lethe wrote:In short: no, it's not feasible, as the esp does not have an USB port.
I'd suggest you get a Raspberry Pi or a cheap wifi router with openwrt support.
An USB 1.1 port can be emulated. A simple Attiny can do that, look at the Digispark.
But I don't know if ESP8266 has enough power, RAM and flash to do a WiFi-USB adapter.
Just take a look at amazon or aliexpress for examle, there you can find some USB 2.0 Wifi Printserver for less than 20$, or you cabn use a cheap wifi AP which have an in tegrated printserver.
Regards,
Stéphane
I will receive tomorrow a WIFI printer server for testing .
Regards,