Is it possible to control a Yamaha Arius Piano with Exquis

Total MIDI noob here. Is it possible to have the buttons on the Exquis to play notes on a Yamaha Arius YDP-S54B piano through the « USB TO HOST » port on the piano? I have a USB-C to USB-B 2.0 MIDI cable that I have successfully used with some Android MIDI apps and the piano.

Hello,
I don’t think so, this « USB to host » plug seems to be an output. You would be able to use Exquis with it if there were a MIDI input (usually a DIN plug)

I am able to send notes from iOS and Android MIDI apps to the piano through the « USB to Host » port.
Specifically from Musix Pro - Isomorphic MIDI Music Instrument.
The notes I play in the app are played on the piano as if i was playing the note on the piano itself.

Hmmm… in that case maybe it could actually work?
Just wondering if it could power the Exquis enough, in the worst case you would need to use a Y cable to both power Exquis with an external power source (powerbank, USB charger…) and send MIDI data to the piano.

The piano itself does not supply power. I have two different usbc dongles that are both able to power the Exquis and allow an additional usb connection to the piano. When connected this way the piano seems to ignore any key presses on the Exquis.