I receive data with an Raspberry Pi3 from another device with an ATMEGA 8 Chip via serial port, what I receive should look like : #00 341 341 332 13123 R-? ... But what I receive on my Raspberry is: b'\xff\xfa\xfd\xff\xff\xff\xff\xff\xff\xfd\xff\xea~\xf8\xff\xfe\xfe\xff\xd5\xff\xfe\xfd\xff\xff\xfd\x...