Dev/playground

[jo-bru]

As mentioned before, this is only the first simple draft of the system.

New key-features to look at are:

• Dynamic/flexible protobuf message structure using oneof field types (see _lineprotocol.proto file)

• Driver handling with driver-subfolder structure (only implemented for one simple driver: _digitalgeneric)

• For simplicity, an automatic driver initialization is implemented in Makefile to generate template driver files/sections => not complete

The following features have yet to be implemented:

• [x] Feedback message handling: implement string type message handling on MCU

• [x] Profile management:

1. Save all registrations (possibly in vector type)

2. Create configuration list (MCU port/pin <=> profile_id) mapping -> used to avoid overlapping registrations

• [x] Non-volatile storage: save registrations on SD card => re-initialize on reset

• [x] Drivers: implement/adapt other drivers for edge devices

• [x] Polling/Event-Driven: implement registrations for event-driven profiles

• [x] Automatic driver initialization: add section insertion for .proto and main.cpp files

[iomz]

Once all the comments are resolved by @jo-bru , I'll approve this PR.