In order to control how a closed system works you need to sense chosen changes in the system and modify those changes to your requirements. Sensors and actuators provide that control coupled with computer applications connecting the two together according to predetermined rules. Here are some of the practical goodies, Temperature / Humidity sensor, light sensor, Ph sensor, Base shield, for the attachment of actuators to the microprocessor control, grove connectors and a small prototyping board. until the system is working I’m holding fire on getting the Co2 sensor as it’s quite expensive. Could be that the v2 version of the Gro-bot has a superior sensor ???
Proposed power supply. If not beefy enough will add another !!