Issues with dynamically adding/removing manufacturer specific data

RE: Issues with dynamically adding/removing manufacturer specific data

aeozyalcin — Wed, 01 Jul 2020 07:29:30 GMT

Thanks Amanda.

For others facing the same issue, I gave up and did it the way most others do. I have multiple advdata objects that hold various different advertisement configurations I use in my project (all with varying manufacturer data length). It's not elegant, but it works.

RE: Issues with dynamically adding/removing manufacturer specific data

Amanda Hsieh — Tue, 23 Jun 2020 13:33:12 GMT

Hi Anil,

[quote user=""]However I am finding that I can only utilize about 6 bytes of adv_manuf_data_data before my application crashes, due to most likely some sort of a buffer overflow. I don't have a proper Segger debugger, so I can't see exactly what error I am getting.[/quote]

We need the debug log to know what happened. You can the nRF52 DK which supports programming and debugging nRF51 and nRF52 devices mounted on external boards. See the Debug output documentation.

-Amanda H.

RE: Issues with dynamically adding/removing manufacturer specific data

aeozyalcin — Tue, 23 Jun 2020 04:46:11 GMT

I want to add one more thing I tried, to no avail:

I have also tried globally declaring ble_advdata_manuf_data_t variable, instead of locally declaring within a function, but it made no difference - I see the exact same behavior. Since we pass the pointer of ble_advdata_manuf_data_t variable to the ble_advdata_t variable (advdata.p_manuf_specific_data), I figured it should be ok to dynamically change the contents of ble_advdata_manuf_data_t as long as advertising is stopped. And when I want to remove the manufacturer data again, I just point to a null pointer like so:

advdata.p_manuf_specific_data = NULL;

But like I said, I see the issue as I described above. Thanks in advance.