Cat Printer app
Cat Printer is Connectivity application that is open source under the GPL-3.0-only license.Cat-Printer supports some Bluetooth thermal printers of model GB01, GB02, GT01, GB03. It has cross-platform support (is also available for Linux, MacOS and Windows).
The app might ask you for background location access, which you can safely deny. (Foreground) Location permission is required for scanning Bluetooth devices in newer Android system.
