Irrigation system, ESP32, power supply and pump issues | Cybergarden part 3

After laying out the concept, installing a hydroponics system and souring all the parts it's time to put everything together and test the pump. Beside pump issues I ran into a rainstorm while assembling the ESP32 and the relais card for the IoT connected cybergarden.

[firefoxik]

Centrifugal pump has no abilities to suck air, unless you use vane pump or so. This pump has to be primed to work. Once primed, no need for valves, just keep both ends above the water level, pump will be able to pump water up and gravity will keep the pump primed.