A greenhouse controller
This project aims to control and automate all aspects in a theoretical greenhouse that has a number of sensors, which provide information regarding the environment and act on a number of devices as a reaction to changes in its environment.
To begin designing, connecting, and programming our controller, let's begin by clearly setting out what we expect of such a system by creating a simple list of the functions it should accomplish.
The controller requirements
In general terms, the controller should monitor and control the most common variables that could affect such an installation:
Air temperature
Soil humidity
Direct solar lighting
Secondly, the controller will also offer an alarm mechanism that could be manually triggered by a person inside the greenhouse in case of an emergency.
Modular design
To accomplish the previous requirements, we will divide the complete greenhouse controller into four main different modules or subsystems:
Temperature: It is perhaps the most important...
