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@luz Yes of course. Maybe dmidecode can help.

I track my device configurations using my serial number generator.

@CoffeeCat it sounds like there is an issue with your crontabs directory, assuming you have nothing in crontabs you need, you can use this command sequence to resolve the issue:

rm -rf /etc/crontabs
mkdir /etc/crontabs

Then try starting again at crontab -e

BTW instead of :wq command you can use ZZ to save and quit.

@luz try ubus call system board

    "system": "MediaTek MT7688 ver:1 eco:2",
    "model": "Onion Omega2+",
    "board_name": "omega2p",

I use /proc/cpuinfo to identify Omega2S vs Omega2S+ in my software.

I saw the dock a couple of weeks ago, seems like a good idea but personally I prefer discreet functional expansions.

@Pavel-Negrobov assuming you are using dhcp could check if you have a valid ip on that interface with ubus call network.interface.wwan status and examine the "ipv4-address.address"

@Pavel-Negrobov I don't know any way of actually checking the WiFi is successfully connected since UCI just changes the configuration. I just try to programatically open a connection to a known good host and check the response code.

@CAP-33 uhttpd is installed in the standard Omega firmware build and you can add php7 support. Take a look at this link:

https://openwrt.org/docs/guide-user/services/webserver/php

I find nginx performs a lot better than uhttpd, you can see the installation details here:

https://openwrt.org/docs/guide-user/services/webserver/nginx

@Pavel-Negrobov sta shows as disabled so I'm not sure how it would be associated with anything. If @György-Farkas solution works for you you should go with that.

@ckielstra Since there is no other suggestions I have 2 thing you could look at.

1. /etc/config/fstab allows you to set up mount points with the various configs. I use one for the sdcard on my devices to set up the mount point and the file system type. The docs refer to an additional "options" option which can be used to set mount options. I expect this includes the ro option but I have not tried it.

2. The USB hotplug script is executed when you insert a USB device, you could add your own script to remount in read only mode. This is a hack you could use in the absence of a better solution.

@Pavel-Negrobov If you examine your /etc/config/wireless you will see the ssid and key are still present on the sta interface section so the device will still be associated with the ap.