What is the use of controllers installing in a greenhouse and hydroponic system?

Hydroponics involves growing plants without soil, using mineral nutrients in an aqueous solution. With the help of a hydroponic controller system, the controllers make it easier for the growth of plants reducing the workflow and saving time. It involves minimal human intervention. Automated controllers besides monitoring the plant-specific parameters also control the conditions by triggering activities in associated equipment with the provision of sending notifications to the end-user. Some of these types of controllers are designed to perform tasks such as - dosing, irrigation, lighting, fertigation, climate, etc.
There are various types of controllers available which can help perform the task and give expected results.
Some of them are:
Irrigation Controller
The Irrigation Controller manages the irrigation pumps and solenoid control valves that are part of the greenhouse nutrient system.
Climate Controller
The Climate Controller provides a stress-free cultivation environment for crops by preventing a sudden change in climate conditions.
Dosing Controller
The dosing controller automates the dosing operations of your hydroponic farm. It can manage the pH, EC, Temperature [optional], and Dissolved Oxygen [optional] levels in the nutrient solution, according to the specified set values.