nrf54l15 android 7.0 nrf connect 4.26.1 cannot connect stably

RE: nrf54l15 android 7.0 nrf connect 4.26.1 cannot connect stably

Nordfield — Thu, 09 Apr 2026 00:47:03 GMT

But the protocol stack is different, and the implementation details may vary in ZEPHYR. Fortunately, there are few old Android devices now, so we can temporarily ignore this issue. Compatibility is indeed quite troublesome, so for now, the focus is on WIN11 and new mobile devices.Thank you!

RE: nrf54l15 android 7.0 nrf connect 4.26.1 cannot connect stably

Amanda Hsieh — Wed, 08 Apr 2026 16:57:15 GMT

[quote user="Nordfield"]the nrf53832，sdk 17.0， android 7.0 , work ok.[/quote]

You can refer to the connection parameters from that project or compare their sniffer logs to find the differences.

RE: nrf54l15 android 7.0 nrf connect 4.26.1 cannot connect stably

Nordfield — Wed, 08 Apr 2026 15:34:07 GMT

But, the nrf53832，sdk 17.0， android 7.0 , work ok.

RE: nrf54l15 android 7.0 nrf connect 4.26.1 cannot connect stably

Nordfield — Wed, 08 Apr 2026 15:32:51 GMT

Maybe that, The Copilot can not fit it too.

RE: nrf54l15 android 7.0 nrf connect 4.26.1 cannot connect stably

Amanda Hsieh — Wed, 08 Apr 2026 12:43:44 GMT

[quote user="Nordfield"]android 14, nrf connect 4.49, work ok.[/quote]

Seems the issue is on Android 7.0, which might have a restricted connection parameter requirement.

Does it work if you remove "CONFIG_BT_AUTO_PHY_UPDATE=n" and "CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n"?

RE: nrf54l15 android 7.0 nrf connect 4.26.1 cannot connect stably

Nordfield — Wed, 08 Apr 2026 07:32:49 GMT

On my board,no nRF-Sniffer-for-Bluetooth-LE log, android 14, nrf connect 4.49, work ok.

RE: nrf54l15 android 7.0 nrf connect 4.26.1 cannot connect stably

Amanda Hsieh — Tue, 07 Apr 2026 16:26:59 GMT

Hi,

[quote user=""]MCU:NRF54L15，NCS SDK V3.2.4，android 7.0, nrf connect 4.26.1, cannot connect stably.[/quote]

Does it only happen to Android 7.0? Could you try another newer Android version?

Could you provide the nRF-Sniffer-for-Bluetooth-LE log?

[quote user=""]

prj.conf

CONFIG_BT_AUTO_PHY_UPDATE=n

CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n

[/quote]

Does it work if you remove these two configs?

Might I know any special reason to disable automatic PHY updates and connection parameter updates?

Are you able to reproduce the issue on nRF54L15DK? Or does it only happen on your custom board?

Regards,
Amanda H.