Extended advertising (nRF52833 + S140) - Samsung S20+ can't connect, Huawei P30 can

[MatevzB]

So, we have a problem that the new Samsung S20+ phone is not able to connect to the nRF52833 if extended advertising is enabled (using nRF Connect for Mobile app).

The phone can see the device, but fails to establish the connection with the device in either PHY_1M or PHY_CODED modes. There is no event generated in the firmware when connection is being established. The phone shows 'Connecting' and then times out. If extended advertising is disabled, the phone can connect to the device with PHY_1M.

On the other 'hand', we have a Huawei P30, which has no issue connecting to the same device in either mode.

I would contact the Samsung support directly, but I guess Nordic has better 'ties' with appropriate engineers at Samsung...

[Simonr]

Simonr said:

Do you see this error on both devices or just one end?

By both devices, I meant both the Samsung as well as the debugging on the nRF side. Do you see this error when logging on the nRF device as well? 

Please try adding adv_params.properties.scannable = 1; and adv_coded = false; when advertising with the 1MBPS PHY. Take a look at this case where a customer has implemented switching between 1MBPS and CODED PHY advertising.

Best regards,

Simon