So I stumbled across this video and figure out that I can use my old Xperia Z2 as a media hub. MHL adapter is super cheap and I have few monitors with HDMI input. Unfortunately I have no idea how to connect mouse. Phone has totally smashed display so I can't even enable bluetooth. The only way to connect keyboard or mouse is via cable but there is no USB hub that will support MHL and OTG at the same time. DIY Perks on his video is using HDMI controller board that has two USB-C ports but the link he gave is to a bundle with a screen. I don't need a screen and it is too expensive anyway. I could buy only board but I can't find any. I can also modify MHL adapter itself. Soldering the USB cable would be easy but I have no schematics and I'm not even sure if I could just solder USB to HDMI without any special controller. Can I even do anything with this?