This chapter covers hardware related topics around OpenEMS Edge. It describes how physical hardware is abstracted using Natures, how standardized physical connection layers and protocols are implemented using Bridges and shows which Devices and Services are implemented. The chapter concludes with a development tutorial on how to implement a device.
Physical hardware is abstracted in OpenEMS Edge using Natures. A Nature defines a set of characteristics and attributes which need to be provided by each OpenEMS component that implements it. These characteristics are defined by Channels. For example an implementation of an
Ess (Energy Storage System), needs to provide an
Soc-Channel (State of charge of the battery).
Technically Natures are implemented as OSGi API Bundles.
An Energy Storage System is an integrated system with battery and battery inverter.
A symmetric, controllable Energy Storage System.
A solar charger that is connected to DC side of an energy storage system.
A charging station for electric vehicles like e-cars and e-buses.
One or more digital outputs or relays.
To simplify the implementation of hardware that is connected via certain standardized physical connection layers and protocols, those are implemented as Bridges.