In Nrf7002dk facing issue with TWT Powersave Mechanism

[Jaswanth Rajigiri]

Hi,

1. I was facing issue with my nordic device saying 

[02:16:46.206,481] <err> net_pkt: Data buffer (1328) allocation failed.
[02:16:46.206,481] <wrn> net_conn: pkt cloning failed, pkt 0x2003a454 dropped

continuously , attached video below for your reference.

 2. I need to test TWT powersave using Nrf7002dk, what i was doing was 

• Initially turning on powersave using " wifi ps on "
• Connecting wifi using " wifi connect SSID Password "
• After successful connection starting ping to the nordic ip which i took from "net iface show" through my laptop which is in the same network and ping is happening.
• Now entering " wifi twt setup 0 0 2 2 0 0 1 0 20000 3000000 " command and output occurred as uart:~$ wifi twt setup 0 0 2 2 0 0 1 0 20000 3000000
  TWT operation TWT setup with dg: 2, flow_id: 2 requested
  TWT response: TWT reject
  TWT Dialog token: 2
  TWT flow ID: 2
  TWT negotiation type: TWT individual negotiation
  TWT responder: true
  TWT implicit: true
  TWT announce: false
  TWT trigger: false
  TWT wake interval: 19968 us
  TWT interval: 3002000 us
  ======================

But even after i have given wake interval it should go to sleep and should wake after the given wake interval time, but i was not happening in that way, it was continuously pinging or reachable without sleep.

3. When i was giving net tcp connect IP Port it was disconnecting with errors

uart:~$ net tcp connect 172.40.9.203 5001

Connecting from 172.40.9.248:0 to 172.40.9.203:5001

TCP connection failed (-116)

[00:13:28.327,423] <err> os: ***** BUS FAULT *****

[00:13:28.327,423] <err> os: Precise data bus error

[00:13:28.327,423] <err> os: BFAR Address: 0xc809

[00:13:28.327,453] <err> os: r0/a1: 0x00000000 r1/a2: 0x00000002 r2/a3: 0x0000c809

[00:13:28.327,453] <err> os: r3/a4: 0x20012e60 r12/ip: 0x200298f4 r14/lr: 0x0004d67f

[00:13:28.327,453] <err> os: xpsr: 0x21000000

[00:13:28.327,453] <err> os: Faulting instruction address (r15/pc): 0x000738a4

[00:13:28.327,484] <err> os: >>> ZEPHYR FATAL ERROR 25: Unknown error on CPU 0

[00:13:28.327,484] <err> os: Current thread: 0x20002af8 (tcp_work)

[00:13:28.390,502] <err> coredump: #CD:BEGIN#

[00:13:28.396,270] <err> coredump: #CD:5a4501000300050019000000

[00:13:28.403,594] <err> coredump: #CD:4102004400

[00:13:28.409,698] <err> coredump: #CD:000000000200000009c80000602e0120f49802207fd60400a438070000000021

[00:13:28.420,501] <err> coredump: #CD:98d4002000000000000000000000000000000000000000000000000000000000

[00:13:28.431,304] <err> coredump: #CD:00000000

[00:13:28.437,225] <err> coredump: #CD:4d0100f82a0020c02b0020

[00:13:28.444,366] <err> coredump: #CD:70230020a47d0020000000000080f20000000000000000000000000000000000

[00:13:28.455,169] <err> coredump: #CD:00000000000000000000000000000000a447002000000000ffffffffffffffff

[00:13:28.466,003] <err> coredump: #CD:00000000ffffffff000000000000000070d4002000000000502b0020502b0020

[00:13:28.476,806] <err> coredump: #CD:000100001dd70400f82a00200000000000000000903500207463705f776f726b

[00:13:28.487,609] <err> coredump: #CD:0000000000000000000000000000000000000000000000000000000020d10020

[00:13:28.498,413] <err> coredump: #CD:0004000000000000301600200000000000000000000000000000000000000000

[00:13:28.509,216] <err> coredump: #CD:0000000000000000

[00:13:28.515,838] <err> coredump: #CD:4d010020d1002020d50020

[00:13:28.522,979] <err> coredump: #CD:f0f0f0f0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.533,782] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.544,586] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.555,419] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.566,223] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.577,026] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.587,829] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.598,632] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.609,436] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.620,239] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.631,042] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.641,845] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.652,648] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.663,452] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.674,255] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.685,058] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[00:13:28.695,861] <err> coredump: #CD:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa7035002045db0400

[00:13:28.706,665] <err> coredump: #CD:e0330020887d0020f82a0020c1db0400fffffffff82a002080120020df320700

[00:13:28.717,498] <err> coredump: #CD:ffffffffffffffffffffffffed88002003000000ed88002000000000cf040600

[00:13:28.728,302] <err> coredump: #CD:70070020f4980220ed880020487e0700b8d30020030000000723060035230600

[00:13:28.739,105] <err> coredump: #CD:03000000d47207001b000000d2880020072306000d2b06000300000000000000

[00:13:28.749,908] <err> coredump: #CD:0000000000000000d0410000b03c0020f87d07000a000000a519090018000000

[00:13:28.760,711] <err> coredump: #CD:1b00000049260600f87d07008926060051260600c0d400201c000000ab5a0000

[00:13:28.771,514] <err> coredump: #CD:3ed400203b3307005029002051260600a6190900000000000000000005160200

[00:13:28.782,318] <err> coredump: #CD:48d40020a319090050010000181a002000000000d61d00007035002045db0400

[00:13:28.793,121] <err> coredump: #CD:e0330020887d0020f82a0020c1db0400fffffffff82a0020a4470020df320700

[00:13:28.803,955] <err> coredump: #CD:ffffffffffffffffffffffff2ddd04000000000000ed00e0887d002000000000

[00:13:28.814,758] <err> coredump: #CD:f4980220f1d40400a8bf000000000061f2ffffffa44700200000000002000000

[00:13:28.825,561] <err> coredump: #CD:09c80000602e0120f49802207fd60400a4380700000000210000000044930220

[00:13:28.836,364] <err> coredump: #CD:8cffffff156b0600449302208cfffffff82a0020d4930220b07d0020a1d70400

[00:13:28.847,167] <err> coredump: #CD:ffffffffffffffff00000000aaaaaaaaaaaaaaaa1dd704000000000000000000

[00:13:28.857,971] <err> coredump: #CD:0000000000000000000000000000000000000000ddfc050000000000aaaaaaaa

[00:13:28.868,743] <err> coredump: #CD:END#

[00:13:28.874,328] <err> fatal_error: Resetting system

I need help on both points, ASAP because it was stopping my testing. 

[Håkon Alseth]

Hi,

 

it seems that your video was not fully uploaded. Could you re-attach it?

  

But even after i have given wake interval it should go to sleep and should wake after the given wake interval time, but i was not happening in that way, it was continuously pinging or reachable without sleep.

TWT was rejected by the access point:

TWT operation TWT setup with dg: 2, flow_id: 2 requested
TWT response: TWT reject

Try to adjust your TWT timing, specifically this one:

TWT wake interval: 19968 us

To for instance 65000.

uart:~$ net tcp connect 172.40.9.203 5001

Connecting from 172.40.9.248:0 to 172.40.9.203:5001

TCP connection failed (-116)

[00:13:28.327,423] <err> os: ***** BUS FAULT *****

[00:13:28.327,423] <err> os: Precise data bus error

[00:13:28.327,423] <err> os: BFAR Address: 0xc809

It looks like you are using wifi/shell.

Could you try adding the configurations from overlay-zperf.conf? This will expand the amount of sockets and overall buffers.

 

Kind regards,

Håkon

[Jaswanth Rajigiri]

Håkon Alseth said:

To for instance 65000

Tried the same by limiting the time but even though we gave the sleep interval,client is continuously in wake state as you see in the ping and once after disconnected from wifi then only it went to offline saying host is unreachable 

  

[Jaswanth Rajigiri]

HI,

but when i was running zperf download i was not receiving any buffer data in my sniffer capture,

[Jaswanth Rajigiri]

I want to run in loop that means i device should go to sleep for every 10 sec and should be awake for 3 sec and should receive the buffer data in the awake period and this should continue until i give tear down command , need the exact command for the same.and should see this through wire shark capture .

Please do the needful ASAP

Regards,

Jaswanth.

[Håkon Alseth]

Hi,

 

Jaswanth Rajigiri said:

but when i was running zperf download i was not receiving any buffer data in my sniffer capture,

You started listening on the nRF, ie. zperf server is running on that device. You then need to connect via a iperf2 compatible client.

Jaswanth Rajigiri said:

I want to run in loop that means i device should go to sleep for every 10 sec and should be awake

Feel free to do this by adjusting twt_interval parameter.

Jaswanth Rajigiri said:

need the exact command for the same

Please see the documentation for wifi/shell TWT command in this list:

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/wifi/shell/README.html#supported_cli_commands

 

Please notice the intervals, especially the boundaries for twt_wake_interval.

 

Kind regards,

Håkon

[Jaswanth Rajigiri]

Håkon Alseth said:

iperf2 compatible client.

can you explain how to do this, i have connected my nordic board to laptop which has iperf and iperf3 in it, do i need to run server in laptop on in nordic, if in nordic how to run it and which command do i need to give in my laptop ?

[Jaswanth Rajigiri]

Håkon Alseth said:

Feel free to do this by adjusting twt_interval parameter.

i was not getting like how to adjust correctly, can you give the direct command so that i will adjust the timings in it

[Jaswanth Rajigiri]

please check the attached sniffer onceTWT_checking.pcapng

Also ran twt command with wake interval 20000us that means 20sec and twt interval as 60sec, but it was not waking after 20 sec

[Håkon Alseth]

Jaswanth Rajigiri said:

wake interval 20000us that means 20sec

This is 20 ms, not 20 seconds.

Jaswanth Rajigiri said:

twt interval as 60sec, but it was not waking after 20 sec

This will make it wake up for 20 ms each 60 seconds.

Jaswanth Rajigiri said:

can you explain how to do this, i have connected my nordic board to laptop which has iperf and iperf3 in it, do i need to run server in laptop on in nordic, if in nordic how to run it and which command do i need to give in my laptop ?

In general, I would recommend that you check the manual for the programs that you use, in this case, you can see more details if you open a terminal and write "man iperf".

To setup iperf as a client, with TCP communication, here's an example:

iperf -c <nrf-ip>

 

Kind regards,

Håkon

[Jaswanth Rajigiri]

Håkon Alseth said:

This will make it wake up for 20 ms each 60 seconds

But this also not happening right? as per video i have attached

Håkon Alseth said:

iperf -c <nrf-ip>

Not working

Is there any possible to connect virtually regrading this issue?

[Håkon Alseth]

Hi,

 

Please test zperf/iperf without TWT enabled first, to ensure that your overall setup is as expected.

Håkon Alseth said:

This will make it wake up for 20 ms each 60 seconds.

This was incorrect, as per your latest video. You are now setting 20 ms active and 60 ms period. Is this wanted timing? It does not make sense to use TWT for such a low period.

 

Kind regards,

Håkon

[Jaswanth Rajigiri]

Hi,

Håkon Alseth said:

Please test zperf/iperf without TWT enabled first, to ensure that your overall setup is as expected.

without enabling TWT Zperf is working fine.

Håkon Alseth said:

This was incorrect, as per your latest video. You are now setting 20 ms active and 60 ms period. Is this wanted timing? It does not make sense to use TWT for such a low period.

what is the correct time periods to use TWT powersave, can you provide the wake interval and twt interval for the same.

And also if you see my sniffer in action frames i was not getting proper information for TWT setup and no announced, unannounced, accept or Request TWT related information also.

Regards,

Jaswanth.