Receiving signals via BLE without using nRF connect

[Ellie]

Hi every one!

I have nRF52840 dongle and BMD-300 Series Evaluation kit featuring the nRF52832.

I`d like to transmit continuous signals from nRF52832 to dongle(Desktop, Windows) without using any DFU controller(e.g. nRF Connect).
The reason is I have to display the graph of signals and process the signals for a real time.
I read several documents about DFU controller and DFU bootloader. But I`m beginner of ble and nRF52..... So, I really need your help!
My questions　are here(2) :
1. Is it possible to add a function of DFU controller in firmware of nRF52832?

2. If it is, Give me some advices how can I.

P.S. :　I read this document for coding firmware. but I can`t get the feel of DFU controller.
infocenter.nordicsemi.com/index.jsp

I am looking forward to receive a reply......Please give me help!!!!

[awneil]

I don't understand your question.

"DFU" = "Device Firmware Update" - this has nothing to do with transferring data for display!

So is your question about doing firmware updates (DFU), or is it about transferring data for display?

[Edvin]

Hello,

It seems you are a bit confused regarding the DFU part on the dongle.

The dongle does not have a programming chip like the DK has (that is the large chip with the white sticker). Therefore, the dongle comes pre-programmed with a bootloader, which is used to update the firmware on the dongle, as awneil said.

If you want to use the dongle, I suggest you look into the usbd_ble_uart example, found in the folder:

SDK15.2.0\examples\peripheral\usbd_ble_uart 

You can check the description of the example here.

Best regards,

Edvin

[Ellie]

Oh, I didn`t know that the dongle does not have a programming chip....

I want to display transferred data from nrf52 in a form of graph.

But I don`t know that I can receive the data without using nRF connect....!

Is there any solution about I can receive the data without nRF connect or display the data on nRF connect in a form of graph ?

[Ellie]

Thanks for reply!

I looked into the description recommended example.

But It seems that nRF52 communicate without BLE..

Is there any solution about I can receive the data without nRF connect or display the data on nRF connect in a form of graph ?

[awneil]

Ellie said:

It seems that nRF52 communicate without BLE..

Where on earth did you get that idea?

Take a look an the nRF52832 and nRF52840 Product Pages:

https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF52832

www.nordicsemi.com/.../nRF52840

they clearly can do BLE!

Ellie said:

Is there any solution about I can receive the data without nRF connect

Yes.

The whole point of Bluetooth (including BLE) is that it is a standard - it is not limited to any particular hardware of software.

This is achieved by GATT - Generic ATTributes:

https://www.bluetooth.com/specifications/gatt/generic-attributes-overview

https://learn.adafruit.com/introduction-to-bluetooth-low-energy/gatt

https://en.wikipedia.org/wiki/Bluetooth_Low_Energy

If you want to write your own BLE apps, you will have to study the documentation for your chosen platform(s); eg,

https://docs.microsoft.com/en-us/windows/uwp/devices-sensors/gatt-client

https://developer.android.com/guide/topics/connectivity/bluetooth-le

https://developer.apple.com/documentation/corebluetooth