Questions tagged [bluetooth-low-energy]
For questions related to the use of a Bluetooth Low Energy (BLE) wireless personal area network in IoT devices.
52
questions
0
votes
0
answers
32
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 ...
0
votes
0
answers
22
views
How to advertize BLE custom data in Linux
I'm learning BLE and slightly got stuck with advertisements. I'm trying to advertise custom data representing an iBeacon with the commands below:
bluetoothctl
menu advertise
manufacturer 0x4C 0x00 ...
- 101
0
votes
0
answers
14
views
Why a requested/sniffed BLE characteristic handle mismatch on Linux?
I'm learning BLE and trying to sniff packets just to understand how communication happens. I do this with Wireshark on Linux and sniff traffic between the Linux machine and a BLE-powered wristband.
I ...
- 101
0
votes
0
answers
50
views
Can you reconfigure advertising packet during advertising BLE on ESP32
I'm trying to make a simple environmental sensing module on the ESP32 with ESP-IDF. I want to use BLE with gap only. I'm thinking of sending all the received data with the Advertising packets but ...
0
votes
2
answers
81
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 ...
- 101
0
votes
1
answer
28
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 ...
0
votes
0
answers
64
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 ...
- 101
0
votes
0
answers
170
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 ...
1
vote
1
answer
95
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 ...
- 111
1
vote
0
answers
48
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 ...
- 111
1
vote
2
answers
116
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-...
- 113
2
votes
0
answers
146
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 ...
- 121
2
votes
0
answers
162
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 ...
- 21
1
vote
0
answers
114
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 ...
- 111
1
vote
0
answers
354
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 ...
- 11
4
votes
1
answer
77
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 ...
- 41
4
votes
1
answer
804
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 ...
1
vote
2
answers
395
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:...
2
votes
0
answers
835
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 ...
- 121
2
votes
1
answer
62
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 ...
- 129
1
vote
0
answers
206
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 ...
- 21
0
votes
0
answers
77
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?
- 101
2
votes
1
answer
153
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 ...
- 105
1
vote
0
answers
304
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 ...
2
votes
0
answers
343
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 ...
- 105
2
votes
0
answers
298
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 ...
- 105
1
vote
0
answers
59
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 ...
- 111
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 ...
- 81
2
votes
0
answers
317
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 ...
- 121
5
votes
2
answers
997
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 ...
- 659
8
votes
2
answers
311
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 ...
- 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 ...
- 166
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 ...
- 179
4
votes
0
answers
98
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 '...
- 179
7
votes
1
answer
88
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 ...
- 93
7
votes
3
answers
113
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 ...
- 171
3
votes
1
answer
224
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 ...
- 171
6
votes
2
answers
282
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 ...
- 61
6
votes
1
answer
115
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 ...
- 161
7
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 ...
- 71
6
votes
1
answer
117
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 ...
- 89
2
votes
0
answers
349
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,...
- 129
6
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 ...
- 299
6
votes
1
answer
77
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 ...
- 161
17
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 ...
- 271
6
votes
0
answers
248
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 ...
- 385
5
votes
1
answer
5k
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 ...
- 61
8
votes
1
answer
513
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 ...
- 1,458
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 ...
- 173
13
votes
3
answers
1k
views
Speed limitations on moving sensors
After I watched this video of the docking scene in Interstellar sweded using a light bulb and a fan, I was thinking:
Are there speed limitations with moving sensors, such as measuring a spinning ...
- 3,676