The CC1101 setup, receive decoding, radio task and frequency scan move out
of Somfy.cpp, and their types out of Somfy.h into Transceiver.h, which
Somfy.h includes. The code is unchanged apart from the bit length the
radio was set up for: bit_length becomes radioBitLength, shared with the
remotes that send without one.
The radio's fromJSON stays in Somfy.cpp for now so the JSON parsing can
move into one file: ArduinoJson costs flash in every file that uses it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
