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SerialException: Could not open port /dev/ttyS0 [Errno 13] Permission denied: '/dev/ttyS0' #17
Description
Picture of the issue: https://twitter.com/sezzyann72/status/739477225637052416
It looks like permissions on /dev/ttyS0 are not set up correctly. When you type:
ls -l /dev/ttyS0
You should get the following readout:
crw-rw---- 1 root dialout 4, 64 Jun 6 10:56 /dev/ttyS0
Also,
groups
should return:
pi adm dialout cdrom sudo audio video plugdev games users input netdev gpio i2c spi
The important group to have is dialout.
This error can usually be fixed with:
sudo apt-get update
sudo apt-get upgrade
I'm opening this issue for discussion.
Activity
mahesh-sankaraiah commentedon May 29, 2018
I have updated and upgraded still it is showing
Traceback (most recent call last):
File "serial_read.py", line 11, in
timeout=1
File "/usr/lib/python2.7/dist-packages/serial/serialutil.py", line 261, in init
self.open()
File "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 278, in open
raise SerialException("could not open port %s: %s" % (self._port, msg))
serial.serialutil.SerialException: could not open port /dev/ttyS0: [Errno 2] No such file or directory: ' /dev/ttyS0'
this error what i need to do
Alisa1989 commentedon Aug 22, 2018
I had the same problem, make sure that serial port communication is enabled :)
sudo raspi-config
then
Select NO to Would you like a login console...
Select YES to Would you like the serial port hardware ...
It will then show
The serial login shell is disabled
The serial interface is enabled
mpendwavivi commentedon Feb 18, 2019
thank you alisa, it has worked for me