Mooncatanswered grow question 2y ago I'm currently using the Gardena vacation watering system, and it's working pretty well. (+Blumat moisture meter, but that's not necessary)
You can also easily build one yourself with these DIY parts from Amazon and a water pump (+water reservoir, etc.), it comes out the same.
If you don't want to give up manual watering for control, get yourself a Gloria 5L; the extended watering arm helps a lot.