Orangepi Zero as USB printer

deepu

I wolud like to use orangepi zero as USB printer via OTG


(i) Host machine (Windows/Ubuntu) must detected as printer when connected throgh OTG USB port of OPi zero
(ii) Need to save all the print requsets in PDF
(III)Email the requests to cofigured email id
(IV)Inititae print to actual printer connected to OPi zero


I could detect  OPi zero as g_printer in host machines but cannot read any requsets from host

deepu

please help