0.1.1 - Workaround for UID (use Alfa's mac address)
STILL IN DEV PHASE: NOT TO BE USED YET
CHANGES:
- added getmac dependency
- Added function to get mac address of the alfa
- UID will be set to mac address of Alfa (not ideal, but we have no s/n via modbus)
- Removed slave_id / base_address