I have finally received a detailed response regarding my issue. The fact is that the Carpe Iter controller cannot be used with Android Auto or CarPlay. The commands work perfectly on the mobile phone, but due to a limitation, they are not forwarded to Android Auto or CarPlay.
Here is the detailed response from Carpe Iter:
Hi Massimo,
I completely understand why you wanted to add it to your setup, operating a touchscreen with thick motorcycle gloves is exactly why we created our controllers.
However, the behavior you are experiencing is due to a strict system limitation of Android Auto and Apple CarPlay.
Why is this happening?
The Carpuride W702S Pro is essentially a projection screen for Android Auto / Apple CarPlay. These platforms are completely locked down by Google and Apple. Our Carpe Iter controllers connect via Bluetooth to your phone and send commands to the phone's native operating system. Unfortunately, Google and Apple do not allow third-party Bluetooth controllers to pass screen interactions (like panning or zooming a map) from the phone through to the projected display on the Carpuride.
Because of this block in the Android Auto/CarPlay architecture, the inputs are registered on your phone's screen, but they are not mirrored to the Carpuride screen.
Sadly, there is no workaround, app, or setting that can bypass this restriction. It is a limitation baked into Android Auto and Apple CarPlay themselves.
To get the full functionality of the Adventure Control (panning, zooming, app switching), the controller needs to be paired with a device running a full, native Android operating system mounted on your handlebars, such as a Caretta or CiPad.
Best regards,