twt setup: wrong parameter count

[ChengQing Zhao]

I want to use the example of "Wi Fi: Shell" to set TWT parameters by referring to the official documentation：

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/protocols/wifi/station_mode/powersave.html

and blogs:

 https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/target-wake-time-on-the-nrf7002-dk 

i set the command such as :

wifi twt setup 0 0 1 1 0 1 1 1 65000 524000

OR

wifi twt setup 0 0 2 2 0 1 1 1 20 60000

but  it is print "setup: wrong parameter count", as shown in log :

uart:~$ > wifi status
wifi status
Status: successful
==================
State: COMPLETED
Interface Mode: STATION
Link Mode: WIFI 6 (802.11ax/HE)
SSID: OpenWrt_1F05DA_5G
BSSID: 94:83:C4:1F:05:DA
Band: 5GHz
Channel: 36
Security: WPA2-PSK
MFP: Optional
RSSI: -38
Beacon Interval: 100
DTIM: 1
TWT: Supported
uart:~$ > wifi twt setup 0 0 1 1 0 1 1 1 65000 524000
wifi twt setup 0 0 1 1 0 1 1 1 65000 524000
setup: wrong parameter count
setup - Start a TWT flow:
<negotiation_type, 0: Individual, 1: Broadcast, 2: Wake TBTT>
<setup_cmd: 0: Request, 1: Suggest, 2: Demand>
<dialog_token: 1-255> <flow_id: 0-7> <responder: 0/1> <trigger: 0/1>
<implicit:0/1> <announce: 0/1> <twt_wake_interval: 1-262144us>
<twt_interval: 1us-2^31us>.
<twt_wake_ahead_duration>: 0us-2^31us>

uart:~$ > wifi twt setup 0 0 2 2 0 1 1 1 20 600000
wifi twt setup 0 0 2 2 0 1 1 1 20 600000
setup: wrong parameter count
setup - Start a TWT flow:
<negotiation_type, 0: Individual, 1: Broadcast, 2: Wake TBTT>
<setup_cmd: 0: Request, 1: Suggest, 2: Demand>
<dialog_token: 1-255> <flow_id: 0-7> <responder: 0/1> <trigger: 0/1>
<implicit:0/1> <announce: 0/1> <twt_wake_interval: 1-262144us>
<twt_interval: 1us-2^31us>.
<twt_wake_ahead_duration>: 0us-2^31us>

uart:~$ > wifi twt setup 0 0 2 2 0 1 1 1 20 300000
wifi twt setup 0 0 2 2 0 1 1 1 20 300000
setup: wrong parameter count
setup - Start a TWT flow:
<negotiation_type, 0: Individual, 1: Broadcast, 2: Wake TBTT>
<setup_cmd: 0: Request, 1: Suggest, 2: Demand>
<dialog_token: 1-255> <flow_id: 0-7> <responder: 0/1> <trigger: 0/1>
<implicit:0/1> <announce: 0/1> <twt_wake_interval: 1-262144us>
<twt_interval: 1us-2^31us>.
<twt_wake_ahead_duration>: 0us-2^31us>

[01:11:20.519,226] <inf> wpa_supp: nordic_wlan0: WPA: Group rekeying completed with 94:83:c4:1f:05:da [GTK=TKIP]
uart:~$

so, can you give me some help, thank you very much!

[Håkon Alseth]

Hi,

 

There was a new addition to the twt command in wifi/shell, which is the last parameter:

<twt_wake_ahead_duration>: 0us-2^31us>

You can set this to '0' if you want.

 

Another tip is to use the wifi/twt sample as well for evaluation of this power saving feature.

 

Kind regards,

Håkon

[ChengQing Zhao]

Thank you H å kon Alseth for your prompt response. I have encountered a new issue again, as you provided. I added 0 at the end, but still cannot negotiate successfully.

The command comes from the blog：

 https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/target-wake-time-on-the-nrf7002-dk 

The log print as:

uart:~$ > wifi twt setup 0 0 2 2 0 1 1 1 20 60000 0
wifi twt setup 0 0 2 2 0 1 1 1 20 60000 0
TWT setup with TWT individual negotiation failed. reason : Peer not TWT capable
[02:19:52.113,739] <inf> wpa_supp: nordic_wlan0: WPA: Group rekeying completed with 94:83:c4:1f:05:da [GTK=TKIP]
uart:~$

[Håkon Alseth]

Hi,

 

ChengQing Zhao said:

TWT setup with TWT individual negotiation failed. reason : Peer not TWT capable

This means that the AP is not capable of TWT. Which access point specifically are you using? If it is wifi 6 capable, it might be that you need to enable Target Wake Time specifically in the router web UI.

 

Kind regards,

Håkon

[ChengQing Zhao]

Thank you for your prompt response, Håkon Alseth,  i think the router is support TWT, the log as follow,

and the command  "wifi twt setup 0 0 1 1 0 1 1 1 65000 524000 0" is ok

but why “wifi twt setup 0 0 2 2 0 1 1 1 20 60000 0 ” from  https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/target-wake-time-on-the-nrf7002-dk 

can not set TWT.

the  the log as follow：

uart:~$ > wifi status
wifi status
Status: successful
==================
State: COMPLETED
Interface Mode: STATION
Link Mode: WIFI 6 (802.11ax/HE)
SSID: OpenWrt_1F05DA_5G
BSSID: 94:83:C4:1F:05:DA
Band: 5GHz
Channel: 36
Security: WPA2-PSK
MFP: Optional
RSSI: -42
Beacon Interval: 100
DTIM: 1
TWT: Supported
uart:~$ > wifi twt setup 0 0 1 1 0 1 1 1 65000 524000
wifi twt setup 0 0 1 1 0 1 1 1 65000 524000
setup: wrong parameter count
setup - Start a TWT flow:
<negotiation_type, 0: Individual, 1: Broadcast, 2: Wake TBTT>
<setup_cmd: 0: Request, 1: Suggest, 2: Demand>
<dialog_token: 1-255> <flow_id: 0-7> <responder: 0/1> <trigger: 0/1>
<implicit:0/1> <announce: 0/1> <twt_wake_interval: 1-262144us>
<twt_interval: 1us-2^31us>.
<twt_wake_ahead_duration>: 0us-2^31us>

uart:~$ > wifi twt setup 0 0 1 1 0 1 1 1 65000 524000 0
wifi twt setup 0 0 1 1 0 1 1 1 65000 524000 0
TWT operation TWT setup with dg: 1, flow_id: 1 requested
TWT response: TWT accept
== TWT negotiated parameters ==
TWT Dialog token: 1
TWT flow ID: 1
TWT negotiation type: TWT individual negotiation
TWT responder: true
TWT implicit: true
TWT announce: true
TWT trigger: true
TWT wake interval: 65024 us
TWT interval: 524000 us
========================
uart:~$ > wifi twt setup 0 0 2 2 0 1 1 1 20 60000 0
wifi twt setup 0 0 2 2 0 1 1 1 20 60000 0
TWT setup with TWT individual negotiation failed. reason : Peer not TWT capable
[00:03:27.207,946] <err> wifi_nrf: nrf_wifi_wpa_supp_signal_poll: Failed to get station info, ret = -11
[00:03:27.207,977] <err> wpa_supp: wpa_drv_zep_signal_poll: Signal polling failed: -1

[00:03:27.208,679] <err> wpa_supp: Command failed: FAIL
[00:03:27.208,709] <wrn> wpa_supp: z_wpa_supplicant_status:Failed to read RSSI

[00:03:32.210,510] <err> wifi_nrf: nrf_wifi_supp_get_conn_info: Timeout: failed to get connection info, ret = -11
[00:03:32.211,303] <err> wpa_supp: wpa_drv_zep_get_conn_info: Failed to get connection info: -1

[00:03:32.211,425] <wrn> wpa_supp: z_wpa_supplicant_status: Failed to get connection

[Håkon Alseth]

Hi,

 

My apologies for missing this.

ChengQing Zhao said:

uart:~$ > wifi twt setup 0 0 2 2 0 1 1 1 20 60000 0
wifi twt setup 0 0 2 2 0 1 1 1 20 60000 0
TWT setup with TWT individual negotiation failed. reason : Pe

In previous SDK versions, the intervals were given in milliseconds, while in newer versions; it is given in microseconds for setting a more accurate resolution.

Try to send 20000 instead.

To maintain the twt_interval to 1 minute (60 seconds), the "60000" (60*1000 ms) need to be changed to 60000000.

 

Kind regards,

Håkon

[ChengQing Zhao]

Thank you Håkon Alseth, i am sorry so late to reply to you, it is run ok now, but i meet a new question, how can i run iperf  on the TWT mode and DTIM mode  by the nRF7002-DK.

As you can see the log below, there is no zperf command.

uart:~$ > wifi twt teardown_all
wifi twt teardown_all
TWT teardown succeeded for flow ID 1
TWT operation TWT teardown all flows success
uart:~$ > wifi twt setup 0 0 2 2 0 1 1 1 20000 60000000 0
wifi twt setup 0 0 2 2 0 1 1 1 20000 60000000 0
TWT operation TWT setup with dg: 2, flow_id: 2 requested
TWT response: TWT accept
== TWT negotiated parameters ==
TWT Dialog token: 2
TWT flow ID: 1
TWT negotiation type: TWT individual negotiation
TWT responder: true
TWT implicit: true
TWT announce: true
TWT trigger: true
TWT wake interval: 19968 us
TWT interval: 60030000 us
========================
uart:~$ > zperf
zperf
zperf: command not found

[ChengQing Zhao]

I find the throughput example, zperf command is ok, but it can not set TWT mode, as shown in the log.

So, i do not know how to run iperf under TWT and DTIM mode, i want to test the performance under this two save power mode, can you give some help, thank you very much!

uart:~$ > zperf
zperf
zperf - Zperf commands
Subcommands:
connectap : Connect to AP
setip : Set IP address
<my ip> <prefix len>
Example setip 2001:db8::2 64
Example setip 192.0.2.2

tcp : Upload/Download TCP data
udp : Upload/Download UDP data
version : Zperf version
uart:~$ > twt
twt
twt: command not found
uart:~$