nRF9160 DK sleep current too high after opening and closing a TCP socket

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Thomas — Wed, 02 Sep 2020 08:55:36 GMT

Hi Sigurd,

I see this has not been fixed in version 1.2.1 of the the modem firmware. Any further update on this? Will it be in 1.2.2?

Kind regards,

Thomas

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Sigurd — Wed, 12 Aug 2020 10:56:10 GMT

[quote userid="75759" url="~/f/nordic-q-a/63835/nrf9160-dk-sleep-current-too-high-after-opening-and-closing-a-tcp-socket/264201"]Do you have any indication when a fix might be released?[/quote]

No timeline for this yet. Maybe in a couple of months.

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Thomas — Wed, 12 Aug 2020 09:25:42 GMT

Okay that is good to know, Thanks Sigurd.

Do you have any indication when a fix might be released?

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Sigurd — Wed, 12 Aug 2020 08:56:38 GMT

Hi Thomas,

[quote userid="75759" url="~/f/nordic-q-a/63835/nrf9160-dk-sleep-current-too-high-after-opening-and-closing-a-tcp-socket/264141"]Surely if the modem is no longer registered or powered off it should stop?[/quote]

Yes, I believe so. The modem team is studying how to improve the power efficiency in TCP, but it may take some time. At the moment the problem is that some TCP timers are left running even though they should be stopped.

[quote userid="75759" url="~/f/nordic-q-a/63835/nrf9160-dk-sleep-current-too-high-after-opening-and-closing-a-tcp-socket/264144"]Could this not lead to socket issues? There are only a limited number of sockets and if the modem does not free them up properly they will quickly run out?[/quote]

No, socket is closed correctly, it is only TCP protocol inside modem that keeps waking up because of missing TCP FIN from server side.

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Thomas — Wed, 12 Aug 2020 03:40:24 GMT

Could this not lead to socket issues? There are only a limited number of sockets and if the modem does not free them up properly they will quickly run out?

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Thomas — Wed, 12 Aug 2020 02:07:32 GMT

Thank you Sigurd,

Surely if the modem is no longer registered or powered off it should stop?

Kind regards,

Thomas

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Sigurd — Tue, 11 Aug 2020 10:37:55 GMT

Hi Thomas,

The nRF9160 closes the TCP connection but server doesn't send TCP FIN. The modem therefore keeps polling incoming data.
The TCP server should have finalized closing of TCP connection by sending TCP FIN.
We will look into ways to optimize this in the modem in future modem fw releases.

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Thomas — Fri, 31 Jul 2020 07:34:48 GMT

Thanks for the update Hakon

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Hakon — Thu, 30 Jul 2020 13:08:46 GMT

Sigurd is on vacation till August 10th. The modem team is currently working on your case, but the progress is slow as a lot of the staff is on vacation these days.

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Thomas — Thu, 30 Jul 2020 08:57:28 GMT

Sigurd?

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Thomas — Thu, 23 Jul 2020 01:10:03 GMT

Hi Sigurd,

Is there any update on this?

Kind regards,

Thomas

RE: nRF9160 DK sleep current too high after opening and closing a TCP socket

Sigurd — Thu, 16 Jul 2020 08:50:50 GMT

Hi,

Thanks for reporting this. I will check the behavior with the Nordic modem firmware team.