LCD display and buttons in Python (tutorial and code)

[hondagx35]

Hi mecaz,

please post your mpdlcd.service unit file.
The logs you have posted are not complete (lines are cut at the end)!

Frank

[mecaz]

Hi mecaz,

please post your mpdlcd.service unit file.
The logs you have posted are not complete (lines are cut at the end)!

Frank

My debug code: http://pastebin.com/mLxDscSZ



My journalctl: http://pastebin.com/x9ckRE2x

[hondagx35]

Hi mecaz,

Code: Select all

Feb 22 15:40:18 runeaudio python2[204]: Traceback (most recent call last):
Feb 22 15:40:18 runeaudio python2[204]:   File "/root/RuneAudioLCD/start.py", line 108, in <module>
Feb 22 15:40:18 runeaudio python2[204]:     mpdcl = mpd_client.mpd_client(CON_ID, PASSWORD)
Feb 22 15:40:18 runeaudio python2[204]:   File "/root/RuneAudioLCD/mpd_client.py", line 13, in __init__
Feb 22 15:40:18 runeaudio python2[204]:     if (self.mpdConnect(self.client, con_id) == False):
Feb 22 15:40:18 runeaudio python2[204]:   File "/root/RuneAudioLCD/mpd_client.py", line 61, in mpdConnect
Feb 22 15:40:18 runeaudio python2[204]:     except SocketError:
Feb 22 15:40:18 runeaudio python2[204]: NameError: global name 'SocketError' is not defined
Feb 22 15:40:18 runeaudio systemd[1]: mpdlcd.service: Main process exited, code=exited, status=1/FAILURE
Feb 22 15:40:18 runeaudio systemd[1]: mpdlcd.service: Unit entered failed state.

AGAIN:
please post your mpdlcd.service unit file.

Frank

[mecaz]

Hi mecaz,

Code: Select all

Feb 22 15:40:18 runeaudio python2[204]: Traceback (most recent call last):
Feb 22 15:40:18 runeaudio python2[204]:   File "/root/RuneAudioLCD/start.py", line 108, in <module>
Feb 22 15:40:18 runeaudio python2[204]:     mpdcl = mpd_client.mpd_client(CON_ID, PASSWORD)
Feb 22 15:40:18 runeaudio python2[204]:   File "/root/RuneAudioLCD/mpd_client.py", line 13, in __init__
Feb 22 15:40:18 runeaudio python2[204]:     if (self.mpdConnect(self.client, con_id) == False):
Feb 22 15:40:18 runeaudio python2[204]:   File "/root/RuneAudioLCD/mpd_client.py", line 61, in mpdConnect
Feb 22 15:40:18 runeaudio python2[204]:     except SocketError:
Feb 22 15:40:18 runeaudio python2[204]: NameError: global name 'SocketError' is not defined
Feb 22 15:40:18 runeaudio systemd[1]: mpdlcd.service: Main process exited, code=exited, status=1/FAILURE
Feb 22 15:40:18 runeaudio systemd[1]: mpdlcd.service: Unit entered failed state.

AGAIN:
please post your mpdlcd.service unit file.

Frank

My mpdlcd unit file :

/usr/lib/systemd/system/mpdlcd.service

Code: Select all

[Unit]
Description=RuneAudio I2C LC-Display
After=mpd.service

[Service]
ExecStart=/usr/bin/python2 /root/RuneAudioLCD/start.py
TimeoutSec=0
Restart=always
RestartSec=1
StartLimitInterval=30
StartLimitBurst=20

[Install]
WantedBy=multi-user.target



[mecaz]

Hello,

I started over. flashed rune image again. and loaded RuneAudioLCD script.
I also edited mpdlcd.service unit file as "RestartSec=1" to "RestartSec=5" and now my lcd starts at boot.
I am using xbindkeys and airmouse to control mpd.

And want to ask that is there any command to change lcd display info.
I mean now my lcd shows Artist - Title, I saw at youtube they can change that to eplased time/total time or ip adres or system load..
how can i change displaying info? which command should i use?

Regards

[Cirrhosis]

Sorry for my late response, I wasn't here on the forum for a while.

Hello!
I have Raspberi Pi B rev.2 and 2B. Also, there is a simple display 16X2 and 16X2 bus i2c. I tried to do by steps as described XPLOD. But a lot of links does not work. Linux for me to complete darkness. Does anyone have a working image of what would be written on the SD, connect the display and that everything would work? Controls not necessary.
Sorry for the English. This is Google Translate.

If you still need it, PM me and I can send you my image for 2B. Or give you some help with additional steps. Which links doesn't work?

Hi.
Excuse me. I went for a long time.
I do not have the file usr / lib / python2.7 / site-packages / Adafruit_GPIO-0.9.3-py2.7.egg / Adafruit_GPIO / MCP230xx.py
What to do?

[XploD]

Sorry for my late response, I wasn't here on the forum for a while.

Hello!
I have Raspberi Pi B rev.2 and 2B. Also, there is a simple display 16X2 and 16X2 bus i2c. I tried to do by steps as described XPLOD. But a lot of links does not work. Linux for me to complete darkness. Does anyone have a working image of what would be written on the SD, connect the display and that everything would work? Controls not necessary.
Sorry for the English. This is Google Translate.

If you still need it, PM me and I can send you my image for 2B. Or give you some help with additional steps. Which links doesn't work?

Hi.
Excuse me. I went for a long time.
I do not have the file usr / lib / python2.7 / site-packages / Adafruit_GPIO-0.9.3-py2.7.egg / Adafruit_GPIO / MCP230xx.py
What to do?

Did you pay attention on the versions of your Python and Adafruit? Try to go to /usr/lib and see which python version you have. Maybe you don't have python 2.7 directory but python 2.8 or some other instead. The same for Adafruit library.

[Cirrhosis]

Did you pay attention on the versions of your Python and Adafruit? Try to go to /usr/lib and see which python version you have. Maybe you don't have python 2.7 directory but python 2.8 or some other instead. The same for Adafruit library.

I'm doing it:

wget https://github.com/adafruit/Adafruit_Py ... master.zip
pacman -S unzip
unzip master.zip
cd Adafruit_Python_CharLCD-master
python2 setup.py install


obtained:

Installed /usr/lib/python2.7/site-packages/Adafruit_CharLCD-1.1.1-py2.7.egg
Processing dependencies for Adafruit-CharLCD==1.1.1
Searching for Adafruit-GPIO>=0.4.0
Downloading https://github.com/adafruit/Adafruit_Py ... GPIO-0.4.0
error: Download error for https://github.com/adafruit/Adafruit_Py ... GPIO-0.4.0: unknown url type: https

[Cirrhosis]

Did you pay attention on the versions of your Python and Adafruit? Try to go to /usr/lib and see which python version you have. Maybe you don't have python 2.7 directory but python 2.8 or some other instead. The same for Adafruit library.

Installation Adafruit LCD library:

Installed /usr/lib/python2.7/site-packages/Adafruit_CharLCD-1.1.1-py2.7.egg
Processing dependencies for Adafruit-CharLCD==1.1.1
Searching for Adafruit-GPIO>=0.4.0
Downloading https://github.com/adafruit/Adafruit_Py ... GPIO-0.4.0
error: Download error for https://github.com/adafruit/Adafruit_Py ... GPIO-0.4.0: unknown url type: https

[05x]

If you're not using an remote, you will have to use a physical button or something. You have to call 'change_screen()' method from display.py class and the screen will get changed.

At first thank you for your awesome script.
I want to call it from a button instead of IR, but a am a complete novice and don't know how to achieve this.
Maybe some of you Guys can help me, if its not too complicated.