Questions tagged [bluetooth]

A low bandwidth, low-power short-range wireless protocol typically used for personal area networks that operates on 2.4GHZ-2.485GHZ.

Filter by
Sorted by
Tagged with
0 votes
0 answers
38 views

Cheap dev boards [closed]

I’ve been looking around at different development boards like Arduino and Espressif’s products (for small IoT projects), and I have wanted something small, cheap, and easy to use. These are the ...
0 votes
1 answer
22 views

Bluetooth module GPIO control

Note: This is my first real electronics project I've worked on by myself so I might just be asking a dumb question or this might be in the wrong forum. I am trying to figure out the hardware side of a ...
0 votes
0 answers
20 views

Dabble app glitch [closed]

I wasn’t sure where to post this question, so I just put it here. I’m currently working on a remote controlled car project, using an esp32 dev board. I am using the Dabble app from stempedia to ...
-1 votes
0 answers
18 views

Control Bluetooth headphones with NodeMCU [closed]

I have JBL Bluetooth headphones which I intend to use without a smartphone. I plan to control them using a NodeMCU and a custom PCB with minimum size soldered onto the headset itself. Essentialy I ...
  • 1
2 votes
1 answer
25 views

Using SWRA117D 2.4 GHz antenna on a large board

I've added the board image. There is one ESP32-C3 on a 2 layer FR-4 board. My question is, how much I'm compromising with the efficiency of the antenna by placing it on a ~52X85mm board considering ...
2 votes
1 answer
69 views

CE certification of new project Radio Equipment Directive

I work at a certification Institute of construction products, but sometimes we do consultancy on other related products. Recently, a manufacturer asked us a regulatory/certification study on his new ...
2 votes
0 answers
33 views

How to connect the VNA to RF transmission line for antenna tuning?

I am working on a 2.45 GHz(Bluetooth) project. the design has a Chip antenna with 50 Ω impedance trace to connect antenna and chip. I intend to tune the antenna impedance using the Pi network using ...
  • 21
0 votes
1 answer
24 views

USB Shield for Arduino UNO not registering a device

I have several USB host shields which I intend on connecting to an Arduino UNO so I can connect a PS3 controller which will be used to control some electric motors controlled by an L298 H Bridge. The ...
0 votes
0 answers
44 views

Can't send more than 160 bytes to module using Bluetooth on Android

I am unable to send more than 160 bytes to a Bluetooth (BLE) module from my Android application. I am sending data from my modified FastBle Android app to a microchip RN4871 Bluetooth module. I'm ...
  • 11
1 vote
1 answer
47 views

TC4056A shuts off at maximum volume (Bluetooth speaker)

I am trying to build a DIY Bluetooth speaker using a 18650 battery cell, a TC4056A battery charger board, an XY-016 that raises the voltage to 6.5 V, a 2200 μF capacitor, and a CSR8645 board. I am ...
1 vote
1 answer
74 views

How does AirTag achieve the same accuracy when there is an obstruction?

I'm trying to figure out how AirTag achieves the same accuracy when there are objects inbetween the tags and iPhone. Traditionally, if we are using Bluetooth, the RSSI value drops when we place an ...
0 votes
0 answers
31 views

Identify manufacturer and chip - AD9R682-21A

Can someone help identify the manufacturer of this chip? Or a link to a similar chip? The markings are: AD9R682-21A 1631NRZ It is in a bluetooth speaker. It has CLK, DAT, CMD, and ADKEY test point ...
2 votes
3 answers
151 views

Audio frequency response over Bluetooth

Introduction : Using some binaural beat meditation, the vendor claims that their sound frequency goes down to 5 Hz to get better meditation quality. Even though the human ear can't hear 5Hz, the brain ...
  • 573
0 votes
1 answer
25 views

AT+ROLE = 1 is not working in hc-06

I'm try to study master - slave by using aduino with hc-06. I checked AT command is working ( ex) AT -> "ok" , AT+NAME ... ) I tried to use command AT+ROLE = 1 but it is not working. (...
0 votes
0 answers
47 views

Equipment with two 2.4GHz radios

Never even thought about this, RF is not exactly my field. However, I need two Bluetooth modules (one is classic, the other low energy, I can't use a single module) on the equipment. I have access to ...
0 votes
0 answers
28 views

Bluetooth Data Connectivity issue

I am using an RN42-I/RM Bluetooth Module, ADS1298IPAG and dsPIC33EP256MC202 206 IC 16 Bit Micro Controller & Digital Controller. The problem I am facing is initially the RN42 Bluetooth module will ...
0 votes
1 answer
46 views

How to detect if a user has gone past certain locational boundaries physically [closed]

I want to write some software that takes the location of a user's phone and makes sure it is within a certain boundary that is set by "invisible fences"; see the picture below. What kind of ...
0 votes
0 answers
142 views

PS2 Controller to Bluetooth HID Gamepad

I'm planning to make a PS2 Controller Bluetooth Adapter similar to what EvanKale did in his Bluetooth PS2 Controller [Instructables][www.instructables.com/Bluetooth-PS2-Controller/] and Bluetooth PS2 ...
  • 1
0 votes
0 answers
41 views

HC05 Bluetooth Module with Pi Pico Not Discoverable

I have a HC05 Bluetooth module wired up to my Pi Pico with the following code. ...
2 votes
2 answers
448 views

How to Solder RN-42 to a Breakout Board

I have an RN-42 Bluetooth module (without any of the breakout boards), and I would like to use the RN-42 for data logging (e.g. temperature, humidity etc) via Bluetooth. What components do I need and ...
  • 29
0 votes
1 answer
165 views

Can I solder a wire antenna to the exposed PCB antenna of a BBC Micro Bit to boost its bluetooth signal?

Can I solder a wire antenna to the exposed PCB antenna of a BBC Micro Bit to boost its Bluetooth signal for both transmitting and receiving data? Can I solder this type of 2.4G antenna to boost the ...
0 votes
1 answer
68 views

How to disable Bluetooth temporarily for line in to work in mini hifi amplifier TDA7492P? [closed]

The TDA7492P, a mini hifi amplifier with Bluetooth and line in does not allow line in, it jumps to Bluetooth soon after the start and blocks the line in signal. It goes like this: Power on line in. ...
0 votes
0 answers
19 views

Multi slot advertisement on Bluetooth

I'm using BlueNRG-M2SA in a project. This device sends the same advertisement data on every selected channel. I'm looking for a way to send different advertisement payloads on each channel. For ...
  • 326
1 vote
0 answers
50 views

Cheap Bluetooth receiver noise reduction

I bought this cheap audio receiver on a whim and found it was quite noisy on the audio channel. I know it's a piece of junk, but I thought it would be an interesting exercise to learn what was wrong ...
  • 64
0 votes
0 answers
34 views

Max range between Bluetooth 5 LE device and a smartphones

What is the maximum range achievable between a Bluetooth 5 LE device and a smartphone? This would be assuming ideal outdoor condition with no obstacles etc. The amount of data to be transferred is ...
  • 1
0 votes
0 answers
21 views

Going from AT-09's (BLE) Breadboard to it's SMD version

I want to go from this, https://www.amazon.com/Android-Bluetooth-arduino-Wireless-Compatible/dp/B07VDJR4JF?th=1 to this https://tiendaityt.com/modulo-bluetooth/9442-at-09-smd-modulo-bluetooth-40-ble-c-...
0 votes
0 answers
59 views

Is Bluetooth a bottleneck for audio quality when using a headset?

Context - My hearing impaired friend cant hear me well when I use a Bluetooth headset A close friend and I enjoy talking on the phone while commuting. Unfortunately his hearing has gotten worse (...
1 vote
1 answer
54 views

What is the Bluetooth Version of CC2541 (HM10)

I am looking at the Datasheet of HM10's IC (aka CC2541), and it says "Bluetooth v4.0 Compliant Protocol Stack" at page 2: But in TI's website for this IC, they say "Bluetooth Low ...
1 vote
2 answers
82 views

Horrible buzzing on custom car bluetooth

I've got an older vehicle that is wired for a CD changer. I'm using a few components to trick it into playing Bluetooth. Components MCP2025 Transceiver for car's LIN bus Regulates voltage (>12V ...
  • 143
0 votes
0 answers
32 views

Avoid registered naming with a specific technology

In order to avoid possible conflicts with Bluetooth SIG, I would like to know if there's an easy way to refer to this technology without naming it, such as BT, or BLE, so that the user understands it.
0 votes
1 answer
87 views

Will a 4 lane PCIe device work if plugged into a PCIe socket the only 1 lane electrically connected

I am designing a motherboard that uses a SMARC format plugin card for the CPU. This card is based on an Intel Atom x6413E CPU. The SMARC CPU card has various interfaces available, including USB2.0, ...
1 vote
1 answer
99 views

Can I have a microcontroller with one I²S module as digital signal processor?

I was not very sure what title I should use, but the idea is: We have a Bluetooth module (BM64) and a DAC (PCM5122.) We want to put the microcontroller (STM32 Nucleo-F303K8) in between for digital ...
  • 11
0 votes
0 answers
22 views

Bluetooth pairing in wireless keyboard

I am trying to create a wireless USB keyboard. Currently, I have all the USB output information coming from a microcontroller and into an EFR32BG1 bluetooth chip and I have a BT851 USB transceiver to ...
1 vote
1 answer
70 views

Data noise in bluetooth headset when coupled to an analog(ue) audio mixer via signal transformer

Long time (lurker) fan of StackExchange, first time poster. I am attempting to connect an Astro A50 bluetooth headset via its own basestation's analog(ue) combined line input/output (4-pole CTIA ...
  • 21
0 votes
2 answers
72 views

How to enhance existing Bluetooth antenna on audio device (Pro-Ject BT Box E)?

I recently got a Pro-Ject BT Box E which is a BT receiver and DAC that sends the sound to an audio amplifier. The problem is that the range is so lame (less than 2m for undisrupted listening.) I've ...
2 votes
2 answers
78 views

What are the advantages of Zigbee over Bluetooth?

What are the advantages of Zigbee over Bluetooth? I have only been able to find this advantage: It is flexibly expandable and passes on commands that are not intended for this device. It therefore ...
  • 183
1 vote
1 answer
77 views

RF direction finding

Is it possible to build a system of antennas to find the rough direction of a radio frequency emitter such as a WiFi router, a Bluetouth tag, or, a 5G cell tower? I cannot use distant antennas to use ...
  • 113
0 votes
0 answers
93 views

Noob DIY Bluetooth Soldering Question

I need your help to convert my earphone with boom mic to Bluetooth using this transmitter receiver. The problem I am facing is that once connected this device does not use the boom mic rather built in ...
-1 votes
2 answers
59 views

What is the best way to achieve triggering a function on device contact?

Let's say I have a smart pen. It has a microcontroller that can communicate with my server. I want to have a really small and flat gadget (let's call it The Receiver) that when you touch it with that ...
0 votes
0 answers
34 views

Possible OBD-II/OBD2 connections for development phases

Is there any paper/document that summarizes all connection scenarios or cases when you are developing an OBD-II/OBD2 project for automative/car electronics? For instance, Scenario 1 : Real car -> ...
  • 101
1 vote
1 answer
126 views

BLE: HM10 indicate no read property when characteristic has read property

I am attempting to use HM10 as central to read data from a sensor. The HM10 has been flashed with the latest firmware V710 to use the self learn functionality. Here is the list of messages I am ...
-2 votes
2 answers
65 views

Do I require an amplifier?

I am planning to do a simple DIY project to replace the cable on my Sennheiser HD 598, which has 50Ω impedance, with a bluetooth receiver, a 3.7V 1000mAh battery (and a charging board). My calculation ...
0 votes
3 answers
97 views

Measure ball speed with sensor inside

I came across a product which is a ball with a small Bluetooth sensor placed inside. This sensor, coupled with an app, can measure ball speed, height and length of throw. I wonder how this is possible,...
1 vote
2 answers
44 views

Bluetooth range extender for audio component

I have a Tascam CD-200BT audio component that is a Bluetooth receiver that I have installed in my school's gymnasium. Because of the location of the rack mount, I'm worried that the internal antenna ...
2 votes
3 answers
3k views

ESP32 classic Bluetooth set password

I am using the ESP32 classic Bluetooth feature for data transfer. I am using the SerialToSerialBT example. I am able to scan and discover the Bluetooth device from my smartphone, but the pairing is ...
0 votes
1 answer
80 views

Piping bluetooth signal throught internet

I'm wondering if there is a way to pipe the signal of a Bluetooth device through internet and repeat it from another location. In detail, I have a device "transmitter1" that can establish a ...
  • 103
0 votes
1 answer
404 views

Can ESP32 BLE be server and client at the same time?

I'm trying to make smart social distancing circuit for COVID 19. I plan on using ESP32 for this. But it would be good if ESP BLE could be client and scan for other Bluetooth devices at the same time. ...
-1 votes
1 answer
64 views

How does PC install drivers and device info? [closed]

Can someone please explain how a PC knows all the info of a device as soon as you plug it in? How can I add this functionality to a bluetooth or USB device?
0 votes
0 answers
209 views

Help me pair with multiple Android devices using HM-10 BLE

I have a simple home automation project using an Arduino, HM-10 and relay to switch ON/OFF a connected load using an app made in Kodular (free online APP creation site.) The HM-10 BLE module is ...
  • 31
1 vote
0 answers
118 views

Bluetooth scan response and inquiry response

I was trying to understand basics of Bluetooth. I have few queries regarding the scanning and advertising of classic and low energy Bluetooth. Where is EIR data (classic Bluetooth) filled in extended ...

1
2 3 4 5
17