Allow integrated printer with you site !

Support printer connection types :
Bluetooth
WiFi / Lan
USB (requred harware with OTG)

Support generic printer models with command subset:
ESC @ - initialize
ESC t - Switch character table
GS v 0 - Print an image using the older "bit image" command.

Android >= 4.0:
Plain text
Images

Android >= 5.0:
PDF
Print Service