Discover the Future of Audio: Bluetooth LE on nRF5340 Audio DK! 

Yes. That should be possible with LE Audio. I recommend downloading the free LE Audio book and reading through it. It will give you a much more in depth understanding of the LE Audio profiles: www.bluetooth.com/bluetooth-resources/le-audio-book/

Keep in mind, (I believe) the HC-05 is a Bluetooth Classic (BR/EDR) device not BLE.

Can you help me out please?

Fahad, a low-power “receiver” (which I suspect you mean peripheral) in Bluetooth Low Energy has to wake up at specific times when connected to a central. These are called connection events. Keep in mind the communication in a Bluetooth LE connection is bidirectional so there’s no specific transmitter vs receiver. The key is in the low amount of data being transferred and the efficient way of handling the data to allow the peripheral to go to turn off the radio and go to sleep as soon as possible. That’s how they can achieve really long battery life. There’s also a parameter called Peripheral Latency which allows the peripheral to skip connection events, if it does not have any data, without the central considering the connection lost.

Hi Fahad. I was also struggling with this question. I initially thought a receiver would need to be powered on the entire time to listen for random transmissions but in the case for connected BT LE devices this isn't true. I'm still new to this and learning (someone can correct me if I am wrong) but, from what I understand, the reason a BT LE receiver can be very power efficient is because it is also sleeping most of the time. Let's assume you have a central/receiver device and a peripheral/sender device. In my case I'm using the peripheral to send temperature sensor data to the central device. Once a connection is made between the central and peripheral, the central synchronises a connection interval timer with the peripheral (you can specify the connection interval duration). The 2 devices then power down their radios until the next connection interval period is reached at which point both devices turn their radios on again and the central checks to see if the peripheral has any new data. Once the new data has been transmitted they both power down again until the next connection interval timer has been reached. I think the maximum connection interval time is 4 seconds. Nordic has a great power profiler which you can use to determine the power usage of their chips depending on the various usage scenarios. devzone.nordicsemi.com/power/w/opp/2/online-power-profiler-for-bluetooth-le Assuming a 4s connection interval with a connected central device, you can get as low a 4µA average current!

I believe you can create a private ticket at devzone.nordicsemi.com and ask for more information on that. I think that will connect you with the local sales rep.

Yes I do agree. And it wasn’t a straightforward process for me either. I’ll look it up and get back to you. I may have to add the steps to the companion blog post as well.

So I followed the following instructions for setting up the nRF Connect SDK repo: developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/gs_installing.html And then followed the steps laid out here to specifically set up the LE Audio related configuration: developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/applications/nrf5340_audio/README.html#configuration I may have run into a couple of issues along the way but I don’t quite remember. So if you do, let me know and I will do my best to help.

It doesn't look like that's possible at the moment. It seems the only options are USB or I2S

Hi Daniel, According to some articles online, the phones will need to include newer Qualcomm Snapdragon chipsets to support LE Audio (in addition to running on a Bluetooth 5.2 compliant chipset). www.androidpolice.com/android-13-is-set-to-drastically-improve-bluetooth-audio-streaming/ www.qualcomm.com/products/features/bluetooth-le-audio

Only ones that support LE Audio will be able to do that

Then earphone with BT 5.3 will support broadcast? Or is it different from Audio LE ?

@@taehyungkim8103 LE Audio requires at least v 5.2 but the features required (mainly Isochronous channels) are optional features in the specification. So, many Bluetooth devices will be 5.3 or 5.2 compliant but it doesn’t necessarily mean they support LE Audio. They also have to be an LE device and not BR/EDR (Bluetooth Classic). For the broadcast mode specifically, the Bluetooth SIG introduced a new brand called Auracast which should make it easier to identify which devices support the broadcast feature or not (whether it’s a source likes TV or a sink like a pair of headphones).

The first edition is available for free: www.novelbits.io/introduction-to-bluetooth-low-energy-book