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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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How is the frequency hopping in bluetooth actually negotiated and how does the algorithm work?

Every book/site mentions the general principle of frequency hopping, but I can't find anywhere that details it out. There must be some deterministic algorithm that says, starting at t0, we will be on ...
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How can I pair my zs040 CC41-a BLE chip to my Android smartphone?

I bought a zs040 CC41-a BLE chip a little while ago with the thought in mind to control my Arduino projects from my smartphone. I followed several tutorials on the internet on how to connect it to ...
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69 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
65 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
70 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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22 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
69 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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37 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
35 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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22 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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1answer
81 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
130 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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13 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
39 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 ...
0
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1answer
51 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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22 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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46 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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24 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
41 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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0answers
33 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 ...
2
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1answer
311 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
57 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
48 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
145 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
94 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
435 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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0answers
59 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
89 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
128 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
101 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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0answers
22 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
83 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
99 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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0answers
32 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 ...
0
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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 ...
3
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2answers
88 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 ...
0
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1answer
178 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 ...
0
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1answer
67 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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0answers
26 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 ...
0
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2answers
70 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) ...
0
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0answers
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-...
0
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4answers
113 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 ...
0
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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 ...
1
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0answers
68 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 ...
0
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1answer
289 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 ...
2
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1answer
32 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 ...
3
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1answer
78 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 ...
0
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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
195 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 ...
0
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3answers
193 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 ...