I guess the question is whether a Harmony One (+) can communicate with the Harmony Hub. Unfortunately, this is not possible as the Harmony One (+) only communicates via infrared.
What we can say for sure is that the remote control of the Harmony Hub is connected to the Hub via 2.4Ghz. A maximum of eight devices can be controlled via the Hub, which is the central unit. The limitation can be circumvented with a somewhat awkward tweak, provided the original remote control is available:
https://www.cnet.com/how-to...
What is easily possible, however, is that most hubs can be paired with a touch and a non-touch remote control:
https://support.myharmony.com/en-us...
I assume that the device limit of the "highest" device is used - probably 15 devices.
