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@Nagarjuna-Reddy I can't test this right now, but first I think you need to remove the sdcard module as it will likely be managing the registers:
rmmod mtk_sd
Then I expect you can use the GPIO like so:
gpioctl dirout-high 22
gpioctl get 22
gpioctl dirout-low 22
gpioctl get 22
cat /sys/class/gpio/gpio22/value
@shironats Sorry I am a man of many faults and failure to attach attachments is one of them 
https://community.onion.io/topic/2595/how-to-flash-uboot-after-full-erasing?_=1610672742832
@shironats Check out this thread, it's a bit extreme but might be useful. Personally, I think a dock is the best option, when you're doing experimental stuff you break things, so it's important to have the right tools at your disposal to be able to fix stuff.
Being able to use the serial console is pretty important because it helps you understand exactly what is happening.
@jonty So your server is now bound correctly, so now look at the client. Did you update the client code to use the specific port 9090?
lsof is not installed by default, you need to install it:
opkg install lsof
If this fails then you need to update your distfeeds. Edit /etc/opkg/distfeeds.conf uncomment lines 2 and 5. Run opkg update; opkg install lsof
But since your server will now bind correctly you don't need lsof
@jonty I would suggest you use a specific ip address and a sensible port number to listen on.
I would use 127.0.0.1 and port 9090, by doing so you know exactly which ip you are listening on.
What terminal commands are you trying to use to kill processes?
@shironats My guess is your u-boot is failing so the device is crashing, probably caused when your firmware flash failed. Have you connected to a terminal to see what if anything is occuring? I guess you'll need a dock for that so probably not.
@Koos-du-Preez If you have a lot of packages to update maybe you should be use oupgrade to ensure you are on the latest build.
@Andriy-Malyshenko You can download OpenWrt 19.07.5 from the OpenWrt site:
You don't get some of the Onion developed components but you can always install those yourself.
@column-column OpenWrt doesn't have man pages nor a man command. The maintainers have not created man pages for the platform.