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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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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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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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29 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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How to use JDY BLE modules for Bluetooth mesh networking?

I bought some JDY-21,JDY-19, JDY-18 and JDY-17 modules. All of them support Bluetooth 4.2 LE. Some module claim to be able to use mesh with them. So, I watched this video about Bluetooth mesh networks....
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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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37 views

How does Bluetooth Low Energy GPSK modulation work?

Bluetooth low energy uses a GPSK modulation to transmit signals through the air. It uses the 2.4 GHz bandwidth divided into 40 channels, each one with 2MHz. (2480MHz, 2478MHz, etc...) How about ...
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71 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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70 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
48 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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126 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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64 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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95 views

Modify bluetooth low energy scan parameters using hcitool lescan

I would like to scan for a beacon which sends advertising packets every 330ms. The payload changes at every advertising interval so that I have to receive as many packets as possible. I use a ...
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15 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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46 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
52 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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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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18 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
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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
116 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
52 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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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
67 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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36 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
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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
33 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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56 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
190 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
29 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
72 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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36 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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141 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
153 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
206 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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235 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
37 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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62 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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398 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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223 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
504 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
509 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
226 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
47 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
42 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
142 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 ...
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1answer
559 views

nrf52 and Chip antenna Layout Questions

I am designing a four layer stack up PCB having nrf52832 SoC with chip antenna (2450AT18B100 Johanson Technology).It is BLE ...
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192 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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123 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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1answer
128 views

Can Bluetooth Low Energy Beacons act as receivers?

I am working on a project which involves sending data from many BLE beacons to many other BLE beacons. To be more specific, I have two groups of beacons: The first group consists of senders (or ...
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70 views

Problem with I2C and SPI interface using DA14681

We're working on a IoT device using the Dialog DA14681 MCU, LIS331HH accelerometer and MMC3416 magnetometer. everything connects up well and we get readings from both sensors (accel via SPI and ...