Can't use 5GHz wifi network

Installing and Using OpenWrt Network and Wireless Configuration
1

I am using TP-Link Archer C2 v1 with OpenWrt 19.07.4 r11208-ce6496d796 / LuCI openwrt-19.07 branch git-20.247.75781-0d0ab01.
After changing the 5GHz wifi channel to 128, the 5GHz wifi can't use.

Mon Nov  2 12:13:22 2020 user.notice mac80211: Failed command: iw phy phy0 set antenna 0xffffffff 0xffffffff
Mon Nov  2 12:13:23 2020 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
Mon Nov  2 12:13:23 2020 kern.info kernel: [ 1703.340963] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Mon Nov  2 12:13:23 2020 daemon.err hostapd: nl80211: Could not configure driver mode
Mon Nov  2 12:13:23 2020 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Mon Nov  2 12:13:23 2020 daemon.err hostapd: nl80211 driver initialization failed.
Mon Nov  2 12:13:23 2020 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->DISABLED
Mon Nov  2 12:13:23 2020 daemon.notice hostapd: wlan0: AP-DISABLED
Mon Nov  2 12:13:23 2020 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING
Mon Nov  2 12:13:23 2020 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
Mon Nov  2 12:13:23 2020 daemon.notice netifd: radio0 (10589): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process 3559 path ()
Mon Nov  2 12:13:23 2020 daemon.notice netifd: radio0 (10589): Device setup failed: HOSTAPD_START_FAILED
2

Which country do you have configured?

3

I set Hong Kong

4

Most likely either not allowed or blocked by DFS. You shouldn't hard choose a DFS channel.

1 Like
5

What should I do to fix it. Now change to auto but not work.

6

... I am using TP-Link Archer C2 v1 ...

Following posted by OpenWrt:

Unsupported functions WiFi 5GHz

7

It's C2 not C7

8

My mistake, disregard my previous post.

If not tried already,
You can try
System > Backup / Flash Firmware > Perform reset

9

Well auto also sometimes has issues.
I would first try with some of the lower none DFS channels like <50

2 Likes
10

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