Convert received data bytes in serial to hex text

Hi now I write bytes data (for eg, **\x00\x11\x22**) from my PC to serial port of my device running unix at the ttyS1 port. I am able to print the data using either cat /dev/ttyS1 od -x < /dev/ttyS1 both works, but with cat I get "▒▒" printed. With od, i see some data bytes: 0000000 00fe 0000001 Which is not what i sent (001122Hex). How can I get the correct hex display? **EDIT**: tty permission set: stty -F /dev/ttyS1 speed 115200 cs8 -cstopb -parenb -echo time 3 min 0 **EDIT2**: Something weird is happening I am not sure why. I tried to send different data: "1049" which my program then sends as "\x10\x49". od returns: 0000000 4910 0000002 Seems it reversed the bytes. But what I don't get now is if I have repeated number like "\x11\x49" at once the data becomes corrupted. Seems like all repeated value like x11, x00, x22, are translated wrongly for some reason. And, any value over 8 also wrongly translated. Any idea why? Use either hexdump or od give same result.