After some days of reverse engineering radio network parameters and protocol, I created a GitHub repository that may be of interest to anyone who wishes to control Arduino-based platforms with one of the more recent, albeit discontinued, RF-based Logitech Harmony remotes. The project relies on an nRF24L01+ chip and the RF24 library to read the packets directly from the Harmony remote, bypassing the Harmony Hub. See Minimal Arduino sketch for receiving commands from a Logitech Harmony remote (github.com) if you find this interesting.
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