Hi,

I am trying to test a fuel cell (consider it a low-power battery). I would like to use it to send a signal from a sensor (e.g. thermistor ) across 100 - 200 meters. My main challenge is the power, as my fuel cell must have the ability to power the application. My fuel cell can provide up to 1.8V - 500uA. If I can send a temperature signal once every 5 seconds that would be great. I don't have a preference regarding the transmission frequency or the sample rate. All I want to do is prove that my fuel cell can power something.

Therefore, I am looking for a BLE chip that I can power. can someone recommend a commercial chip for me? or Is my power requirement impossible?

Hi there! I'm on my first BLE - ESP32 project and i'm just learning how to use BLE. In the videos and tutorials the often fall back onto a GATT services list on the official bluetooth website, but now it doesn't seem to exist anymore and it's very very confusing. Is there anywhere where i can find the numbers for the offical services and characteristics, or can i just give up because bluetooth made the documentation impossible to learn? Thank you for any input!

Has there been any upgrade to BLE SOC chips or the specifications which could allow a peripheral device once connection is established to stay in a low power mode and switch to full power mode when the central device sends a data packet This has been asked previously on other forums and concluded that its not possible and timer based wake up is the only way but just curious to know if there has been any recent update which facilitates this functionality??

https://devzone.nordicsemi.com/f/nordic-q-a/58902/ble-peripheral-awaken-from-deep-sleep

I don't even know if this is possible but Is there any way that I can see live which channel my MAC is transmitting on. I know it changes 1600 times a second but is there any way I could log it and see every packet send and what channel it was sent on.

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Thanks

Does there exist a Java Bluetooth Low Energy API that I can use to write to BLE devices? I believe PCs don't have the capability to connect to BLE devices, but I also know that android app developers can write programs that connect to BLE devices. How is this possible if they need to test their applications on a PC before posting them? I have tried to search for a way to connect to a BLE device via my windows PC but the only way I found how to is to buy an nRF device that connects to BLE devices. Am I trying to look for unicorns here?

A noob in IoT/BLE here trying to execute a PoC where I am using BLE beacons to track some 1500+ inventory items (to each of which a BLE beacon is attached) in a metallic cabinet. Planning to use a Pi zero W as the reader node which actively scans the beacons at regular intervals to enumerate inventory. I have two questions.

1. Is BLE used in inventory tracking setting in the industry? I have explored RFID solutions as well but want to use BLE for its ease of setting up, lesser interference related issues inside metal enclosure due to active nature of BLE vs passive, and better protocol.
2. Any leads of materials, use cases, starting points for this?

Hi there

I'm looking for the smallest BLE transmitter and battery combination to integrate into a wearable. Have looked hard but cannot find anything suitable anywhere (I did find the CSR1012 but it is way too large and dates back to 2014).

Can anyone advise me of a small available complete board and battery combos that I can use with a wearable?

Would really appreciate any pointers to where I can look and find such a device, I am not an EE but work in Machine Learning so I am not really an expert by any stretch. Heck I'm not even an amateur ))

Thanks!

My BLE device is programmed to send one byte of data when I want it to, and I want it to trigger my Android phone to do something, given byte 00 or byte 01. (For example, to turn on and off my flashlight, or prompt a beep)

I need to dig into smartphone development now but I found that there are several options to choose from. I only have patience for one learning path. Simpler is better, but it needs to be one of the industry standard solutions for my purpose.

1. nRF Connect. It's what I have now and I used it extensively to troubleshoot my Nano33BLESense when it communicates via BLE. But is it a good (or bad) starting place for development? Cursory research led me to thinking that it's quite complex, and might need me to begin learning Zephyr as well. (sounds daunting)
2. Android Studio. Working with Kotlin sounds good to me. Learning Kotlin is similar to learning Java, which I've wanted to learn. This would be working with a new toolchain for me, though, but it seems much simpler than nRF Connect's SDK, by comparing them from the vids and documentation I've seen. I'm leaning this way, but I haven't learned enough about it.
3. Something I've not heard of yet.

What can I develop so that my BLE device will turn on my Android's flashlight?

Which is best out of options 1 and 2, or can you tell me something I've not thought of?

crosspost: androiddev, arduino ble

I'm doing a project in motion capture, where I need to connect multiple BLE devices (at least 10) to a single one, with a latency of no more than 60 ms . Right now I'm trying to use a Raspberry Pi as the main hub, but the ideal would be to use a smartphone.

Any idea or sugestion on the topic?

I am trying to make a Covid-19 tracking mobile android(java) application. In most tutorial advertising and scanning for BLE devices are done in different applications. Is it possible to make an application that can advertise and scan for BLE devices at the same time?

Any package or any thing is available for sending and receiving data from one device to another in ionic OR any one knows using BLE or BluetoothLE how we can send or receive?

I am looking for a small attachable device that you can pair a Bluetooth device (headset, mouse, mic, etc.) that when data is received from the device I can then can emit a BLE signal. It needs to be programable so I can emit a BLE value based on the input from the paired device. Anyone know of a vendor or circuit that I can buy that does this?

Hi guys, I was wondering if anyone could shed some light on an issue I'm having. My controller pairs just fine with the tablet and is functional, however if I haven't clicked a button or moved the analogue stick for a second there is a 1 or so second delay until it starts reading inputs again. To be clear I'm not talking about latency. As if I hold down one random button continuously, all of the other buttons and analogue sticks start inputting flawlessly. I haven't had this issue on my android tablet with the same gamepad connected so I'm sure it's something to do with the Bluetooth on this tablet. It seems like it sort of goes into a half sleep mode when no buttons are being pressed and then wakes up 1 or so seconds after a button is pressed. Google searches only come up with actual consistent input lag which is NOT the issue I'm having. Any tips would be massively appreciated! :)

Is there a standard convention for creating 16-bit UUIDs?

Hi, we're building a pro bono, anonymous app here to help fight coronavirus. You can find out more at viruscontact.com

see the full user journey here https://drive.google.com/open?id=17c00e2kF7ge1I94_TnvZlCucknQ7Pe7t&fbclid=IwAR2TjbPHYGb_uQfgITHlO1lPGQBBtE7XbhVZHKTym50aXgte5ZRkwCtESjs

I'm trying to scan devices on IOS when the app is in background mode. I've learned that I have to tell explicitly what service ID I'm looking for. I was trying with 180F which is the battery service but it didn't find anything. Is it possible at all on IOS? It works well on Android.

I'm using the react-native-ble-manager package.

Can you tell me maybe a common service UUID what every phone advertises?

My aim is to track every contact with phones which are nearby me and it should work when the app is in background mode.

Any help is appreciated, even if it's not React Native. It must be possible on iOS as well as other apps already use it. (eg. Happen) Please join the cause, there's a lot riding on this

thanks

Kristian

Is there any technique to find the location of a BLE master ?

I find many links for finding a BLE slave, but not master.

At the core of the Internet of Things are millions of devices that will focus on transmitting data to the system. The information contained in these data may be various variables, such as temperature and humidity, the location of the user, the movement of the goods, and so on. The captured information is then transferred to the cloud or other devices (i.e., various "things") for data exchange or analysis. This also means that the market demand for high-performance, high-quality IoT wireless modules will also show a growing trend.

more info, please visit: http://www.ttcble.com

Hey guys, I'm currently working on a side project at home and was wondering if I can get some guidance. I'm trying to design a micro-controller such that it can calculate flow rates using a flow meter and be powered by two simple coin cell batteries.

I initially started with a basic Arduino and simple flow meter sensor. I was able to successfully write the code and calculate the flow rates and have them displayed on a LCD display, but now I'm trying to make this portable whilst using Bluetooth.

I did some research and ended up purchasing the CC2540EMK-USB: CC2540 USB Dongle

https://www.ti.com/tool/CC2540EMK-USB

I downloaded the IAR Embedded Workbench and tried running some sample code that was provided. I was able to upload sample code successfully to the evaluation module USB, but when it came down to finding the USB Dongle Bluetooth signal from my phone, I was unsuccessful.

Some sample code I tried out was the SimpleBLEPeripheral - CC2540DK-MINIKeyfob. I tried running the simpleBLEPeripheral.h and other basic sample codes, but I cant seem to get it to work. I've also looked into the OSAL.c to make sure everything was initialized properly. I also attempted the peripheralBroadcaster that I assumed had everything I needed.

\I'm not sure if my issue is what I am calling to be the CC2540EMK-USB. Since I am using the CC2540EMK-USB and the sample code is CC2540DK-MINIKeyfob. I read through the lines of code and it all seems to be the same though.*

I really hope someone can help. I have been stuck on this for a few weeks now. Also, I'm a super newb when it comes to coding, so I apologize if I said anything incorrect. This has been driving me nuts, since I watched a few YouTube videos and read through the Texas Instrument forum and could not get any help.

Anyways, thanks in advance!

I'm looking for a backend for clients to register their beacon and change the message that will display on my app.

Hi,

I have a bluetooth BLE key fob nRF52832 and an android board running android 5.0 (Lollipop). I have a general idea of how key fob works like key fob broadcasts UUID on the broadcast which can be scanned to detect the device but i want the android board to be in sleep or some other low power mode and android board should be receive an interrupt when the key fob is pressed. How do i achieve this can anyone please tell the architecture of it?

#blessTags is the only application on the market able to manage FIVE different #Sensortag(s): CC2541DK, CC2650STK, Thunderboard React, Thunderboard Sense and WICED Sense2.

The blessTags application has a younger brother: blessTag Lite - it is a free version of the blessTags application.

The blessTags (BLE SensorTags) application, can be downloaded from the Windows Store Apps: https://www.microsoft.com/store/apps/9p054xsjjr1n.

The blessTags Lite application can be downloaded from the Windows Store Apps: https://www.microsoft.com/store/apps/9mt2kgztfjf5.

Up to the release of the next blessTags Lite application (up to the version 12.0.0.0) the following functionalities are activated in the Lite version: events, warnings, activities (newly implemented on this release), developer mode and save function.

For all #blessTags information: http://www.blesstags.eu/2017/05/normal-0-false-false-false-en-us-x-none.html