Green Fingers Water your plants automatically with Raspberry Pi! Material Raspberry Pi Water pump (https://www.amazon.de/dp/B01DDNXEKI/ref=pe_386171_37038021_TE_3p_dp_1) Relay (https://www.element14.com/community/docs/DOC-70584?ICID=piFacedigitalmain-topban) Design 3D Printable module for 20L Bottle