I have found the "serial" library no longer works in Python.2.7. I
discovered this when using Python to read and parse a serial stream from
my Arduino Uno based weather station. The Arduino listens in on 433MHz
signals from my Oregon Scientific weather station sensors and sends a
stream of weather data every minute to the web server via a USB/Serial
inerface. The web server has worked well with this system 24/7 for the
last 5-6 years and suddenly it is broken on the upgrade to
3.13.0-65-generic kernel. Downgrading the Kernel to 3.13.0-63-generic
has worked for me and also I am using Ubuntu 14.04.3 LTS as XUbuntu.
Whether it is a problem with Ubuntu or Python or Arduino, I don't know
as the latter two may have problems with how the serial interface is
initiated or maintained, and the Ubuntu may just have a higher
specification now that they can't deal with.
However my Arduino IDE downloads programs and 'listens' to the serial
stream from the Uno with 3.13.0-65-generic Ok, So my suspicions is the
broken bit is between the kernel and Python???
Here is the Python error message-
Traceback (most recent call last):
File "SerialDemo.py", line 19, in <module>
dataIn = ser.readline()
File "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 460, in
read
raise SerialException('device reports readiness to read but returned no
data (device disconnected?)')
serial.serialutil.SerialException: device reports readiness to read but
returned no data (device disconnected?)
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https://bugs.launchpad.net/bugs/1501345
Title:
linux-image-3.13.0-65-generic 3.13.0-65 breaks Python based Serial
communication
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