ge0rg, I got a no-name thermal-print toy camera (named "Q5"), with no obvious tech specs to look for. Anybody got one and opened the case or reverse-engineered the app?
It has "wireless printing", where it shows a QR code pointing to https://www.pgyer.com/UNhf - with bloated YinTiBao apps for Android and iOS. It does not have WiFi, but appears as a #Bluetooth #BLE device named "BQ05".
On USB it provides storage or UVC:
ID 0219:3280 Generic GENERAL - AUDIO