Datecs DPP-250 – Print web page via bluetooth connection from mobile device

We have a web application wrote on Angular and we want to print the screen from mobile device via Bluetooth connection with Datecs DPP-250 thermal printer. I’ve printed a web page from the PC via USB connection but can’t make it work via Bluetooth from mobile device.
I have tried many apps which uses the ESC protocol but when I try to print, the app says its printing and the printer’s Bluetooth light is blinking but nothing happens.

Source: Angular Questions