问题
I need to develop the ionic android app which needs to be integrate with POS printer via USB. I was able to do the same with Bluetooth but when it come to USB connection i am totally zero on this.
I hope some one can help me out. I tried with https://ionicframework.com/docs/native/serial/ but no idea how this one gonna work.
来源：https://stackoverflow.com/questions/48395373/ionic-2-print-function-to-pos-printer-using-usb