[Solved] Share working config for Archer C7 on 19.07?

I'm having some issues with some legacy devices that only connect via 2.4GHz, I think I have some setting enabled that is preventing the b/g network to work and the b/g/n network isn't working for them. (Would there be any issues if they share the same SSID and key?)

Anyone mind sharing their own config?

Overview

Model: TP-Link Archer C7 v2
Architecture: Qualcomm Atheros QCA9558 ver 1 rev 0
Firmware Version: OpenWrt 19.07.0 r10860-a3ffeb413b / LuCI openwrt-19.07 branch git-20.010.60094-335692a
Kernel Version: 4.14.162

/etc/config/wireless

root@OpenWrt:~# cat /etc/config/wireless

config wifi-device 'radio0'
	option type 'mac80211'
	option hwmode '11a'
	option path 'pci0000:00/0000:00:00.0'
	option legacy_rates '0'
	option __toggle 'Enable'
	option htmode 'VHT80'
	option channel 'auto'

config wifi-iface 'default_radio0'
	option device 'radio0'
	option mode 'ap'
	option ssid 'wifi-5ghz'
	option encryption 'psk2'
	option network 'lan'
	option key 'password'
	option disassoc_low_ack '0'

config wifi-device 'radio1'
	option type 'mac80211'
	option path 'platform/ahb/18100000.wmac'
	option legacy_rates '0'

config wifi-iface 'default_radio1'
	option device 'radio1'
	option mode 'ap'
	option ssid 'wifi-2bg'
	option encryption 'psk2'
	option key 'password'
	option network 'lan'

config wifi-iface 'wifinet0'
	option device 'radio0'
	option mode 'ap'
	option ssid 'wifi-2bg-guest'
	option network 'lan'
	option encryption 'psk2'
	option key 'password'
	option wpa_disable_eapol_key_retries '1'

config wifi-iface 'wifinet1'
	option device 'radio1'
	option mode 'ap'
	option network 'lan'
	option key 'password'
	option encryption 'psk2+ccmp'
	option ssid 'robots'
	option disabled '1'

config wifi-device 'radio2'
	option type 'mac80211'
	option hwmode '11g'
	option path 'platform/ahb/ahb:apb/18100000.wmac'
	option htmode 'HT40'
	option channel 'auto'

config wifi-iface 'default_radio2'
	option device 'radio2'
	option network 'lan'
	option mode 'ap'
	option key 'password'
	option encryption 'psk2'
	option ssid 'robots'
	option disabled '1'

config wifi-iface 'wifinet5'
	option ssid 'wifi-2bgn'
	option encryption 'psk2'
	option device 'radio2'
	option mode 'ap'
	option key 'password'

You should start with a clean config...
Looks like you have upgraded from ar71xx to ath79 with keeping settings, right?

Do at least:

mv /etc/config/wireless /etc/config/wireless.bak
wifi config

And add your changes as needed to the new generated wireless config file.

Looks like you don't have legacy rates enabled for your 2.4 network. That might be the culprit?

Thanks for this @juppin!

Turns out I should've been using HT20 instead of HT40 on my radio2 this enabled all my older devices to connect without issue. I wasn't able to discover this until backing up my current config and using wifi config as you suggested.

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