Hi All, I want to connect Nitgen fingreprint device to my Arduino Leonardo. is it possible? i tryied to connect it from usb pins red -> 5v, black -> gnd, green -> rx, white -> tx but it does not recognize the device any suggestions?
USB is not at all the same as Async Serial. To connect a USB device to the Arduino UNO you need something like a USB Host Shield.
can i use pl-2303 converter? my nitgen device is Nitgen HFDU14
ribhoo: can i use pl-2303 converter? my nitgen device is Nitgen HFDU14
That is for connecting a serial port to a USB Host. It won't help you connect a USB Client to a serial port.
If you don't mind hacking the device you may find something like the PL-2303 chip inside it. If you remove that chip and connect wires to where the RXD pin (pin 5) and TXD pin (pin 1) were you can probably connect THAT to the Arduino.