Questions tagged [bluetooth-low-energy]

Bluetooth Low Energy ("BLE") is a new radio standard, introduced in 2006. Bluetooth Low Energy is a subset of Bluetooth v4.0.

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42 views

Bluetooth vs Bluetooth LE susceptibility to interference

Bluetooth Noob here. We are currently developing a device which utilizes BLE for connectivity with mobile phones. However, we are experiencing a large amount of interference and broken connections in ...
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32 views

Arduino - Connecting to a remote Bluetooth device asking for a passcode

I have worked on many Arduino projects but this time I am facing some hurdle that is too strong for me. I want to use a Bluetooth module as a MASTER. Purpose: Connecting to a camera and sending ...
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130 views

Is it possible to use ESP32, BLE4 or BT 2 and WiFi same time?

I am planning to use ESP32 module to transfer data using wifi (ESP32 web server AP)to remote PC and also the same time I need BLE to communicate with a mobile app and get some data to eps32. so I ...
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29 views

Auto-Pairing of ESP32's BLE

I am working with ESP32's BLE modules. I am trying very hard to make an auto-pairing between two ESP32's to happen. My ultimate idea is to make two ESp32's pair automatically and send data over BLE ...
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How do I get started on my RFID project (beginner)? [closed]

This is related to a recent, off-topic post I had linked here. I'm trying to make this post more for advice on my project, since I'm new to electronics and RFID and not entirely sure what I'm looking ...
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29 views

Connecting BLE module to Lipo battery and recharge it?

I would like to use a BLE module, where I can solder a tactile switch. There should be also the option to charge the module via USB. Earlier I have only worked with breakout boards, where I could ...
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13 views

Regenerate IRK for NXP QN9020 Bluetooth Low Energy Peripheral

According to Bridging the GAP: Bluetooth LE Security Part 3, IRK Re-generation Each time you clear your peripheral’s bonds, and open it up to a new pairing, you should re-generate your IRK. ...
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58 views

What are the Bluetooth (low energy) scan settings of smartphones

My challenge: I'm trying to find out the best timings for a complex bluetooth low energy (BLE) system, where a central station shall be able to connect to smartphones (=scanner) as well as to coin-...
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63 views

I2S to PDM Conversion

We are looking to use the TLV320AIC3111 audio codec to process some sound data that we are receiving from MP34DT05-A microphone. We then look to transmit the data wirelessly over BLE using the BlueNRG-...
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1answer
39 views

What pins on a nRF51822 do I connect to a STM32 programmer?

I want to be able to program a nRF51822 with this programmer but I'm not sure what pins on the actual chip I should use, and all the guides seemed to be using a different chip
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53 views

What is the definition of Bluetooth peripheral device?

What is the basic definition of a bluetooth peripheral device, bluetooth master device and a bluetooth slave device, and what are the functions of each of them? How to define them in a BLE system? ...
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1answer
43 views

MSP432+BLE+ Debugger interfacing

I would like to Interface a BLE to a MSP432 microcontroller in serial. The BLE has a inbulit Atmel controller. I have a firmware for BLE in keil. Intially I have flashed the firmware to BLE directly ...
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157 views

What's the BLE Range?

I am googling too much stuff regarding it and the noise on there has got me completely confused and there is no a single fixed range I should be checking my system with. ( I am software engineer and ...
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1answer
38 views

Pairing vs Master-slave between BT Module to BT Module

If I take two identical BT modules, for example HC05 or HC06 then is it possible to pair the two modules with each other or is it like you need 1 master and 1 slave module for pairing? Edit: Now I ...
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73 views

Bluetooth vs BT Beacon [closed]

While trying to understand how BT devices work I came across another related term "BT Beacon". Is it same as BT communication or if a device is termed as BT beacon then it would have some specific ...
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2answers
46 views

RF Design - Antenna Feed-line Parameters

I am implementing a BLE device with a chip antenna. The device has already been impedance matched to 50Ω and is ready to be connected to the feedline and antenna. The antenna datasheet has a ...
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1answer
19 views

Bluetooth Application File-Sharing [closed]

Is it a practical application to use Bluetooth for file sharing? And is Bluetooth Mesh optimized for this application?
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25 views

Bluetooth Mesh and Bluetooth Broadcasting

I have been reading up about Bluetooth recently and I just want to know if it is correct to say that all Bluetooth 5.0 have the broadcasting feature? Is that the broadcasting feature also found in ...
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94 views

Lithium battery performance in cold temperatures powering BLE Beacon

I am working on a project that requires the use of BLE Beacons in very low-temperature environments, on average -15°C but on occasion as low as -25°C. We are currently trialling a brand of BLE Beacon ...
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1answer
206 views

Bluetooth low energy paired vs unpaired communication

I am looking to seamlessly connect multiple slaves to one bluetooth low energy master, however I do not want to go through the process of pairing each individual device. The pairing process takes too ...
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2answers
435 views

OTA Programming of STM32

I am currently using ST32L152RE controller interfaced with BLE CC2640R2F module and 4 MB external flash memory interfaced through spi. I was trying to upgrade the firmware of my st controller using ...
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27 views

Bluetooth sensor on sports field - multiple antennas

I am creating a tracking project for lacrosse sticks that uses an IMU to give the absolute position of the stick. The goal is to use it to guess the speed of the ball shot, and I will use that as a ...
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1answer
535 views

STM32WB55 Nucleo bluetooth stack firmware binary in bootloader mode

I want to upgrade the firmware for the bluetooth stack on the STM32WB. It requires the device to be in boot loader mode and power from the user USB not ST-LINK usb. However I've not programmed a ...
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99 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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1answer
79 views

SPBTLE-1S - ADC Scan?

I'm trying to use the SPBTLE-1S with 2 analog inputs and read the chip temperature setting, but it seems that if I try to change the mux, it results in garbled readings (eg, temperature reads -120C or ...
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33 views

Decrease the datarate on BLE module for more range

I'm using a HM-10 BLE module with an Arduino for my project and I really need more range. I have read that on the new Bluetooth 5 spec you can decrease the datarate to get more range, is this possible ...
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112 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 ...
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4answers
154 views

How to measure micro watts (uW) [duplicate]

In an extreme low power project (MCU+BLE SIP running on a CR2016 battery for year(s)) I would like to measure the power consumption under different environments/algorithms. What would be the correct ...
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32 views

Set STEVAL-IDB006V1 in advertising mode

I have a BlueNRG USB Dongle (IDB006V1) Eval board that I'd like to set in advertising mode but I just can't get it there as it throws a HCI_HARDWARE_ERROR_EVENT. I'...
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1answer
40 views

Problem with Bluetooth read range for arduino project

I have been working on an Arduino project for a door entry system in my business office but have encountered a problem. I have a group of 8 working in my office but we have a room which only 3 ...
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1answer
222 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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57 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. ...
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113 views

HM-10 sleep mode for CC2541 BLE

Does anyone know when putting HM-10 into auto sleep mode using "AT+PWRM0" (or AT+SLEEP), what sleep mode the CC2541 gets into? There are 3 sleeping modes: PM1/2/3 for CC2541 from the datasheet. The ...
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25 views

BLE VCO Function Divide by 2

Can someone explain or point to some documentation that explains how the RF front-end works for BLE chips? Specifically, I am confused about why the VCO runs at 4.8Ghz and is then divided by 2. I have ...
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199 views

Concurrent central and peripheral mode with BLE

I'm having an ARM M3 which I would like to connect on one hand to a smart phone for data visualization and to two sensors for data acquisition on the other hand. Both connections should be BLE. My ...
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55 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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704 views

When I write data to a BLE Characteristic (FFE1) to send data over bluetooth, is the data encrypted?

I have a very simple circuit which includes a HM-10 that exposes a CC2541 Bluetooth device. simulate this circuit – Schematic created using CircuitLab It's basically just hooked up to power ...
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2answers
161 views

BLE mesh Provisioning

I am new to BLE mesh. I have a doubt that in BLE mesh as per Bluetooth SIG mesh 1.0 spec , if there are hundred unprovisioned nodes, should these nodes be within direct radio contact of the ...
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62 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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1answer
272 views

5V to 3.3V for bluetooth module - Is a voltage divider ok?

So I purchased the JDY-10 BLE 4.0 module and a very small MCU which only is capable of feeding 5v. Since I'm not an electrical engineer, I've been reading a bit on the internet, and so far, I ...
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124 views

Sending few commands with BLE without microcontroller

I am completely new to electrical engineering, but I am trying to build a small device with three buttons circuit, each one of them would send a different command to the mobile phone via Bluetooth low ...
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2answers
1k views

Is BLE 5 backwards compatible to BLE 4.x ? Can a phone with bluetooth 4.x talk with a device with BLE5

I would like to develop a wearable with a BLE5 module. I wonder if this module would work with any BLE4 enabled mobile phone? I am aware with that it may not use the advantages of BLE5, but I don't ...
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Register 2 peripheral UUID with 1 service, NRF52

I have 3 nrf52 boards: 2 act as peripheral and 1 as central device. I want to register 2 different UUID's for the 2 peripheral devices, which contain the same service (0x0001 - NUS for example). I ...
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1answer
170 views

How to associate RX/TX of the BLE RN487x with a LED?

I assembled the scheme suggested by Microchip for the Bluetooth Low Energy BLE model RN4871, pointed out in the schematic of FIGURE 5-4 of the Datasheet (page 26). I've connected a led to Pin 12 (P0_2)...
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1answer
131 views

What is this RF Frontend IC?

This is a picture of the PCB for a Tile Bluetooth tracker. I cant find any info on this chip, and I've looked for a while for the logo. here is a closer picture. The logo looks like three ticks, ...
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1answer
141 views

Alternative wireless technology for passive RFID tags

I am working on a project where I have 3 boxes and a RFID reader (mfrc522) attached at the bottom of each box. I keep my wallet/keys/etc in these boxes and a LCD screen displays what is in each box ...
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155 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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164 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
20 views

RFID Tag, Xbee or Bluetooth Module

I am just trying to detect if an object is within 7-10 feet from my phone. What device would you recommend? I don't care where it is or anything I just need a way of detecting that that device is at ...
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2answers
90 views

Vehicle Diagnostics using BLE?

I have a requirement where the diagnostics of a vehicle has to be carried out using BLE. The number of read/write parameters would be over 300. I had worked on BLE devices in a wearable application ...