Need advice on full timer

[censored]

Hey guys, I am attaching a pic of my plumbing. The tall black knob on the right is how I fill my pool. I am hoping to find some sort of battery operated timer that can replace the knob or go inline with the plumbing but all I can find is inline hose timers. Any thoughts? Thanks.

 

[atttech-2]

If you have an open slot on your sprinkler timer I would just replace the manual back flow with a sprinkler actuator and program it as a sprinkler zone. the valve should run $10 to $15 and say another $10 for glue and fittings.

 

[censored]

That has crossed my mind. I am pretty sure I have an open zone on my controller, but I would still like something with more localized control so I can turn it on without manually running that zone from the garage.