Raspberry Pi 3 Board acting as controller in Water Management CPS

The Raspberry Pi is a low cost, credit-card sized computer that plugs into a computer monitor or TV, and uses a standard keyboard and mouse. It's capable of doing everything a desktop computer do, from browsing the internet and playing high-definition video, to making spreadsheets, word-processing, and playing games. In our works, Raspberry Pi is acting as controllers that read information from sensors and commands actuators.
In our works, we have installed four raspberry Pi at tank and one raspberry pi as master in star topollogy.