nRF51 messes with advertising data in connectable mode

RE: nRF51 messes with advertising data in connectable mode

Daniel Dakhno — Sun, 15 Nov 2020 02:13:07 GMT

You may be right, it looks like i interpreted some HCI traffic as beacon data.

I was just confused since the data wasn't generated then the device broadcasted non discoverable mode...

RE: nRF51 messes with advertising data in connectable mode

Vidar Berg — Fri, 13 Nov 2020 15:35:09 GMT

Yes, the android version of nRF connect has this option.

RE: nRF51 messes with advertising data in connectable mode

Daniel Dakhno — Fri, 13 Nov 2020 15:10:25 GMT

Is there any way to see the raw advertisement data in nRF connect?

RE: nRF51 messes with advertising data in connectable mode

Vidar Berg — Fri, 13 Nov 2020 15:06:40 GMT

Ok, so what I'm seeing is the raw HCI traffic. That's kind of hard to decode without context. Again, please test and verify this against a different scanner such as nRF connect.

RE: nRF51 messes with advertising data in connectable mode

Daniel Dakhno — Fri, 13 Nov 2020 14:49:17 GMT

I run hcitool lescan with the mac of the beacon whitelisted and have "hcidump --raw" running in parallel, which outputs the beacon data to me. I described the different data I get above.

RE: nRF51 messes with advertising data in connectable mode

Vidar Berg — Fri, 13 Nov 2020 14:43:25 GMT

What if you inspect the manufacturer field with nRF connect on Android or iOS, is it as expected then? I'm not sure how you are using hcidump for this.

RE: nRF51 messes with advertising data in connectable mode

Daniel Dakhno — Fri, 13 Nov 2020 13:40:46 GMT

I just took the ble_app_beacon from 12.3 on an nRF51822, changed PERIPHERAL_LINK_COUNT to 1 and m_adv_params.type to BLE_GAP_ADV_TYPE_ADV_IND.

That gives me the error when sniffing with a raspi using hcidump.

RE: nRF51 messes with advertising data in connectable mode

Vidar Berg — Fri, 13 Nov 2020 12:56:41 GMT

Hello,

The Softdevice does not alter the encoded payload provided by the app, or at least not supposed to. Are you able share the code you use so I can try to reproduce this here?

Thanks,

Vidar