It looks interresting… Have you implemeted some of these devices with BC modules? Solenoid valve (probably) should be controlled by Relay module. But there is also needed some power for operating solenoid valve (4 AA batteries?). Hydro generator is for me next-level feature At this moment I just want to know if water is flowing or not. This should be sufficient: https://www.ebay.com/itm/Water-Flow-Sensor-Water-Control-1-30L-MIN-Hall-Flow-Sensor-Module-Flowmeter-4-vc/232261312370?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D20131003132420%26meid%3D94fc45df73404dac88a8093336f43e18%26pid%3D100005%26rk%3D1%26rkt%3D1%26sd%3D282905631960%26itm%3D232261312370&_trksid=p2047675.c100005.m1851
I am not sure if is needed to use Sensor module to connect these sensors (Soil moisture + water flow) or if it is needed something more?
Thanks for your help