open garden sensor

Hi,

New here and was wondering if anyone has used the Open Garden sensor add-on for indoor gardening

https://www.cooking-hacks.com/documentation/tutorials/open-garden-hydroponics-irrigation-system-sensors-plant-monitoring/

If not, can anyone here build the Open Garden add-on. We're looking for multiple units as we begin our start up, so beginner gardeners have a way to monitor their grows. We're not asking for free but rather if someone can supply schematics or better yet build them as we need them. Thanks in advance!

Moderator: moved your request to right section and removed cross post

Does it have to be open garden stuff?

This as I've developed my own system, which is a bit more capable than Open Garden.