Hi all !
So, like the title say, i'm trying to install OpenWRT on a raspi 4 to have a wi-fi access point. I installed the snapshot found here : https://openwrt.org/toh/raspberry_pi_foundation/raspberry_pi /etc/config/wireless file to set option disable '0'. Then, I restarted the network and now I have this error showing every few seconds :ieee80211 phy0: brcmf_cfg80211_start_ap: Set Channel failed: chspec=57386, -52/etc/config/wireless :
config wifi-device 'radio0'
option type 'mac80211'
option channel '36'
option hwmode '11a'
option path 'platform/soc/fe300000.mmcnr/mmc_host/mmc1/mmc1:0001/mmc1:0001:1'
option htmode 'VHT80'
option disabled '0'
option country 'FR'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ssid 'OpenWrt'
option encryption 'none'
Plus, I have another question (but maybe I have to do a second post ?) : I have enabled my eth0 to use dhcp and I can access Internet from my pi. I can ping it from another machine in my network but I can't access the web GUI page to activate the access point mode (even though I see option mode 'ap' in my /etc/config/wireless), set the SSID, ...
Thank you very much
trendy
December 18, 2019, 8:49am
2
What does iw list say?
For the luci, you need to install it manually . Snapshot versions don't include it.
What does iw list says?
Wiphy phy0
max # scan SSIDs: 10
max scan IEs length: 2048 bytes
max # sched scan SSIDs: 16
max # match sets: 16
max # scan plans: 1
max scan plan interval: 508
max scan plan iterations: 0
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports T-DLS.
Available Antennas: TX 0 RX 0
Supported interface modes:
* IBSS
* managed
* AP
* P2P-client
* P2P-GO
* P2P-device
Band 1:
Capabilities: 0x1022
HT20/HT40
Static SM Power Save
RX HT20 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT TX/RX MCS rate indexes supported: 0-7
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm)
* 2472 MHz [13] (20.0 dBm)
* 2484 MHz [14] (disabled)
Band 2:
Capabilities: 0x1062
HT20/HT40
Static SM Power Save
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT TX/RX MCS rate indexes supported: 0-7
VHT Capabilities (0x00001020):
Max MPDU length: 3895
Supported Channel Width: neither 160 nor 80+80
short GI (80 MHz)
SU Beamformee
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: not supported
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: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: not supported
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: 0 Mbps
Frequencies:
* 5170 MHz [34] (20.0 dBm)
* 5180 MHz [36] (20.0 dBm)
* 5190 MHz [38] (20.0 dBm)
* 5200 MHz [40] (20.0 dBm)
* 5210 MHz [42] (20.0 dBm)
* 5220 MHz [44] (20.0 dBm)
* 5230 MHz [46] (20.0 dBm)
* 5240 MHz [48] (20.0 dBm)
* 5260 MHz [52] (20.0 dBm) (radar detection)
* 5280 MHz [56] (20.0 dBm) (radar detection)
* 5300 MHz [60] (20.0 dBm) (radar detection)
* 5320 MHz [64] (20.0 dBm) (radar detection)
* 5500 MHz [100] (20.0 dBm) (radar detection)
* 5520 MHz [104] (20.0 dBm) (radar detection)
* 5540 MHz [108] (20.0 dBm) (radar detection)
* 5560 MHz [112] (20.0 dBm) (radar detection)
* 5580 MHz [116] (20.0 dBm) (radar detection)
* 5600 MHz [120] (20.0 dBm) (radar detection)
* 5620 MHz [124] (20.0 dBm) (radar detection)
* 5640 MHz [128] (20.0 dBm) (radar detection)
* 5660 MHz [132] (20.0 dBm) (radar detection)
* 5680 MHz [136] (20.0 dBm) (radar detection)
* 5700 MHz [140] (20.0 dBm) (radar detection)
* 5720 MHz [144] (disabled)
* 5745 MHz [149] (13.0 dBm)
* 5765 MHz [153] (13.0 dBm)
* 5785 MHz [157] (13.0 dBm)
* 5805 MHz [161] (13.0 dBm)
* 5825 MHz [165] (13.0 dBm)
valid interface combinations:
* #{ managed } <= 1, #{ P2P-device } <= 1, #{ P2P-client, P2P-GO } <= 1,
total <= 3, #channels <= 2
* #{ managed } <= 1, #{ AP } <= 1, #{ P2P-client } <= 1, #{ P2P-device } <= 1,
total <= 4, #channels <= 1
Supported extended features:
* [ DFS_OFFLOAD ]: DFS offload
Thank you trendy and tmomas for your answers on LuCI
trendy
December 18, 2019, 10:14am
5
Try to delete and recreate the wireless config file:rm /etc/config/wireless; wifi config; sed -i '/disabled/ s/1/0/g' /etc/config/wireless; wifi up
OK, if I do this, I do not have the error message again.
trendy
December 18, 2019, 10:38am
7
What does wifi status report?
This replies this :
{
"radio0": {
"up": true,
"pending": false,
"autostart": true,
"disabled": false,
"retry_setup_failed": false,
"config": {
"channel": "36",
"hwmode": "11a",
"path": "platform/soc/fe300000.mmcnr/mmc_host/mmc1/mmc1:0001/mmc1:0001:1",
"htmode": "VHT80",
"disabled": false
},
"interfaces": [
{
"section": "default_radio0",
"ifname": "wlan0",
"config": {
"mode": "ap",
"ssid": "OpenWrt",
"encryption": "none",
"network": [
"lan"
],
"mode": "ap"
}
}
]
}
}
I keeped on searching but found nothing yet.
Thank you very much by advance
mk24
December 18, 2019, 10:02pm
11
What does iw dev show?
If the AP is fully set up you'll see lines for SSID and channel.
I don't think the Pi hardware can do AP and STA at the same time. Configure only one interface the AP on the radio.
I have tried this with multiple USB devices and the Pi hardware and can not get the AP mode to load and start at all with OpenWRT
trendy:
I am out of ideas
No problem, you've already helped me very much, thanks
I don't want AP and STA at the same time, I just want AP...iw dev says this :
root@OpenWrt:/# iw dev
phy#0
Interface wlan0
ifindex 3
wdev 0x1
addr dc:a6:32:3b:1a:db
type AP
channel 1 (2412 MHz), width: 20 MHz, center1: 2412 MHz
txpower 31.00 dBm
@Coddigtion : I don't understand your message, I'm sorry
I have a PI 4 and no matter the configuration or the adapter I can not get it to have an AP mode.
trendy
December 19, 2019, 8:04am
15
I was under the impression that the adapter is 5GHz only. Weird that the wifi config didn't detect the 2,4GHz radio.
geekaume:
txpower 31.00 dBm
This also looks too much for 2,4GHz. For 5GHz it's okayish, although it conflicts with what iw list says.
Maybe we have to wait a stable release ?
@trendy : I'm not good enough in network to understand all what you said, I totally trust you on this ^^
jeff1
December 19, 2019, 9:26am
17
I use this settings on the PI 4, on 5GHz:
config wifi-device 'radio0'
option type 'mac80211'
option channel '36'
option hwmode '11a'
option path 'platform/soc/fe300000.mmcnr/mmc_host/mmc1/mmc1:0001/mmc1:0001:1'
option legacy_rates '0'
option country 'US'
option htmode 'VHT20'
on 2,4GHz :
config wifi-device 'radio0'
option type 'mac80211'
option path 'platform/soc/fe300000.mmcnr/mmc_host/mmc1/mmc1:0001/mmc1:0001:1'
option legacy_rates '0'
option country 'US'
option hwmode '11g'
option channel '7'
or
config wifi-device 'radio0'
option type 'mac80211'
option path 'platform/soc/fe300000.mmcnr/mmc_host/mmc1/mmc1:0001/mmc1:0001:1'
option legacy_rates '0'
option country 'US'
option hwmode '11g'
option channel '7'
option htmode 'HT20'
option short_gi_40 '0'
1 Like
Weird that 11a (5 GHz) does not work but 11g (2,4 GHz does)... Maybe the available drivers don't support 5 GHz? A lot of Broadcom stuff has footnotes like that.
What wireless hardware is this exactly? I'm not familiar with the RPi4. Out of curiosity.
I first thinked : "maybe it worked in 5 GHz but I think I don't have a device that supports wifi 5 GHz, so I didn't saw it worked".
I didn't even tried jeff1's configuration for 5GHz, so maybe I had a problem in my conf...
).
