3
For the second part:
Doing an unattended upgrade can have interesting side-affects. As in a system failure. Not recommended. Instead, I would recommend running a periodic cron job to see what your distribution is offering.
If an apt capable system:
# In /etc/crontab Running at ferinstance 13:13 on Mondays
13 13 * * 1 root apt-get update && apt-...
2
If you are signalling a voltage level between two devices they need to have a common voltage reference.
Connect the grounds of the two Pis.
1
It is unclear what you are trying to do BUT one thing is clear:-
.bashrc is NOT intended to run scripts.
It is run each time a non-login interactive shell is started and is used to configure the shell.
~/.bashrc: executed by bash(1) for non-login shells.
1
It looks like your code file is named serial.py. Change it to something else!
If you name a file in the current working directory after a module, then Python will use that file in your current working directory than the modules installed.
1
Don't run as a limited user. Need to run the script as root or the default Pi account and all is right with the world again.
1
Following code worked for me. Prettey the same version as by "joshuar500", but with callback using:
def setup():
GPIO.add_event_detect(button, GPIO.RISING, callback=button_callback,
bouncetime=500) # Setup event pin "button" rising edge
def button_callback(channel):
sleep(0.1)
GPIO....
1
I was able to fix this by writing a custom config parser which does not require having sections. I hope that it will be useful for other readers
class ConfigParser:
def __init__(self, path, line_delimiter='=', comment_delimiter='#'):
self.path = path
self.line_delimiter = line_delimiter
self.comment_delimiter = ...
1
Issues in Android app visualization were given by a faulty network connection.
It is pretty difficult to say what happens in detail because I cannot investigate further on access point configuration and other network settings (including firewalls) active on company network since I've not network admin privileges, This's pretty frustrating. As a matter of ...
1
A systemd Unit file could do it. Try this:
rpi ~$ sudo systemctl --force --full edit slincam_menu.service
In the empty editor insert these statements, save them and quit the editor:
[Unit]
Description=Slincam Menu
After=graphical.target
[Service]
User=pi
WorkingDirectory=/home/pi
Environment=DISPLAY=:0
ExecStart=/usr/bin/python3 /home/pi/Documents/slincam/...
1
If you happen to use LightDM, the correct file to start your GUI apps before the desktop environment starts is /etc/lightdm/Xsession. If you want to configure startup differently for each user, you typically put there a line
[ -f ~/.xprofile ] && . ~/.xprofile
and then configure the startup for a given user by editing their ~/.xprofile.
1
Lines like the one below in your error log are giving you a hint:
[Sat Jun 24 12:00:53.928111 2017] [cgid:error] [pid 2640:tid 1945105456] [client ::1:54506] End of script output before headers: Testled2.py /usr/bin/env: python3: No such file or directory
By saying python3: No such file or directory, they mean that either the first line of your scripts is ...
1
You can try steps mentioned below. It will take some time to make and make install. Please be patient.
sudo apt-get install qt5-default
wget https://www.riverbankcomputing.com/static/Downloads/sip/4.19.24/sip-4.19.24.tar.gz
tar -xzvf sip-4.19.24.tar.gz
cd sip-4.19.24
python configure.py
make
make install
cd ../
wget https://www.riverbankcomputing.com/...
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