Write Bluetooth Relay App for Android

[BitBiter]

Hello,

im new in programming for Bluetooth.

I would start it to create a Bluetooth App for Android to control a relay.

The old App for this is not obtainable anymore.

I think im right that its a nRF51822 chip on it how you can see in the picture (click on it to see it complete).

Can someone tell me how should I proceed?

[Priyanka]

Hi Andreas,

Do you wish to program with the nRF51 chip shown in the picture? This is an old chip and we currently have the nRF52 and nRF53 series as well. Also, for the nRF51 you will have to use our old SDK (nRF5 SDK).

We have some BLE guides on our website: https://devzone.nordicsemi.com/guides/short-range-guides/b/bluetooth-low-energy  

Best Regards,

Priyanka

[BitBiter]

Thx but my first problem is, how to connect?

The App for this doesn't exist anymore, and there are no connections possibility to get access via J-Link.

[Turbo J]

You can always try the nrf connect app for android / ios. But it will take quite a bit of guesswork and/or luck to operate the device.

[Priyanka]

Hi Andreas,

The nRF51 series, as I mentioned earlier, is quite old, so it is only supported by the nRF5 SDK. Also, please note that the highest version of nRF5 SDK that supports nRF51 series programming is the nRF5SDK v12.3.0. So please be careful to download that version from our website. You can find some interesting sample applications and examples when you download the nRF5SDK from our website: https://www.nordicsemi.com/Products/Development-software/nRF5-SDK/Download?lang=en#infotabs:~:text=12.3.0,nRF5%20SDK 

Please take a look at the examples available on this SDK: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/examples.html?cp=9_5_10_4 

Unlike what @Jörg Fischer mentioned, you cannot use the entire nRF Connect for Desktop application, because it is meant for mainly the nRF52 series onwards and also mainly intended for the nRF Connect SDK. But you can use the "Programmer" app within this application with the help of which you can write a firmware onto the board.

-Priyanka

[Turbo J]

Should have menioned in my post: The NRF connect app in Android and iOS are very different from the NRF connect app for desktop.

The NRF connect apps on mobile devices allow inspecting service UUIDs and allow sending/recveiving arbitrary bytes. I don't think that you can do that with the desktop app, at least not without additional hardware.