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Questions tagged [bluetooth]

A low-power short-range wireless protocol.

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18 views

Connect a microcontroller with Bluetooth to ssd1306 OLED

I need a small (max 15x40mm) programmable microcontroller with Bluetooth which have at least 3 GPIOs (i need 2 for display and one for a analog switch) and support I2C communication for ssd1306 OLED. ...
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2answers
68 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
29 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
38 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
115 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
83 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
18 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 ...
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1answer
24 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 ...
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26 views

How to use JDY BLE modules for Bluetooth mesh networking?

I bought some JDY-21,JDY-19, JDY-18 and JDY-17 modules. All of them support Bluetooth 4.2 LE. Some module claim to be able to use mesh with them. So, I watched this video about Bluetooth mesh networks....
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19 views

Differential to single ended - Design bluetooth for car stereo

I'm trying to install bluetooth to my car through cassette tape deck(aux already installed). So I find board with CSR8675 which supports APTX-HD https://www.aliexpress.com/item/-/32817838770.html ...
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0answers
35 views

CSR8635 bluetooth chip

It is common knowledge that Csr8635 chips is capable of receiving audio and playing. The question is if it can send (transmit) audio as well? If not what is the role of MIC input pins on the chip??
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1answer
42 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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0answers
23 views

Force sensor for real time control application

I am designing a 6 axis force sensor for a real time control application. I use a STM32F446RE MCU to sample 6 ADCs simultaneously through SPI bitbanging. Each ADC sample is 24 bits. I then do some ...
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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
65 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
38 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
28 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 ...
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1answer
59 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
40 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
16 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 ...
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1answer
47 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
45 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
133 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 ...
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1answer
56 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 ...
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1answer
29 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 ...
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2answers
67 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
207 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, ...
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1answer
61 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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0answers
59 views

PIC12F1572 problem to connect to HC-06 module USART : error in communication although the baud rate is correct

I am trying to connect a PIC12F1572 to HC-06 module. I have found some code online to connect the HC-06 with a PIC16F84 and I tried to change the code for the PIC I used by following the guideline of ...
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3answers
1k 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 ...
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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 ...
0
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1answer
78 views

Bluetooth audio circuit noise problem

I am working with a bluetooth audio circuit. I am facing noise problems in the mic input so I used B0505S DC DC isolated module. It worked but now when I printed a PCB of the same circuit and I am ...
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0answers
43 views

Can a GPS Module and Bluetooth Module use the same RX/TX Ports Arduino

I'm wondering if I can use the same ports for the GPS module and Bluetooth module? I want to find my location and then Bluetooth it to my phone but both require RX/TX ports. Is this possible if I ...
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1answer
288 views

JDY-16 Bluetooth Rx/Tx Connection

How i can make jdy-16 to arduino rx/tx connection? http://prntscr.com/k4dmqg 01 pin > VCC 24 pin > GND 19 pin > TX 20 pin > RX But device doesn't answer AT COMMANDS! When i connect jdy-16 with ...
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2answers
71 views

Ignoring switches in a device

I'm assembling a bluetooth speaker as DIY project. i'm stuck with bluetooth receiver module which have inbuilt push button (hold for 5 sec) to start/stop the bluetooth receiver. I want to ignore that ...
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3answers
208 views

What this NPN transistor circuit do?

I need some help to figure out what this NPN transistor circuit do, how it works and why it's needed in order to make the CSR64215 bluetooth chip work. Here's the schematic: And here's what MFB ...
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1answer
64 views

Buried microstrip vs Top Layer

I'm making a prototype that uses, among other things, a bluetooth mcu connected to a 2.4GHz chip antenna. Its using a 4 layer PCB, and I'm thinking about what to do with the feedline, whether it ...
0
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1answer
274 views

Bluetooth headphones pair to some unknown device. Can't pair to my source [closed]

Apparently, there's some BlueTooth source in the building with a policy of "pair to everything". I am NOT able to find that and snap its neck off! For the headphones: I use the "restart" procedure, ...
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0answers
23 views

bluetooth chip scanning problem

i am using a bluetooth low energy chip v4.2 (RN4870) in my project. Problem here is when the chip is scanning (BLE central mode), it can only finds and returns information of some devices and others ...
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0answers
67 views

RS-232 signals on Bluetooth modules like HC-06, HM-10, etc

I would like to access any I/O pins of a bluetooth module of the likes of HC-06, HM-10 or their clones from both a Windows PC and/or Android system connected wirelessly to the module. I need Windows ...
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0answers
72 views

Multiple connection of bluetooth to android

I am working on a home-automation project where i want to pair multiple bluetooth HC-05 model to my android phone. But the PAIRING only works with only one module at a time. Can anyone help me with it?...
0
votes
1answer
60 views

Creating a Bluetooth input device for PC

I am currently working on a customized input device. Since the Bluetooth connection from the controller to the PC is not as easy as I thought at first, I decided to use a controller which already ...
0
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2answers
67 views

Bluetooth programmer

Someone know if there is a way to program uC via bluetooth? I'm referring to a device that receives an hex/elf file from another BT device (smartphone or PC) and sends it to a uC (xmega in this case) ...
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1answer
32 views

Is it possible to use multiple bluetooth profiles for a pair of devices?

I have a project in mind that uses Bluetooth and I'm currently doing some research. What I have in mind is to build an app that can send audio signal via bluetooth to a raspberry pi 3 and be able to ...
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2answers
292 views

Can I wire 1 more bluetooth antenna to extend the range?

I want to extend my bluetooth range for my Sony Playstation 4 to be able to play in different rooms. I have added an external antenna by taking off the original one and replacing it with a removable ...
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1answer
93 views

Powering Atmega, DAC and Bluetooth in Car

I'm looking for a proper power supply schematic which would fit my needs and would have all required protections (overcurrent, overvoltage, reverse current, etc) for use in car. I want to power Atmega ...
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1answer
695 views

bluetooth: Can i connect multiple hc-05 slaves to one hc-05 master?

I am completely new to the bluetooth world so please bare with me. Can one hc-05 be the master and connect to multiple hc-05s slaves? I've done a lot of research and some say it can and some says it ...
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0answers
52 views

HM-10 does not exit AT mode

I have a HM-10 (probably a clone) which I managed to get into AT mode quickly (by shortening 5V and GND prior to connecting it to the ESP8266 where it's running on), and I can configure it, but I just ...