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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.

3
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2answers
105 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 ...
7
votes
2answers
168 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 ...
3
votes
1answer
48 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 ...
3
votes
3answers
97 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 ...
4
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0answers
48 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 '...
7
votes
1answer
46 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 ...
7
votes
3answers
89 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 ...
3
votes
1answer
59 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 ...
7
votes
2answers
93 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 ...
6
votes
1answer
70 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 ...
7
votes
3answers
336 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 ...
6
votes
1answer
92 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 ...
2
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0answers
275 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,...
6
votes
0answers
513 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 ...
6
votes
1answer
64 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 ...
11
votes
2answers
3k 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 ...
6
votes
0answers
181 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 ...
3
votes
1answer
672 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 ...
6
votes
1answer
356 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 ...
8
votes
1answer
191 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 ...
11
votes
3answers
727 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 ...
11
votes
4answers
924 views

Is Bluetooth a good enough protocol for “lost my keys” beacons?

Bluetooth beacons for localizing lost objects are beginning to spread. You can locate them using an app on your smartphone (yes, and create an account, share on facebook your objects, ...) with a ...
14
votes
2answers
222 views

Are there any Bluetooth LE light dimmers with open APIs?

Are there any smart light switches/dimmers that support Bluetooth Low Energy and have an open or accessible APIs? I want to gradually replace all dumb switches in my house with smart switches, but ...