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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.

43 questions with no upvoted or accepted answers
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84 views

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
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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1answer
165 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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417 views

nRF52832, using a chip antenna for short range purposes

In the past I have used nRF51822 to make small low powered devices for projects. I have used allready made modules from china (WT51822-S2) and programmed them using mBed. It was really easy but not ...
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1answer
608 views

Power Consumption for BLE advertisements

I have a set of voltage readings that are read at a high rate and they have produced voltage data for power consumption while: advertising events, for connection events, and for no activity. I've ...
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547 views

Microchip RN4870: Can I create a custom GATT Characteristic Descriptor?

I am reading through the RN4870 user guide documentation to try and work out how to implement a HID GATT Service. When I look at GATT specification viewer for the HID service, specifically at the "...
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0answers
106 views

Low Current Consuption on a Voltage Inverter

I'm working with a uC and a Bluetooth Module. I need the lowest current consumption in this project because it is intended to be a mobile device. Thus, I'm using sleep modes on the uC. Now, I've ...
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1k views

Bluetooth low energy: effect of slave latency on power consumption

Slave latency is meant to allow a bluetooth le slave to skip a certain number of connection intervals before actually establishing a connection event with the master. In principal, this seems like it ...
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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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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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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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95 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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0answers
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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2answers
164 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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86 views

Bluetooth LE (BLE) pairing behavior

I played with a BLE device recently (VSN V.BTTN) and was able to get interesting functionality with the button and a Raspberry Pi. However, I still have a few questions regarding the device pairing ...
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358 views

Tuning Chip Antenna

I am designing a BLE board with nrf52832. This is the first time I am designing a board having a RF part. After considering MIFA ...
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242 views

How is BLE data converted to UUID (and how can i convert it back?)

I am developing a BLE Android application that can receive small messages from a beacon. As a test I am letting the beacon increment a counter and send this as a string (service_data=str(counter)). I ...
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0answers
351 views

Bluetooth BLE ILT254s

I want to understand a little how a BLE module works. I have the following module ilt254s(the small version) but until now I was unable to communicate with it. Here is the datasheet. I want to be able ...
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0answers
336 views

Using nRF8001 as a master with an FPGA

I would like to use Nordic's nRF8001 modules in Master and Slave modes and also would like to connect it with Spartan-3E FPGAs using SPI. I am considering buying the nRF8001 DevKit. I believe it is ...
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1answer
139 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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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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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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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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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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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
224 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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116 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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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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1answer
171 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
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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1answer
83 views

How add a chip antenna for the Bluetooth of the module BCM4339?

I have the following concern in a design that I am carrying out. I am working on the development of an electronic prototype that uses as a CPU the module: PICO-IMX6-SD. This module has wifi and ...
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2answers
78 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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39 views

Maximum Bluetooth LE devices near each other

I am planning to put 100+ Ruuvitag beacons(Bluetooth LE tranmistters) in a ~120m2 area. There will be approximately 1 meter distance between devices. I need to get their advertisements at once(each ...
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100 views

nRF51822 bricked after faulty boot loader

I have a custom board (a chinese game pad) which uses a chip named n51802, which according to nordic is a “custom” nrf51822 - completely compatible with it though. I “accidentally” (fiddling around) ...
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0answers
397 views

Designing a BLE reader to detect nearby bluetooth beacons

I am new to this Bluetooth beacons and I'm trying to create a project where multiple BLE beacon readers are installed in a yard which detect the beacon modules and helps to locate the location of each ...
0
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1answer
188 views

BLE beacons Flag

I have some BLE beacon modules and I want to make an indoor positioning system with them. There is a problem with my beacons that they are not always discoverable (when scanning with an Android app) ...
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2answers
112 views

Which remote communcation type should I use?

In my project I have to give only 4-digit number to each device(50+ devices) without any wire. And there will be only one transmitter for all receivers. Which communcation type should I use? ...
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1answer
320 views

Bluetooth 4.0 - stream mode

I want to use Bluetooth 4.0 protocol for stream communication between MCU(STM32) and Android/iPhone smartphone. Does Bluetooth 4.0 supports any other case scenario than usual(Heart monitoring, fitness ...
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1answer
75 views

Cost effective way to communicate data between a force resistor and a raspberry pi / Arduino

I am looking for a cost effective way to communicate data between a force sensitive resistor FSR402 to a raspberry pi/Arduino wirelessly. I am open to using BLE / WiFi / Radio Communication. The ...