Archer C7 V4 2GHz wifi issues

Installing and Using OpenWrt
1

Hi!

I recently bought 3 Archer C7 routers and flashed OepnWRT on them. Everything works great, except 2GHz wifi band. Latency on that side is so great that it's unusable. Tests shows reponses between 200ms and 4000ms. Average about 800ms.

With 5GHz band all is fine though. I've testes to flash OpenWRT snapshot, but same result. Could it be some issues with the drivers for that radio?

2

Perhaps only bad batch of routers then if I'm the only one noticed this.

3

Please show your Wireless configuration.

4

Here it is

config wifi-device 'radio0'
        option type 'mac80211'
        option hwmode '11a'
        option path 'pci0000:00/0000:00:00.0'
        option channel '60'
        option legacy_rates '1'
        option htmode 'VHT80'
        option country 'FI'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option network 'lan'
        option mode 'ap'
        option ssid 'ArcherC7-1-5G'
        option isolate '1'
        option encryption 'psk2'
        option key 'secret123'

config wifi-device 'radio1'
        option type 'mac80211'
        option channel '11'
        option hwmode '11g'
        option path 'platform/qca956x_wmac'
        option htmode 'HT20'
        option legacy_rates '1'
        option country 'FI'

config wifi-iface 'default_radio1'
        option device 'radio1'
        option network 'lan'
        option mode 'ap'
        option encryption 'psk2'
        option key 'secret123'
        option ssid 'ArcherC7-1'
        option isolate '1'
5

Have you tried changing the channel to some other value? Sometimes channels get overlapped and that can cause problems. Also try changing htmode to HT40. You can see the Wireless Documentation for further info. There are many possible values that can be configured.

6

Yes. Did try again now and the connection is getting worse.

I thought perhaps revert to original and test with that but afraid I could brick the router.

7

You may need to use trial and error method and come up with a stable config. There is no other way for wifi these days or probably an auto channel option if Openwrt supports it.