monitor_mihome now works with auto join and switch toggling

Can now construct a device class instance from its product_id

legacy.py rewritten to use new device class interface

Tested on Raspberry Pi, all 4 testers still work with new Message()

Improved debug output for testing

Ran all test cases again (no hardware), fixed a few issues. ...

Need to still run this up on the hardware to test properly

Major tidy up of test harness and lifecycle methods

Commissioned a tx path for MiHome adaptor Plus. ...

This is a temporary path, but it generates the correct message

Placeholder added to architecture for radio interface adaptors

Documented requirement for a simple persistent data store for the Registry

Method signatures for device classes added

Noted the layering of switching between tx/rx might be sub optimal

Renamed new radio2 module as radio, and removed old code

Removed legacy direct-to-SPI interface. ...

This code now does FSK tx/rx and OOK tx from the same driver.

FSK Transmit coded, ready for test

radio2.py offers temporary spi interface for radio.py ...

Tested on mac only.

Preparations for new radio interface added to the architecture

Started to write another test case to blurt out OOK energenie messages. ...

This is only a test case.
But it has highlighted a whole load of discrepancies in the original C
code to do with payload length calculation, and the 'magic' zero byte
at the start of the buffer for stuffing the SPI register address in.

Baud rate for OOK increased to 4800bps to bring in line with latest Energenie builds. ...

Sync pattern now recognised correctly as 0x80,0x00,0x00,0x00
Switching is eratic, but learning always learns.

Added green LED around transmit and receive transactions. ...

This is useful for measuring total on-air time on logic analyser

Pre-factoring work done prior to pushing more code into the C domain.

Tweaked payload format further. ...

Reset all devices and re-learnt the house code
Can now switch all devices on and off, together, and independently.
legacy.py test code now demonstrates this in a loop

Renamed modulator as encoder

7 legacy adaptors now turning on and off with this trimmed code

Improved reliability of syncing of OOK messages

Got old code working again. ...

Looks like the extra bytes inserted by the buffer bug actually make it work.
This is probably related to sync bytes

Merge branch 'master' of https://github.com/whaleygeek/pyenergenie

Brought back old test code that was working

More experiments with payload timing

Corrected sync preamble. ...

Brought in original legacy C code for reference