How to transfer custom data through BLE in NCS?

[Joyop]

Hi,

I am developing a function based on NCS 1.9.1 that periodically sends customized messages to bluetooth-connected phones using the BLE of nrf52840.

I've checked DevZone and it seems there is only a guide based on the old SDK.

So, is there a NCS sample that I can refer to?

Looking forward to your reply.

Joyop

[Joyop]

I found a sample at .../samples/bluetooth/peripheral_uart, which seems to meet my requirements.

But when I do the tests as shown below, I met some problems at step 11~12.

1. I didn't see the text displayed on my "COM listener".

2. Failed to send data from the nrf52840dk to my phone. (PS: sending data from my phone to nrf52840dk is OK)

What caused these problems? Did I miss something?

[JONATHAN LL]

Hi,

Could it be that you are looking at the wrong terminal?

Check the other COM ports and see if you see anything printed there, might be that you are looking at the RTT log, it wont show the serial data printed.

Regards,
Jonathan

[Joyop]

Hi Jonathan,

Thanks for your reply.

What about the 2nd problem?(Failed to send data over BLE)

I tried to reinstall the nRF Connect app on my phone and the 2nd problem seems to be solved. But still don't understand why it has anything to do with app. 

Best wishes,

Joyop

[JONATHAN LL]

Difficult to say what is the issue wit out having a sniffer trace of what is going on. Many things could be the reason. If you are able to provide a sniffer trace then it will show what is happening and it is easier to determine where the problem lies. 

nRF Sniffer for Bluetooth LE - Downloads - nordicsemi.com

Regards,
Jonathan

[Joyop]

Thanks. Since I have already uninstalled the app with the problem, I cannot reproduce that problem temporarily. I will capture a log when I encounter this problem next time.

Besides,  I also want to know whether NUS can be used together with MCUboot. If so, is there a sample I can refer to?

[JONATHAN LL]

Joyop said:

Besides,  I also want to know whether NUS can be used together with MCUboot. If so, is there a sample I can refer to?

Yes, that should be possible, we don't have a example whit that, but starting with the NUS sample and adding config for MCUBoot should do the job. 

Regards,
Jonathan