On 2016年04月26日, David Aldrich <David.Aldrich at EMEA.NEC.COM> wrote: > #!/usr/bin/python3 > import serial >> ser=serial.Serial('COM1',115200) > while True: > out = ser.read() > print('Receiving...'+out) >> When I run it and send data for it to read I get: > Traceback (most recent call last): > File "serial_read.py", line 9, in <module> > print('Receiving...'+out) > TypeError: Can't convert 'bytes' object to str implicitly Try this: print('Receiving...',out) If you want to convert the bytes you read from the serial port into a string, you need to decode they bytes (and you have to specify what encoding to use): print('Receiving...' + out.decode('ascii')) If you google 'Python 3 bytes strings' you should find a bunch of info: https://docs.python.org/3.5/library/stdtypes.html http://www.diveintopython3.net/strings.html http://pythoncentral.io/encoding-and-decoding-strings-in-python-3-x/ https://www.safaribooksonline.com/library/view/fluent-python/9781491946237/ch04.html -- Grant Edwards grant.b.edwards Yow! I haven't been married at in over six years, but we gmail.com had sexual counseling every day from Oral Roberts!!