My TX2 can not see my 5Ghz wifi created with my HTC-U11 hot spot.
I am sure that the hot spot created with my HTC-U11 is ok cause my laptop can access that hot spot.
Dose it (tx2) support 802.11ac 5Ghz ?
Could you show me how to make a diagnosis on TX2 ?
Thanks.
There are several ways to list the access points seen by Linux:
sudo nmcli dev wifi list
sudo iw dev wlan0 scan
Hi snarky,
Thank you for your instruction. My laptop is T460p and I run ubuntu 17.04 on it.
The below is the hotspot I gather with your commands on my laptop.
It is the one that my TX2 can not see. Could you tell me what problem with my TX2 ? I really have no idea.
Many thanks.
* SSID MODE CHAN RATE SIGNAL BARS SECURITY
iwureka Infra 149 54 Mbit/s 79 ▂▄▆_ WPA2
BSS 40:4e:36:5c:b5:6d(on wlp3s0)
last seen: 1341.369s [boottime]
TSF: 184924114 usec (0d, 00:03:04)
freq: 5765
beacon interval: 100 TUs
capability: ESS Privacy ShortPreamble SpectrumMgmt RadioMeasure (0x1131)
signal: -62.00 dBm
last seen: 208 ms ago
Information elements from Probe Response frame:
SSID: iwureka
Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0
DS Parameter set: channel 153
Power constraint: 0 dB
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC MFP-capable (0x008c)
HT capabilities:
Capabilities: 0x1ee
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
No DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 2 usec (0x04)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 153
* secondary channel offset: below
* STA channel width: any
* RIFS: 0
* HT protection: no
* non-GF present: 0
* OBSS non-GF present: 0
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
WMM: * Parameter version 1
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
VHT capabilities:
VHT Capabilities (0x339179a2):
Max MPDU length: 11454
Supported Channel Width: neither 160 nor 80+80
short GI (80 MHz)
TX STBC
SU Beamformer
SU Beamformee
MU Beamformee
RX antenna pattern consistency
TX antenna pattern consistency
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 780 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 780 Mbps
VHT operation:
* channel width: 1 (80 MHz)
* center freq segment 1: 155
* center freq segment 2: 0
* VHT basic MCS set: 0xfffa
Extended capabilities: Extended Channel Switching, 6
What does the scan function say when you scan on the Jetson?
Are the antenna connectors firmly attached to the small U.FL-style connectors on the module?
What does “sudo rfkill list” say?
I forget what setup looks like, but did you select a country code for the WiFi? What is your intended country code?
Although, you’re right, mine only see the 2.4 GHz WiFi in my place too. I hadn’t noticed before, because I use wired 99% of the time.
I think the issue is that it doesn’t support “high” frequencies, at least by default:
Frequencies:
* 5180 MHz [36] (20.0 dBm)
* 5200 MHz [40] (20.0 dBm)
* 5220 MHz [44] (20.0 dBm)
* 5240 MHz [48] (20.0 dBm)
* 5260 MHz [52] (20.0 dBm) (no IR, radar detection)
DFS state: usable (for 3778 sec)
DFS CAC time: 60000 ms
* 5280 MHz [56] (20.0 dBm) (no IR, radar detection)
DFS state: usable (for 3778 sec)
DFS CAC time: 60000 ms
* 5300 MHz [60] (20.0 dBm) (no IR, radar detection)
DFS state: usable (for 3778 sec)
DFS CAC time: 60000 ms
* 5320 MHz [64] (20.0 dBm) (no IR, radar detection)
DFS state: usable (for 3778 sec)
DFS CAC time: 60000 ms
(This is from “sudo iw list”)
A country code is mentioned in the file /lib/firmware/brcm/nvram.txt
By default it’s set as ccode=XZ
However, I don’t know of changing this works. The nvram may be baked into the firmware already.
As said by someone from NVIDIA:
[url=Wifi/Multi-region support in TX1 SOM Module - Jetson TX1 - NVIDIA Developer Forums]
[/url]
Oh. I am sorry that I did not express clearly.
My TX2 did scan 2.4Ghz wifi access points.
It just can not scan my hotspot which is created by my HTC-U11 with 5Ghz.
Well, I have no other 5Ghz access points to make a comparison.
Below are the result of command: iw reg get on TX2
root@tegra-ubuntu:~# iw reg get
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR
(5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR
(5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR
(5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR
(57240 - 63720 @ 2160), (N/A, 0), (N/A)
root@tegra-ubuntu:~# iw reg set TW
root@tegra-ubuntu:~# iw reg get
country TW: DFS-JP
(2402 - 2472 @ 40), (N/A, 30), (N/A)
(5270 - 5330 @ 40), (N/A, 17), (0 ms), DFS
(5490 - 5590 @ 80), (N/A, 30), (0 ms), DFS
(5650 - 5710 @ 40), (N/A, 30), (0 ms), DFS
(5735 - 5835 @ 80), (N/A, 30), (N/A)
root@tegra-ubuntu:~# rfkill list
0: bluedroid_pm: Bluetooth
Soft blocked: yes
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: brcmfmac-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
root@tegra-ubuntu:~#
Even I execute “iw reg set TW”, the TX2 still can not find my 5Ghz hot spot.
Yes; it’s likely the firmware simply refuses to operate on the frequency that your access point is set to use.
Try some other channels and see if they show up?
Well, the channel can not be set on the default configure page in my phone.
Forget it. I have the TX2 connects to ethernet.
Thank you anyway.