Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [bluetooth-low-energy]

Bluetooth Low Energy ("BLE") is a radio standard for wireless personal area networks, introduced in 2006. Bluetooth Low Energy is a subset of Bluetooth v4.0.

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Streaming video using BLE or classic Bluetooth 4.0?

BLE only has a data payload of 100Kbps so I was wondering if it is possible to stream a live video using Bluetooth Low Energy? Classic Bluetooth 4.0 has a data payload of 2Mbps which makes it easier to transmit the video but I am more concern about…
Electronic Curious
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What Bluetooth 4.0 devices and radios are available?

Bluetooth 4.0 is the latest specification to be adopted by the Bluetooth cabal, which notably adds Bluetooth low energy into the mix, which is designed to allow radios that sip battery like 802.15.4 ("ZigBee") to directly connect to consumer…
Nick T
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BLE Scan interval and window

With Bluetooth Low Energy, you specify a scan window (how long to scan) and interval (how long to wait between scans). Would there be any difference between scanning for 10 ms every 100 ms, or scanning for 1 sec every 10 sec? Seems like the chance…
Maestro
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Bluetooth dual mode (BR/EDR + LE)

I was wondering how does some Bluetooth radio chipsets achieve the dual mode (BR/EDR + LE) ? How do they manage to distinguish between two frames of different modes? Any help or document explaning this will be precious to me. Thank you !
Safe Lewit
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Bluetooth 4.0 vs. Bluetooth LE, is there a difference?

Is there a difference between Bluetooth LE and Bluetooth 4.0? If so what are the differences? If I'm buying devices (such as a TI SensorTag) and not the planning to use Bluetooth 2.x or Classic, should I care? Also, is the preferred abbreviation…
hotpaw2
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Bluetooth low energy Power Consumption in Sleep state

I constantly read about the low power consumption of BLE and websites stating Power consumption: Since a Bluetooth low energy device is in sleep mode most of the time - the maximum/peak current draw is only 15 mA and the average current draw is of…
Matt
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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 opposite way. If speed and range is better, then power…
Barış Velioğlu
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Can I run custom firmware on a pre-certified RF module without needing to redo full FCC certification?

I need BLE connectivity in a product, so to save costs on FCC certification, Bluetooth SIG membership, etc. it will use a pre-certified module for this purpose. Usually such modules work in one or multiple of the following ways: Controlled through…
svens
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Beacons versus Sensor Nodes

What is the difference between a beacon node and a wireless sensor node? In addition to positioning information, beacons can provide temperature measurements. In that case what would be the difference between the beacon and a wireless sensor with…
Undertherainbow
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How to get started with Bluetooth 4.0 (BLE / Low Energy)

I want to get started with Bluetooth 4.0 / Bluetooth Low Energy / BLE. I know it's different from a normal Bluetooth. Currently I'm using BlueSmirf Bluetooth 2.1 module, UART interface and SPP profile. I have a simple operation sending a string to…
mlam
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BLE Transmitter for Production

We would like to add a BLE transmitter to our board so that it can serve as an iBeacon (and whatever the non-Apple equivalent is known as). It seems like the engineers at Estimote and Stick n Find decided to settle with the NRF51822, which seems to…
rith87
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Bluetooth Low Energy general questions

I'm facing some problems understanding how Bluetooth LE works. First: How is a connection established? Peripheral (e.g. sensor) sends advertisements Central (e.g. tablet) has to scan actively (generally it does not scan) Central discovers…
matcauthon
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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 long and I don't want to manually do it if I have…
luckyging3r
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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 at 3mA every 500ms. We choose to put 3 C…
Puck
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Reduce BT power consumption by dis- and reconnecting

This is a question which comes from a programmers perspective (so might be SO, please migrate then) but with an EE background. I am trying to programmatically reduce the bluetooth power consumption between a cellphone (Blackberry Z10 featuring…
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