Wifi not working after installation from home-assistant / supervised-installer

Installation
1

Hello. I have installed HA supervised on RasPi 4 Debian 10 as instructed on github. I observe that when I configured wifi in supervisor, it actually looks like it only configured routing through eth0. I got two IP addresses, one for eth0 and second supposedly for wlan0, but when I disconnect cable from eth0 then wlan0 stops working and when I connect cable back wlan0 starts woring again. What can I do?

2

Have you tried configuring your (both) IP’s in /etc/dhcpcd.conf like this:

interface eth0
static ip_address=XXX.XXX.XXX.XXX/24
static routers=XXX.XXX.XXX.XXX
static domain_name_servers=1.1.1.1 1.0.0.1
static domain_search=

interface wlan0
static ip_address=XXX.XXX.XXX.XXX/24
static routers=XXX.XXX.XXX.XXX
static domain_name_servers=1.1.1.1 1.0.0.1
static domain_search=
3

Hello.That results in following configuration, but only eth0 address can be pinged when cable is connected, wlan0 does not reposnd to ping at all

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether dc:a6:32:74:f7:94 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.28/24 brd 10.0.0.255 scope global dynamic noprefixroute eth0
       valid_lft 86376sec preferred_lft 86376sec
    inet6 fe80::b981:3de:1029:f5ce/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
jan@homeassistant-rpi4:~$ ip addr show wlan0
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether dc:a6:32:74:f7:95 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.54/24 brd 10.0.0.255 scope global noprefixroute wlan0
       valid_lft forever preferred_lft forever
    inet6 fe80::9720:b38a:31a4:76fc/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4

Well, I’m afraid I don’t fully understand, what are you trying to achieve… with this configuration you set both networks to be functional and then you can switch between them by turning Wi-Fi on or off (when Wi-Fi off, Eth will take the lead and vice versa).