my old rain man irrigation controller died the display due to missing IP 65 protección and I would like to buy a new 24VAC controller for 6 valves that doesn’t cost a fortune
i guess if they have wifi for Alexa they should work
Netro Controlador Inteligente de riego, WiFi, Tiempo Aware, Acceso Remoto, 6 Zona, Compatible con Alexa https://amzn.eu/d/6PQD1tH
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Interested in a DIY build?
I highly recommend open sprinkler, its been super reliable and stable, easy to configure, and it integrates really well with HA via HACS.
there is also a new feature where you can pause the retic, its not in the latest integration yet… but will be coming soonish…
Which king of material we need for opensprinkler?
sorry i dont understand what you are asking?
Sorry. I believed that it was only software.
its hardware with opensource software, i have the v3.2 DC hardware connected to the standard 24vac solenoids, it works very well
I went with ESP32 relay board and power supply based on your needs. Using ESPHome irrigation controller on it. Cost for 8CH board was ~20€.
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I would like to have the relays from a ip65 kit because it’s humid, so no Arduino hardware
I went with IP54 for my sub $10 esp(home) build. 
Obviously you could also do something like that with a IP65 box but that may raise the total project costs over the $10 mark 
I have the 55€ inkbird controller here but it is not supported by Hass as far I can see that, so better can go for the esp32 relais and burry them in epoxy
Are you planning submerging your relays and electronics or why isn’t a cheap IP54-67 box a choice for you? 
For a conformal coating often a type of (very) liquid silicone is used which is applied as a thin film on the whole pcb. This has a quite some advantage over “ordinary” epoxy which may start to deform/crack over time and in general tends to “age” quicker and being more sensitive to heat 
good advice, thanks,
the last year’s 22 years I bought several rainbird and other controller that all died from humidity
but I was adviced that coating PCB with plastic spray from Kontakt Chemie is better and cheaper than epoxy also I have a well protected bulky 24VAC transformers now, so I will try the 4 channel esp32 board with HA
Hi everyone I just found this device based on Esp32 including 6 Relais in a nice industrial housing and good price.
Do you think it would be a good base to build 6channel irrigation Controller for 24AC valves?
Why not? As long it runs esphome 
You also find this type of tuya 4channel switches based on some beken chip (compatible with esphome) for less than $10 on ali. They have a DC Version (max 32VDC) and an AC version (max 240VAC). The case is even din-rail mountable 
(and can be easily open to initially flash esphome via serial)
