this post was submitted on 19 Jul 2023
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homeassistant
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Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
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Buy a relay board and an ESP8266/32, flash Tasmotaon it (or them) and you're done! You can control them with HA through MQTT.
Yeah, that’s the easy part. But what valve? How to power the valve plus the esp board? Waterproofing? Those are the tricky parts.
For the valve, any garden irrigation valve will do. If you have a DIY shop (sorry, I don't know how're they called, here are Brico) you can buy and ask for suggestions there. If you don't have power at all there well...maybe a latch valve and an EAP32 with deep sleep code can last a few months (I guess, I've never tried that). For the waterproofing, the valve should already be waterproof, for the circuits you can buy an IP 65 electric junction box. Easy? Maybe not, but when it works, it feels good!!! :)