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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.

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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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31 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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9 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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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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12 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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23 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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1answer
22 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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30 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
130 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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1answer
40 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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1answer
46 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
100 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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2answers
85 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
240 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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50 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
64 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
127 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
78 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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20 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
54 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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1answer
75 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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30 views

Do Adafruit libraries for BLE tasks sacrifice performance?

Does the Adafruit_BluefruitLE_nRF51 library (compatible with my arduino UNO) sacrifice BLE speed for functionality and compatibility with adafruit's other devices? In adafruit's BLE FAQ page they have ...
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1answer
19 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
68 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 ...
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1answer
150 views

Nordic Bluetooth 5.0 Breakout board

I am highly interested in developing a project involving bluetooth 5.0 on a nordic device, namely the NRF52840. However the package of this device is beyond my capabilities/kit for soldering. I have ...
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1answer
60 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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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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2answers
68 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

Bluetooth Controls instead of R/C Controls for simple Holonomic robot

I am new here and with little experience in electronics. I have assembled this holonomic robot, see link: https://shop.wickeddevice.com/product/omniwheel-robot-complete-kit/ It has 3 Omni-...
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4answers
96 views

Sensing a tag passes through a virtual “fence”

We have two cats who like to hide in our house. It would be great to know where they are in the house. At first I thought about setting up an indoor localization system (iBeacon, etc.) in place, but ...
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1answer
36 views

Is it possible to read/pair ESC (2.4Gz?) signal [closed]

I'm new to ESC, sorry if this is a noob question, is it possible to somehow pair or read the battery level from an ESC? What I'm looking for is to read the battery level from an ESC electric ...
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0answers
65 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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1answer
251 views

RN4020 BLE module authentication without I/O Capabilities and mysterious datasheet

I'm trying to activate authentication for my RN4020 Bluetooth module in a way I dont have to enter PIN or Passcode during this process because my RN4020 wont have any displays or keyboards where to ...
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1answer
31 views

Hooking up a battery to a BLE beacon

I am looking to add a battery to this BLE beacon with as few parts as possible. In their product's datasheet they include a section on an example schematic for adding a battery (included below). My ...
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1answer
75 views

Best communication scheme for a battery-powered Bluetooth LE display?

I have a battery-powered design that I am working on using a Nordic NRF52832. The device is intended to connect to a smart phone and upon receiving a particular message from the phone, flash some LEDs ...
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0answers
37 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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1answer
170 views

Bluetooth LE losing connection

I'm developing a device that operates with Bluetooth Low Energy (BLE). It has a connection loss problem, where it connects and stays on for a while, but most of the time it connects and then ...
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3answers
179 views

Improving battery life: BLE device with a 100uF capacitor

I have a BLE beacon and I was wondering if adding a capacitor in parallel with the coin cell battery would help with the battery life by smoothing out the peaks. The scenario shown in the chart is the ...
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1answer
276 views

Beacon testing Microchip RN4871

I got a Microchip RN4871 BLE Module and want it to act as beacon. So, I connected over UART and executed the following commands: SS,20 SC,2 NB,09,656667 Whether ...
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0answers
273 views

Design of RF Chip Antenna for Bluetooth - 2.4GHz

I am designing a PCB using the NRF52832 and this antenna. The antenna design guidelines suggest ground clearance and direct traces from the NRF52832 to the antenna without the use of vias. However, ...
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1answer
39 views

If two iBeacons are too close to eachother, could their signals get confused for one another?

I have a simple question that I can't find the answer to. I am testing an app with some iBeacons, and I observe that one of my iBeacons never begins to range...the region is monitored, its just not ...
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0answers
72 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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1answer
580 views

Flashing nordic n51802

I have a Chinese rip-off game pad, which has an n51802 which is by nordic. I want to flash my own firmware but i’m unable to find any information about it. I can put it in DFU mode, so it is flashable,...
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0answers
245 views

HM10: central role, read/write characteristics

I'm playing with the well-known BLE module HM10. Here the datasheet. First I set it in peripheral role (i.e. "server") and I was able to connect my smartphone to it, read and write its own ...
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1answer
654 views

Passive Bluetooth Beacons [closed]

I read a white paper earlier on that implied that Passive Beacons were on the horizon (which I will accept could mean 10 years away). My head's spinning thinking about the applications of mixing ...
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1answer
599 views

Using BLE module to detect beacons nearby

I'm trying to design a BLE reader which scans and detects nearby beacons. However in many tutorials I have seen projects which uses Rasberry Pi and some BLE module it requires complex libraries. I ...
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0answers
278 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 ...
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0answers
57 views

how to set up macos laptop talking to zigbee enabled utitlity meter via wireless?

I want to communicate from my laptop to (1) a zigbee smart utility meter via wireless shield (2) read the meter wattage into my laptop (3) communicate the readings from my laptop to a bluetooth ...
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1answer
49 views

Antenna effiency in bluetooth module

So i read alot of data sheets regarding bluetooth modules and when i come acorss antenna section i find that term called effeciency. What is it for ? For example If class 1 bluetooth with 100m range ...
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1answer
146 views

Primary battery dies after 5 months instead of 25

We have designed a PCB with ultra low power Bluetooth module with the objective to run it on batteries for about 2 years. We have measured the power consumption, it is 400uA on average with 20ms peaks ...