When uhf rfid module connect to arduino board, pls kindly note that the baud rate can't set at a high rate, for example,if set 115200,the arduino board will not handle all the data on time, it shows all the data stuck at the port. And then, the screen will show wrong.Besides,how to set the right baud rate, we suggest you try, you could try from low baud rate,like 57600, if there is no problem,then you could use higher baud rate.
