
0
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1answer
27 views

How to link 3 RF transceivers to 1 antenna

I'm not an RF designer, so excuse the newbie question: How would I link three transceivers, say WiFi and two separate bluetooth transceivers, to a single antenna. I have found a 3-way combiner ...
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1answer
28 views

HM-10 Bluetooth: How to read characteristic data via serial commands

I'm programming an Arduino to use an HM-10 BLE device in Central mode to read a BLE Peripheral. I'm able to discover and establish a connection with the Peripheral (via AT+CONnnnnnnnnnnnn command) ...
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0answers
36 views

How to connect a MEMS Microphone Breakout - INMP401 to a RN-52 bluetooth module?

I intended to use a INMP401 (MEMS MIC) to capture audio and stream it via bluetooth using an RN-52 bluetooth module (RN-52). The RN-52 has inputs for differential +- signals. The INMP outputs ...
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0answers
17 views

RN4871 auto pairing

We are developing an application which needs the BLE Peripheral to be automatically paired with the smartphone when the smartphone is near the BLE Peripheral. We are using RN4871 Microchip BLE Board. ...
1
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1answer
48 views

Using a Bluetooth receiver with 3.5mm jack headset [closed]

For the past 1/2 year I have been using a cordless Bluetooth headset (this one) connected with my motorcycle Garmin GPS device. While connected the device will not allow me to control the volume over ...
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1answer
48 views

Wiring a bluetooth module into car radio, issue with switching between radio and bluetooth [closed]

I have an old Blaupunkt Radio in my 91 VW golf. I have purchased a Bluetooth module from eBay and I have wired the line out from this into the Left and Right inputs to the amplifier that would ...
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0answers
49 views

Can I programming Bluetooth module internal registers through UART?

I have a customized Amicomm A8107 Bluetooth System-in-package (SiP) module for a project in a PCB with a STM32F103Z micro-controller. I have 5 connections between my microcontroller and the BT module: ...
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0answers
26 views

Did anyone managed to use 48kHz sample rate on chinese CSR64215 modules?

I have several chinese CSR64215 modules (BTM625) and it seems no one of them is able to work on 48kHz sample rate. Did anyone managed to use 48kHz on these modules? I tried to use different sound ...
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1answer
23 views

Bluetooth receiver combining differential outputs to single ended (LR, N) to one (main) secondary amplifier

Hello I am new to this forum recently purchased a CSR8645 Bluetooth Module I have a Sony MHC GX Music system with AUX/MD Video Audio input (Left Right Ground). But in my CSR8645 ...
0
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1answer
35 views

Microchip IS1678S Questions - wanting to implement SPP as simply as possible

I'm looking for a solution to implement Blutooth Classic SPP on a chipset. What I'd like is everything to be on an external chip, so I don't have to run any sort of Bluetooth stack on my STM32 which ...
0
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1answer
34 views

Can I make my cellphone a 3.5mm jack bluetooth transceiver? [closed]

I want to hear sound from my TV using my Beats Solo3 wireless headphones the problem is that the TV doesn't have a bluetooth transmitter (or any wireless connectivity) it has USB and 3.5mm headphone ...
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0answers
27 views

How to solder a trrs 2.5 cable to an old charger

I need to solder a trrs 2.5 cable to an old nokia charger, so I can charge my JBL E40BT headphones. My problem is I got the cable from an old set of earbuds, and I don't know what cable goes welded ...
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2answers
50 views

connecting pam8403 and bluethooth module in series

I am new to this so I apologize in advance for any rookie mistakes. I decided to make a portable Bluetooth speaker. I have a pam8403 and a Bluetooth module: Both of them require 5 V input. Can I ...
1
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2answers
79 views

What bluetooth chip should be purchased to solder onto the Nook motherboard? [closed]

From what I researched the e-reader's motherboard contains three unused serial ports that can be connected from gps modules to bluetooth chips. U2713 PIN OUT CLOSEUP The article that gives ...
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0answers
32 views

custom PCB with brd4306A radio board and bgm13p22512GA soc is slower than Silicon labs starter kit

I am using a custom PCB board with brd4306A radio board and bgm13p22512GA soc(both from Silico Labs) on it. It talks to a windows app via BLE(Bluetooth Low energy). I am also testing this ...
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1answer
47 views

Bluetooth Concurrent connection

I have multiple sensors that sends data via bluetooth to my laptop. At present, I can only connect one bluetooth sensor with the bluetooth of my laptop. It needs pairing, and then connects. So if I ...
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2answers
122 views

Planned obsolescence / failure of consumer electronics / kill switch [closed]

General question for those who have worked in the consumer electronics industry: Are small rechargeable devices (like bluetooth audio devices specifically) designed to fail after a set time to force ...
3
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1answer
87 views

What are AT commands ? When to use them?

I read some articles about the AT commands but I am still unable to understand something. As the article says "AT commands are instructions used to control a modem." I used a while ago an Bluetooth ...
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0answers
21 views

How to listen to beacons(broadcaster) using the simple_observer example?

I am using the TICC2640 for this purpose. I am trying to use the simple_observer example from the SDK to listen to beacons. I am able to scan the devices and print their MAC addresses. I am ...
0
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1answer
61 views

How to send notification via bluetooth device [closed]

I am running a Grocerry shop, I want to send offer notification via bluetooth to all my customer who enters my shop. If a customer comes within a range of 10 meter near cash counter auto offer ...
0
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1answer
44 views

Different I/O pins of same PORT of ATMEGA8 not providing exact output [closed]

I have written code to switch ON/OFF some LED light connected different I/O pins of same PORT (i.e PORTD) of atmega8 microcontroller. This process is performed using android app by sending different ...
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3answers
1k views

How can I make Bluetooth (2.4 GHz) reception area narrow and controllable?

There are some Bluetooth modules available on the market, like the cheap HC-05 for 3 or 4 USD delivered. This one mentioned has an internal PCB antenna which I guess has a toroid-like radiation ...
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1answer
74 views

How to use the UART functionality in this Bluetooth module?

I'm using a Bluetooth module called SPBTLE-1S whose datasheet is here - https://www.st.com/resource/en/datasheet/spbtle-1s.pdf In the datasheet, it says that I can use the UART functionality by ...
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1answer
42 views

Wifi/BT on Realtek 8723 - Is FCC, CE certification needed for Wifi if we disable Wifi and use only Bluetooth?

I'm planning on importing a generic mini pc that comes with an onboard Realtek 8723 for Wifi and Bluetooth. We will need to get it FCC, CE, IC certified before we sell it in North America/EU. Getting ...
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1answer
32 views

Putting the CC2541 to sleep

I have a bluetooth module which uses the CC2541 IC. My project is battery powered and so i want to be able to put the device to sleep.i have been looking about trying to find how to do this and it ...
0
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1answer
68 views

Amp for tweeter in bi-amping

I gonna make some 2-speakers Bluetooth PA system, and I chose bi-amping way with active crossover for do it. I have an 60W amp (battery limits) for my woofer. Skipping all the problems on my road to ...
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0answers
42 views

How to create a Bluetooth audio streamer that receives and transmits at the same time?

I want to create a Bluetooth streamer that wirelessly receives audio from a Bluetooth audio player (like smartphone) and then transmits the received audio to a Bluetooth speaker, with no wired ...
0
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1answer
21 views

battery load percentage - concept/definition

I have two pairs of bluetooth headsets which are used interchangeably on my smartphone. One of them can indicate the battery level and the other doesn't. I'm curious to know what this feature is ...
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0answers
22 views

Running BG Scripts on HM-10 Module

I am working on a low power BLE data acquisition system. HM-10 is based on TI's CC2540/2541 which is the also used in BlueGiga ble. I was wondering if it was possible to make BG scripts work on HM-10 ...
0
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1answer
70 views

How to program SoC chips like CC2541F128RHAT [closed]

I am working on a BLE project. As per initial research, decided to use the cc2541 chip as BLE module. I have found one here. As per the datasheet, it shows it contains BLE and MCU. I need to program ...
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0answers
52 views

Arduino Module bluetooth

I have module nRF52810, which I want to load a sample hex from internet. I wanted to use OpenOCD program to that but I have problem when I use that the command ...
0
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1answer
191 views

How to use rn42 bluetooth module with dualshock 3

I have a rn42 Bluetooth module with HID features, now how do I use it to connect to a DualShock 3 or 4 controller with an Arduino. Since the DualShock 3 pairs only to a particular mac address, how to ...
2
votes
1answer
84 views

BLE and Bluetooth Classic Coexistence?

we are designing a fairly compact PCB for a communications device. We are looking at using BLE as a link for voice to a separate microphone, and BT Classic to be paired with a smartphone. We are using ...
0
votes
1answer
52 views

Connect three HC-05 Masters to three HC-05 slaves

I have 3 Bluetooth modules HC-05 connected to my laptop using an USB-TTL interface and 3 microcontrollers each one has its own HC-05 slave. These devices shall send values to my laptop (each slave ...
1
vote
2answers
74 views

What comes after you have programmed a Bluetooth Low Energy chip with Nordic SDK and are ready for deployment?

I am working on this project with bluetooth low energy and it seems I will have to order the Nordic Semi DK kit for one of their nRF51 series chips. I am just curious (and an amateur at this), once ...
5
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1answer
215 views

First Bluetooth PCB

I have a fair bit of industry experience with Electronics Design, as I'm a design engineer for a company in Australia. However, over the last 5 years I've only really specialised in power supplies, ...
0
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1answer
62 views

Adapting an older schematic for use with recent components: How might this circuit need to change?

The schematic below is a bidirectional bluetooth-to-infrared serial device. Computer sends bits to device via bluetooth virtual COM port. Device re-transmits bits via 950nm IR w/ 38khz carrier ...
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3answers
2k views

HBQ-i7 Bluetooth Chip Identification

I was recently in Hong Kong and decided to purchase a knockoff Airpod to tear it down and see how it was engineered to help me in my own design process. I got to the mainboard and found the single ...
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1answer
40 views

Wearable transceiver safety considerations

I am implementing a wearable band that will likely be fitted with a Zigbee or Bluetooth transceiver and worn on the wrist. However, I have seen many articles and datasheets specifying a distance of at ...
0
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1answer
26 views

Bridging 3G/LTE from cellphone to IOT device

I have an IOT device that needs to function as an access point, even without close by wifi signals, and then publish a wifi network. I know that I can achieve this with a 3G/LTE/GSM module but given ...