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Questions tagged [bluetooth-low-energy]

For questions related to the use of a Bluetooth Low Energy (BLE) wireless personal area network in IoT devices.

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Questions about BLE Mesh utilization alongwith WiFi for SmartHome sector

I'm having a system meant to run a product, wherein it uses Wi-Fi for now, for an initial market being the Smart Home, with future looking to focus on both Smart Building and Industrial IoT sectors. ...
Hamza Hajeir's user avatar
1 vote
1 answer
29 views

Where is BLE Current Time Service Data format?

I find https://www.bluetooth.com/specifications/specs/current-time-service-1-1/ but can not get data format. Where give me those info?
王烁然's user avatar
2 votes
0 answers
167 views

How to retrieve the Identity Resolving Key (IRK) of a bluetooth device on a windows PC

I'm trying to retrieve the IRK of a BLE device to use with Home Assistant's "Private BLE Device" integration, but I don't know where to find it. I've tried looking in the Device Manager and ...
Veillax135's user avatar
3 votes
0 answers
26 views

How to use multiple characteristics when implementing Bluetooth Low Energy on HM-10?

I am implementing BLE with a HM-10 connected to an arduino UNO. I have encountered an issue where attempting to add another characteristic results in the overwrite of the first one, leaving me with ...
Giorgi Datunaishvili's user avatar
0 votes
0 answers
48 views

How do I detect button presses from a ble device?

I've been working on an app in flutter that connects to a ble device and responds to button presses from the device. I've tried various packages and frameworks and none works. I decided to try nrf ...
user22329354's user avatar
0 votes
2 answers
109 views

Sending sensor's binary signal to the cloud through a wireless settings

I’m relatively new to iot and I'm looking for ways to send a binary signal from a tiny sensor (size of a coin) to the cloud through a wireless setting.  Basically, sensors would emit a simple binary ...
Alex Martin's user avatar
0 votes
1 answer
30 views

Help selecting a microcontroler

I need you help, currently I`m searching for a microcontroller That supports ultra power mode. Has bluettoth support. Can be waked up by a wireless interruption. The microcontroller must be powered ...
Adrian Cojocari's user avatar
0 votes
0 answers
78 views

Choosing BLE beacons and gateways

I don’t get what is the difference between different beacons. For example, the Meeblue M52-SA costs 10 USD, approximately, and the Estimote Proximity beacon costs 25 USD. Both use Bluetooth 5, their ...
Unnamed's user avatar
  • 101
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0 answers
201 views

What is the difference between a GATT Unit and a GATT Characteristic?

I am setting up an Arduino to collect temperature and pressure data, and I want to broadcast that data via bluetooth. My question boils down to what allocated UUID is best for my characteristic, and I ...
helpful_rabbit's user avatar
1 vote
1 answer
139 views

Is a mobile device to IoT device bluetooth connection possible without pairing?

Let's say I have an IoT device in public that needs to be paid to be used, and people will pay and unlock the device with a mobile app. Is it possible to do so over bluetooth/bluetooth low energy ...
The Puma's user avatar
  • 111
1 vote
0 answers
50 views

Should I make a custom bootloader? [closed]

I'm on a project where I'll use a BLE chip and I saw I can craft a custom bootloader. I don't think I'll need to make a custom one because it's just going to be a bridge to other chips (but aren't all ...
Jacques R's user avatar
  • 111
1 vote
2 answers
174 views

BLE client server communication

This is probably asked several times before, but my websearch skills can't really direct me to an adequate answer. I have a thingy, that takes commands from a mobile application with a request-...
zeller's user avatar
  • 113
2 votes
0 answers
196 views

ESP32 transmit data over BLE VS Wifi

I am working on a project where I have got an ESP32 device (Wifi & Bluetooth), which reads data from some sensors, such as temperature and soil moisture (outdoor environment). The data is then ...
Edge7's user avatar
  • 121
2 votes
0 answers
187 views

How to send data from BLE MCU to the Windows?

I have one nRF based 52840 device, which I am using to send the data by using BLE technology, my laptop has windows 10 and Bluetooth 4.0, which can detect the BLE but it cannot even connect to it. I ...
ZBT248's user avatar
  • 21
1 vote
0 answers
124 views

Integrating STM32 device with smart lock via BLE

I am using a Particle Boron to integrate with a Smart lock but I am not being able to do it. I'm using Particle's BLE interface to connect to Bluetooth and start sending messages to the lock, and a ...
Mauricio's user avatar
  • 111
1 vote
0 answers
361 views

Can I use ESP32 as a proxy to connect BLE device to AWS IoT cloud? [closed]

Reading AWS IoT documentation I see that the proxy could only be an Android or iOS device. To be more precise I’d like to publish from BLE (nRF52840) To AWS IoT using MQTT, but this device doesn’t ...
Jarson's user avatar
  • 11
4 votes
1 answer
78 views

BLE Heart rate monitor slower without internet

I am working on a project that uses a raspberry pi and a BLE heart rate monitor. I am using the built in Bluetooth on a raspberry pi zero w 1.1, running the latest raspbian buster, using the bluez ...
holofermes's user avatar
4 votes
1 answer
1k views

Bluetooth Direction Finding - do I understand it correctly?

I just read Bluetooth Direction Finding, added to the Bluetooth spec as part of Bluetooth 5.1 to allow devices to measure angle of arrival and angle of departure (AoA and AoD) to position devices ...
Mawg's user avatar
  • 3,110
1 vote
2 answers
444 views

How to encrypt sensor data in low-power wireless communication like LoRa, BLE, ...?

Wireless sensors communication have limitation in message size due to low power consumption. Assume that we have a heart rate sensor sending data via BLE, or a GPS data sending via LoRa to a receiver:...
Amir Pournasserian's user avatar
2 votes
0 answers
872 views

How to take data from multiple BLE devices into a central device simultaneously?

Firstly, I am very beginner in BLE domain. I have very little knowledge about it. I have Adafruit Feather 32u4 Bluefruit LE module. I want to do a project where multiple BLE peripheral devices ...
Prayuktibid's user avatar
2 votes
1 answer
66 views

RFID Specifications and Project Recommendations [closed]

I'm very new (one day) to the IoT world. I've got a specific project I want to tackle, as a intro to IoT, but I'm also open to general advice on getting started. In summary, I want to know if my ...
Zduff's user avatar
  • 129
1 vote
0 answers
216 views

How to connect Raspberry PI 3 Model B to BLE Motion Sensor

I'm trying to connect my PIR motion sensor using gatttool and is giving me this error: pi@raspberrypi:~ $ sudo gatttool -t random -b B8:7C6F:1A:D8:24 -I [B8:7C6F:1A:D8:24][LE]> connect Attempting ...
sirlancelot's user avatar
0 votes
0 answers
81 views

NINA B1 firmware update from 3.0.1.1 to 4.0.0

I try to update many time with no success. I am having error in loading the NINA-B11X-BOOT3.0.1.zip using UART. Any of you found a solution?
Daniele's user avatar
  • 101
2 votes
1 answer
161 views

How to set up the Timeslot API for AES-CCM peripheral use

I am using a nordic BLE SOC: nrf52 dk, along with s130 and sdk 14.2.0 I want to secure an advertised BLE packet with AES CCM encryption. The board contains a co-processor for AES calculation that is ...
Abyr's user avatar
  • 105
1 vote
0 answers
307 views

Push notifications to Mi Band 3

How can I push notifications to my Mi Band 3 without notifications showing up on my phone? It could be code, or could be an app for Windows or Android. I'm planning on writing an app using custom ...
Catalan Cabbage's user avatar
2 votes
0 answers
370 views

BLE advertising packet formation using nordic stack

I am working on A BLE beacon application to advertise data. I am using nordic nrf52 Development kit and nordic sdk s132. I am starting from the beacon exapmle provided by nordic. My question is how is ...
Abyr's user avatar
  • 105
2 votes
0 answers
339 views

CRC-24 calculation method validation

I am working on a BLE Beacon application and to generate the packet to be advertised I need to calculate a 24-bits CRC value out of the BLE header, source access and the payload. In the official ...
Abyr's user avatar
  • 105
1 vote
0 answers
61 views

How Different is a Car's Bluetooth from phone Bluetooth

I'm developing an application which makes use of a car's Bluetooth but I need to identify if a certain Bluetooth device is a car's Bluetooth. Is there a way to differentiate between Bluetooth devices ...
Mahi Tej Gvp's user avatar
3 votes
3 answers
6k views

How can I set the clock of my smart watch using my Windows 10 computer?

I bought a smart watch (MS1020). I would like to set the date and time but I do not have a smartphone or an android device on which to install the associated app (Yoho Sport). Is there a way to set ...
Sheldon's user avatar
  • 81
3 votes
0 answers
326 views

AWS Greengrass Raspberry Pi scanning for Bluetooth LE

I have a AWS Greengrass setup where I would like to have a Raspberry Pi constantly scanning for BLE devices and if anything is found publish a message via MQTT. I've gotten the script to work locally ...
Brian McCall's user avatar
5 votes
2 answers
1k views

Range of BLE and IEEE 802.15.4

In theory, IEEE 802.15.4 (ZigBee, Thread etc.) can achieve a much larger range than Bluetooth Low Energy (conventional, not coded PHY) due to its usually higher sensitivity (see for example here or ...
koalo's user avatar
  • 689
8 votes
2 answers
322 views

Suitable wireless technologies for high density industrial IoT

I have a requirement to design M2M communication devices for a factory which has 1000 nodes (machines) within 100m of each other. The devices will be wired to get power and will transmit a payload of ...
SamHW17's user avatar
  • 81
3 votes
1 answer
2k views

Distance calculation based on RSSI value

I want to calculate the RSSI value of a Bluetooth module (HC05) and from the derived RSSI value I want to calculate the distance of the surrounding devices. I'm using an Arduino Uno r3 as a controller ...
Arockia Jegan's user avatar
3 votes
3 answers
3k views

List of BLE hardware devices & what BLE services that they support

I'm looking a simple reference list that would shows me the supported BLE Services on each devices - for example; MIO Heart Rate Global -> (Heart Rate 0x180D) Archon Wireless Bike Meter -> (Cycling ...
Mannie's user avatar
  • 179
4 votes
0 answers
100 views

Devices wth Support for BLE Services 'Location and Speed' and 'Heartrate'

I need a BLE test device that supports at least Location and Navigation (0x2A67) 1 Heart Rate (0x180D) and optionally Health Thermometer (0x1809) Can anyone recommend one? Edit: I'm not looking '...
Mannie's user avatar
  • 179
7 votes
1 answer
89 views

Rapid pairing of Bluetooth low energy interface

I'm looking at making a remote control for a custom IoT device using Bluetooth low energy (BLE) and I want the battery in the remote to last a very long time (primary battery, non rechargeable) so I ...
Josh Wales's user avatar
7 votes
3 answers
114 views

What would be the best way of authenticating users without password or username?

In our project, there are over 200 dummy users who are not very capable of using mobile technologies or computers comfortly. The project is essentially a MRP & Production Planning solution with ...
paroxit's user avatar
  • 171
3 votes
1 answer
239 views

Unable to receive response to AT commands after switching from data mode to command mode

I am having issues with receiving the response to the AT commands from the NINA after switching from data mode to back to command mode. I used the "ATS2?" command to check the escape character and ...
Vinay Divakar's user avatar
7 votes
2 answers
285 views

Is there an IoT device which has Bluetooth, GPS, a USB port and which can support a module for an alarm?

I'm looking for an IoT device which has Bluetooth, GPS, a USB port and which can support a module for an alarm. The end product is a wearable device therefore the device should be small. It should be ...
Muiz Uvais's user avatar
7 votes
1 answer
119 views

Maximum Bluetooth LE devices near each other without interference

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 using ...
CuriousGuy's user avatar
9 votes
3 answers
4k views

Setting a device clock with BLE

I'd like to build a device that obtains the local time from a phone or laptop via BLE. My ideal interaction flow would be: push a "set time" button on the device to make it start advertising open ...
jmw's user avatar
  • 91
7 votes
1 answer
124 views

Protocol for over 300 metres and minimum of 20 kbytes datarate?

We are trying to choose the most suitable connection protocol for wearable devices, with the following constraints: 300 - 500 devices will simultaneously connect About 1 km2 site area—coverage is ...
dicobraz's user avatar
3 votes
0 answers
353 views

ESP32 & Bluetooth

I'm currently looking into how to set up a sense network made from ESP32s to track BLE tokens in an area, but I'm stuck at the first step... Getting Bluetooth & device listing to work on the ESP32,...
Meki's user avatar
  • 139
7 votes
0 answers
1k views

Can a Bluetooth tag (iOS and Android) send a push notification without the device being connected to the internet?

I have several Bluetooth tags, model "Onyx Beacon One". They can be controlled via the company's CMS. I can also switch them between Eddystone UID&URL and iBeacon. I can simply place two of them ...
RubbelDieKatz's user avatar
7 votes
1 answer
79 views

Looking for direction to find a specific hardware

I am struggling finding a specific hardware, here is what I need : Bluetooth Low Energy Beacon good range Button on it to send a signal to my iOS/Android app Possibility to switch off/on (not ...
xGoPox's user avatar
  • 171
18 votes
2 answers
11k views

Is MQTT protocol appropriate for transmitting sensor readings over BLE?

Assume that there are numerous weak sensors (e.g., Arduino level devices) which rely on BLE as means of communication and that these devices are connected to a more powerful gateway (e.g., Raspberry ...
dr.doom's user avatar
  • 281
7 votes
0 answers
252 views

BLE only partially connected in iPhone? [closed]

I am trying to use BLE to send strings of data from a CSR8675 chip to an iPhone I am having problems pairing the chip with the iPhone for BLE communication, and need some ideas on how to proceed ...
user17915's user avatar
  • 415
5 votes
1 answer
6k views

How do the AirPods communicate with the phone?

By reading the iFixit Teardown, one can realize that the AirPods use the W1 chip for wireless communications. Since both Airpods are wireless, there are questions still unanswered. Do both Airpods ...
toniotgz's user avatar
8 votes
1 answer
515 views

Optimal Wireless Technology for High Data Rate & Low Latency IoT Application

I am planning to use the BNO055 Absolute Orientation Sensor for collecting the accelerometer, magnetometer and gyroscopic measurements for an application. As of now I want the data to be sent at a ...
Shan-Desai's user avatar
  • 1,558
7 votes
1 answer
268 views

How does transmit power influence the accuracy of beacon sensor readings?

I have some Bluvision Beeks beacons equipped with temperature sensors. I can adjust their transmit powers. I am wondering if setting a higher transmit power for a particular beacon will result in a ...
Undertherainbow's user avatar