This application is designed to focus purely on providing a GraphQL interface for a Brewing Controller, as such, it is heavily opinionated and focused on simplicity of interacting with.
Note: This is my first time writing in Go, so I am probably making mistakes for which any feedback is appreciated
I've taken the approach of using packages for isolation
The graph package defines the GraphQL API, it is written in a Schema First approach using 99Designs/gqlgen
The device package contains the mental model of objects, these are persisted to the database, so things like settings, temperature controllers, PID settings, switches and so on live in this package.
The hardware package represents the physical layer to the hardware, data in this layer should not be persisted to the Database, however, it can be queried from GraphQL for configuration.
A TemperatureController represents a series of objects that can be used to control one or more outputs to control temperature. It can have 1 or more TempProbe devices (that each relate to one TemperatureProbe hardware device), the PIDSettings struct is used as a Heating and Cooling configuration, the ManualSettings struct allows manual override of outputs, and HysteriaSettings allow the basic temperature controller technique of turning on/off outputs when the temperature hits a certain boundary.