Xiaomi Mi Router 3g - Airplay 2 devices disappear - Same SSID - 2 Wireless

Hi,

I'm using a Xiaomi Router 3g with OpenWRT (with latest fw).
I don't explain what happens.
I'm using 2 wireless (2,4+5) with same SSID, one with wifi N, the other is wifi ac.
After a period when I want to play music on my iPhone and want to stream to an "Airplay 2" devices : 1 HomePod and 1 Airport Express (latest fw with Airplay 2 compatibility), sometimes, all Airplay 2 devices disparear.
If I reboot the router devices appear again.

Any help ?

Are they close enough to the router so we can safely exclude distance factor?

What other devices are connected? What's on 2.4 and what's on 5?

All are in the same room with 5 meters close to the router.
I will check what's on 2.4 / 5.
I verified "client isolation" is uncheked.

I have 8 devices on wifi N and 6 devices on wifi AC.

Here is my config :

config wifi-device 'radio0'
	option type 'mac80211'
	option hwmode '11g'
	option path 'pci0000:00/0000:00:00.0/0000:01:00.0'
	option htmode 'HT20'
	option legacy_rates '1'
	option country 'FR'
	option channel 'auto'

config wifi-device 'radio1'
	option type 'mac80211'
	option hwmode '11a'
	option path 'pci0000:00/0000:00:01.0/0000:02:00.0'
	option htmode 'VHT80'
	option legacy_rates '1'
	option country 'FR'
	option channel 'auto'

config wifi-iface
	option device 'radio0'
	option mode 'ap'
	option network 'lan'
	option encryption 'psk2'
	option key '<my secret key hidden for security reason>'
	option ssid '<my ssid hidden for security reason>'

config wifi-iface
	option device 'radio1'
	option mode 'ap'
	option network 'lan'
	option encryption 'psk2'
	option key '<my secret key hidden for security reason>'
	option ssid '<my ssid hidden for security reason>'

I thought maybe the Airplay devices were on a separate band so the issue would be with the band not the devices in particular.

Could you give it a try to choose a channel rather than leaving it to auto? Maybe you have interference where you live, the router keeps changing channels and the Airplay devices don't like it?

Thanks for your reply.

I fixed 2,4 Ghz channel to 6 and 5 Ghz to 52.
I used Diagnostic Wireless Utility on Mac OS.

What are the default settings for operating frequency ? for 2,4 and 5 ?

There is no "default". For 2.4 GHz, Channels 1, 6 and 11 are the preferred as they are not overalpping. It could be a good idea to run a WiFi utility to see what channel is the clearest, especially if you live in a building with many neighbours. Though this is not always helpful, as often you will have the neighbours having their channels set to auto.

For 5 GHz, you are less likely to get much interference form neighbours as it has shorter range in general.

For the sake of trying, you could just turn the 5 GHz off and have everything on the 2.4 GHz to see if that works first before you look into the 5 GHz.

For me the last release is bad in 5Ghz with Xiaomi Router 3G and also with a WR1200JS.

I have find in my linux computer an old release ( 4.14.102 )

Xiaomi Wifi Router 3G - 18.06.x / Wifi issues 2.4GHz + 5GHz

I just restart a compilation and the firmware 4.14.102 will be ready in less than an hour

https://mega.nz/#!PkcTwSCI!ci8OHXkLhDH-oNExHDrKNG2qTFouPROfJvTorx8c3GI

A post was merged into an existing topic: Xiaomi Wifi Router 3G - 18.06.X / feedback and help