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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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1answer
733 views

KIndly advise if Class 1 BLE 4.0 -20dBm input or/and output sensitivity?

i am building a class 1 BLE 4.0 100m but not sure if the -20dBm specfication is an output or receiving standard? Please any one with this information. Regards!
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2answers
974 views

Why would uart connection only work after disconnecting power?

I am using a Microchip Bluetooth Pictail and a Sparkfun 3.3V USB-to-UART and a Arduino Uno (just for power-5V,gnd and 1 active high signal connected to 3.3V). When I power the PicTail it outputs "CMD"...
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1answer
165 views

nRF8001 DevKit usage with FPGA and Embedded Linux

I would like to develop an application with Nordic's nRF8001 DevKit. The master emulator of this kit is an USB Dongle and it is originally meant for PC connection. My final goal for the project is to ...
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1answer
2k views

Sending multiple channels with bluetooth

I have ordered my HC-05 BT modules. My question is this: Is it possible to send multiple channels over bluetooth. For example, stereo sound has two channels. I think i have seen people do this but i'm ...
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1answer
809 views

How can I render my 2.4GHz antenna directional?

With barely no knowledge in this field, I would like to render my antenna used with Bluetooth BLE devices more directional. I tried to shield the antenna with different kind of metals with no luck. ...
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1answer
1k views

Bluetooth Low Energy Proximity sensing less than 2 feet?

I am working on a project where I need a TX and RX to be able to sense if the modules are within 2 feet of one another. Ideally, we would like to only utilize BTLE 4.0 for both devices since power ...
4
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1answer
187 views

We have 2 variants of device which differ only by battery. Shall we pass FCC separate FCC certification for every of them?

We developed a BT4LE device which is being shipped in two variants. They are the same except for battery variant. Is it possible for us to pass one FCC certification so that it is valid for both ...
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1answer
723 views

What bluetooth chip / type should be used for a remote control car? [closed]

I am building a small remote control car to be controlled by bluetooth (iOS and Android). I am having a custom circuit board built, and I want to know what bluetooth chip I should get. I would like ...
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1answer
168 views

Retrieving data recorded by an IoT sensor

If an IoT object records data (accelerometer, gyroscope, ...) in memory, what would be the smartest way to retrieve these data after, let's say, 2-3 days? Store in JSON format on an SD Card? Store in ...
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0answers
336 views

Using nRF8001 as a master with an FPGA

I would like to use Nordic's nRF8001 modules in Master and Slave modes and also would like to connect it with Spartan-3E FPGAs using SPI. I am considering buying the nRF8001 DevKit. I believe it is ...
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2answers
4k views

Is Bluetooth Low Energy (aka Bluetooth Smart) Full Duplex?

Can I transmit and receive at the same time? Does this vary by silicon vendors?
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2answers
347 views

Ball Tracking, possibly with BLE

I'd like to track a ball during a game using wristbands on players and a chip in the ball. I'd like the type of ranging given by Bluetooth low energy (immediate, near, mid, far) so that I can tell ...
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1answer
1k views

What are the resource requirements (RAM, flash) of the latest nordic bluetooth smart (formerly BLE) stack?

I want to understand how much RAM and flash I have available for my own program memory and program space after I incorporate the overhead of bluetooth communication when using an nrf51822. https://...
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1answer
256 views

How can I modify the Chipolo circuit to support earlier versions of Android?

I have been trying to find out more of the circuit design of Chipolo and would like to modify it so that it can support earlier Android versions because it can only support Android running version 4.3 ...
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1answer
1k views

Bluegiga BGScript blinkylight example

I'm trying to code BGScript but I have some questions. Can you help me? I have DKBLE112 which is Development Kit of the BLE112 module built around the CC254x, an 8051 derivative with an on-chip BLE ...
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1answer
1k views

Bluegiga BGScript Accelerator sample. I want to understand the example code

I started BGScript few days ago. I have many questions about BGScript. Any help will be appreciated. Thanks! *My goal is advertising with accelerator data via BluetoothLE. I am going to use ADXL345 ...
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2answers
136 views

Most energy efficient way to detect motion

I am hacking together a prototype wrist band, with BLE as the main component. I'd like the device to detect a bump or a wave. What would be the most energy efficient way to do so? I'd like the ...
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3answers
6k views

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 (...
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1answer
852 views

Bluetooth low energy communication

I was wondering if it is possible to communicate between 2 BLE devices when one is placed inside the car and another placed outside the car. Can BLE communicate in such a scenario? For example, I ...
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3answers
331 views

Using Bluetooth 4.0/LE verses RF

I am asking this question in hopes to get a solid answer from anyone who has direct experience dealing with the most recent RF as well as Bluetooth 4.0/LE developments. What I am essentially trying ...
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0answers
1k views

Bluetooth low energy: effect of slave latency on power consumption

Slave latency is meant to allow a bluetooth le slave to skip a certain number of connection intervals before actually establishing a connection event with the master. In principal, this seems like it ...
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4answers
1k views

minimal ARM (cortex m0) board

First: I'm not a professional. I just want to know what is possible and if i'm on the right track. Second: I want a little microcontroller which just measures (for example) the temperature and send ...
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2answers
838 views

Bluetooth module (BLE112) USART: do I need to use its own microcontroller?

I am looking into the this module. All I need it for in my design is USART connection to my MCU (TX/RX connections). I don't care for the internal microcontroller (yet). My question: if I connect, ...
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1answer
341 views

Arduino Bluetooth BLE boards function as iBeacon emitters, or receivers?

I have just purchased the estimate iBeacon developer kit and am doing research on iBeacons, building demo apps using Adobe AIR with native extensions. I was curious if any of the many Bluetooth BLE ...
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1answer
585 views

Bluetooth project | Bluetooth transmitter connection to android mobile [closed]

Description: I want to create a Bluetooth transmitter that will pair with my android phone. I will send a ping(alert kind of notification) from my Bluetooth transmitter device(on a button press), and ...
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1answer
2k views

Can two BLE devices communicate?

I researched that starting from Bluetooth v4.1 a BLE device can be either a master or a slave. I was curious if anyone has tried it? And how to go about it. Also I am new to hardware and would like ...
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2answers
945 views

Can bluetooth LE detect a touch using proximity?

How accurate is the proximity feature in BLE, can I detect if two BLE are touched tougether?
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2answers
140 views

Likely to use more power - phone screen or bluetooth le?

Just as a theoretical guesstimate, would a phone screen likely to be more of a battery drain than a bluetooth le connection? Of course this is going to vary on the amount of data being sent the ...
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1answer
3k views

Programmable Bluetooth transmitter

As I develop my R&D project I decided to add bluetooth to the mix... In the first stage I decided to use my own iMac as a transmitter and my iPhone as the receiver, and it worked great... As I ...
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1answer
1k views

Detect presence of Passive HF/LF RFID TAG with BT 4.0 (NFC not supported) [closed]

Trying to understand if with current capabilities of Bluetooth 4.0 / Smart / BLE, is it possible to detect a passive RFID TAG, within a very short range (less than 5cm). New phones both Android/iOS ...
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1answer
166 views

Bluetooth low energy digital thermometer approvals

We have developed a bluetooth low energy digital thermometer and need to know what certification processes we need to go through to be able to sell it in the USA. I am happy about the EU and the UK ...
2
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1answer
150 views

Best technology to have a specific person's proximity in a room turn on a light outside the room

I need help deciding which technology to use so that, when a specific person (1 out of 6) walks into a room, their specific ID is recognized and the corresponding colored light is illuminated outside ...
2
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2answers
15k views

Can an iphone/android cell phone communicate with RFID?

Is it possible for a cell phone to communicate with an RFID chip? I'm looking for a low-powered solution to turn a device on/off wirelessly, using a cell phone. Example: phone sends signal to RFID ...
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1answer
2k views

Bluetooth receiver as an on/off switch

Is it possibly to use a Bluetooth receiver as an on/off switch in a circuit board? Ideally, I would set the Bluetooth receiver into a low energy/sleep mode and use it simply as an on/off switch on a ...
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1answer
926 views

Bluegiga BLE112: Serial Debugging

It's my first time to post my question to this electrical engineering. Anyway, I'm trying to make a BLE gadget using a BLE112-A BlueGiga. I could update a firmware of BLE112 but I'm stuck with ...
2
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2answers
476 views

Bluetooth Low Energy - Smart vs Smart Ready device

After going through this wiki on BLE, I understood that BLE SmartReady devices are dual mode devices (BT as well as BLE) whereas Smart devices are single mode devices (only BLE). Few of my friends ...
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0answers
264 views

Build or Buy Bluetooth 4.0 BLE Tag [closed]

I am planning to create a mobile application that scans a NFC tag and performs an action based on the unique scan (tap). Because Apple iPhone do not support NFC I am forced to look for an alternate ...
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2answers
166 views

Looking for a transistor to power a load with PWM from a Bluetooth module

My project is a heating load power with a PWM from a Bluetooth module (BLE113). I managed to do the PWM I want with this module and now I would like to connect the load. The module give a PWM with 3....
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1answer
632 views

Prototyping for Bluetooth accelerometer

I'm a software developer looking to prototype an application that requires input from a 3-axis accelerometer, ideally via Bluetooth LE. Current specs on the accelerometer are +/-50G sensing range ...
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1answer
414 views

Designing a bluetooth 4 low energy device - what needs to be taken into account for future FCC and CE certifications

We are designing a BT4LE device based on Nordic chipset with chip antenna. The question is how can we understand is it required to put the chipset into an RF shield or not? I've seen some BT4LE ...
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2answers
1k views

BLE113 Bluetooth 4.0 module with CR2025 3v battery power supply

A question regarding the power supply of a BLE113 Bluetooth 4.0 module: I am attempting to order several bluetooth modules, but the main concern is the power supply. Since I am new in the field of all ...
2
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0answers
237 views

What components do I need to wirelessly transmit a small signal via Bluetooth? [closed]

So I'm doing a project trying to create a wireless Electrocardiogram (ECG or EKG) system. I built the hardware, connected it to a human subject, and it works perfectly - you can see the heartbeat ...
10
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3answers
20k views

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 ...
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2answers
4k views

Does Bluetooth LE stack supports A2DP profile?

Does Bluetooth LE stack supports A2DP profile (audio steaming)? or if there is any dual mode stack which I could use in combination with BLE and classic stack. Also any information on the hardware ...
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1answer
274 views

change software configuration of a BLE device with a smartphone app

Would it be possible to change the software configuration of an nRF51822 over the air from an iOS application for instance ? I'm interested in being able to change the UUID, the MINOR and MAJOR and ...
2
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2answers
339 views

Will most IC's operate at 100C

I'm thinking about making a self contained Bluetooth LE temperature sensor. I'd like it to be usable up to the boiling point of water. All the BTLE device seem to be rated up to 85C. Do you think they ...
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1answer
407 views

Bluegiga BLE112-A: able to program, but unable run see

I tried to get Support from Bluegiga directly, but I didn't get an answer (despite the fact that their Zendesk is nearly unusable): I'm using a BLE112-A on our board: I've been able to flash my ...
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1answer
3k views

How to discover a custom Bluetooth LE device

I have a custom circuit board which is using a Bluetooth LE chip from Nordic Semiconductor. I'll be talking to this device with an iOS app and am new to BTLE and somewhat confused by the whole ...
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1answer
378 views

Trying to figure out the distance my computer is from my Bluetooth peripheral via RSSI. Is it possible?

I'm having a great deal of trouble figuring it out. I know it's far from exact, but I would like to have a reasonable estimate in meters. Right now my device is reporting back to my the RSSI value ...
3
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2answers
2k views

Counting number of bluetooth 4.0 (BLE) devices near me?

Does bluetooth allow you to discover devices around you that are simply on but aren't in any discovery state? I am not trying to pair with all these devices but merely count the number around me and ...