How to connect printer (Star TSP100) with USB only

[Choul]

I am struggling with connecting ipad (also Android tablet) with the printer (Star TSP100) with USB, not Bluetooth and Ethernet. However, following some steps to add USB printer to an Android tablet, I am yet printing. Screen message shows 'please make sure the printer is connected and try again', whenever I tried printing.  I am very appreciated if anyone helps me.  

[Gabbi]

Hi! As I know the iOS device doesn't support usb printer. For Android tablet is very important that usb printer respects the protocol epson esc-pos. So I suggest to switch the setting from Star esc-pos to Epson esc-pos. There should be detailes about protocol in the printer manual.