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+--- Thread: typeerror: 'str' does not support the buffer interface (/thread-6252.html)
typeerror: 'str' does not support the buffer interface - rdirksen - Nov-12-2017
I have a very simple program to write a (HEX) string to a USB device
import serial
while True:
ser = serial.Serial(port = '/dev/ttyUSB0', baudrate = 9600, bytesize = serial.EIGHTBITS, parity = serial.PARITY_NONE, stopbits = serial.STOPBITS_ONE, timeout = 10)
response = []
ser.write("\x07\xF0\x00\x0F\x00\xBC\x07\x0F")
response.append(ser.read().encode('hex'))this runs fine in Python 2.7.9 but in version 3.4.2 I get the error message"TypeError: 'str' does not support the buffer interface"
what should I modify in the .write command to avoid this problem?
RE: typeerror: 'str' does not support the buffer interface - rdirksen - Nov-12-2017
the complete errormessage:
Error:Traceback (most recent call last):
File "/home/pi/whr-control/ventserver.py", line 15, in <module>
ser.write('\x07\xF0\x00\x0F\x00\xBC\x07\x0F')
File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 475, in write
n = os.write(self.fd, d)
TypeError: 'str' does not support the buffer interfaceRE: typeerror: 'str' does not support the buffer interface - heiner55 - Nov-12-2017
Maybe you need a byte string b"............":
ser.write(b"\x07\xF0\x00\x0F\x00\xBC\x07\x0F")
RE: typeerror: 'str' does not support the buffer interface - rdirksen - Mar-11-2018
yeah that helps.