i2cdetect is part of the package : i2c-tools and part of the Debian packages.
The I2C device scan you ran from the plugin did work. It said that if found a device at address 3d. You found an error because the message said undefined instead of the bus number. I’ve fixed this just now, so thanks for reporting it. Thanks to Bart this plugin should work fine on the latest version of volumio because I’ve changed the install script 
The install script for my plugin installs it anyway (if it’s not already present) The device scanner works from in the plugin but has a bug where it displayed “undefined” instead of the bus number. I’ve fixed that issue too. Cheers!
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I will check tomorrow if the script will work on a fresh Volumio 2.882-2021-04-24, as MPD_OLED had issues installing with the updated libraries.
For now i tested Volumio 2.873-2021-02-19, and found it works.
and to show off my build:
Temp. internal connections.
Front View with test display I2C 1.3 inch Blue Oled.
All obsolete connector holes filled with compound and painted it black.
Only waiting on my bigger screen : 2.42 inch White OLED SPI/I2C
Nice! I have some of those 2.42 inch screens! They’re great
Hi,
This 2.42 inch oled display is compatible with this plugin?
Regards
Yup, I use a 2.42 inch OLED with the plugin. It’s not the plugin that implements the display functionality, it’s the mpd_oled software itself. Works well.
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Do you have any tips how to drive this screen, SPI or I2C ?
I2C defo!
I tested the build with the latest version of Volumio ( 2.882 )
while executing : volumio plugin install the following error is generated in the MPD_OLED bit.
The following information may help to resolve the situation
The following packages have unmet dependencies:
build-essential : Depends: gcc (>= 4:4.9.1) but it is not going to be installed.
Depends: g++ (>= 4:4.9.1) but it is not going to be installed.
Depends: dpkg-dev (>= 1.17.11) but it is not going to be installed.
I am guessing this has nothing to do with your code, but more with the code of @Adrii .
For now, if you want to use this or Antiprism OLED plugin use the Volumio 2.873-2021-02-19 version.
Which i made a link as Volumio does not maintain history downloads
Hi Bart
The issue only affects building from source. I also provide a binary mpd_oled package for Volumio (to install and configure from the command line), that should not be affected this issue
mpd_oled/install_volumio2_deb.md at master · antiprism/mpd_oled · GitHub
Adrian.
The master @Adrii has spoken! Yeah, go for the latest version of mpd_oled from GitHub and the plugin should still work fine.
UPDATE: I’ve changed the plugin to install the binary version to get around the build issue - let me know if it works please @Bart
I did see on mpd_oled GitHub page that there were build issues on the latest version of volumio. Adrian has raised it with the Volumio team but I don’t know how close they are to fixing it.
I do intend to do another version of the plugin that works with Volumio 3…
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Hi @supercrab ,
my test:
Raspberry Pi 4 B 2GB + I2C 1.3 inch OLED display.
Volumio version : 2.882-2021-04-24
Install routine used as always:
wget https://github.com/supercrab/volumio-plugins/raw/master/plugins/miscellanea/mpd_oled/mpd_oled.zip
mkdir ./mop
miniunzip mpd_oled.zip -d ./mop
cd ./mop
volumio plugin install
volumio vrestart
cd ..
rm -Rf mop
rm -Rf mpd_oled.zip
I am getting a lot of:
Err http://archive.volumio.org/raspbian/ jessie/main <FILENAME> Unable to connect to archive.volumio.org:
Where "“FILENAME>” is various libraries.
I am not a programmer, but am a system/network admin so i can ensure you i do not have issues with my network nor connection to the volumio site at the time of install.
PS; if you are going to develop/test for Volumio 3, i am willing to help test, current own and ready to test with : Raspberry Pi 2B 1GB / Raspberry Pi 4B 2 GB / Raspberry Pi Zero W. with 1.3 and 2.4 inch Oled and I2C interface for LCD/VFD displays.
Addition to the previous post:
After running @supercrab script and mpd_oled failing, i went onto the github page of @Adrii and used his script:
wget -N http://pitastic.com/mpd_oled/packages/mpd_oled_volumio_install_latest.sh
sudo bash mpd_oled_volumio_install_latest.sh
At first i had some fears as i got a few connection timeout on the Pitastic.com link (only with the wget link, via the browser i could access the script )
3th try it downloaded the script and after executing the script all went fine.
The install script went through without any errors, then i returned to the MPD_OLED configuration page within Volumio, pressed SAVE and the error was gone and the display works.
I hope we do get a bit more configuration options for the screen output, as i like to see a bigger STOP clock without an IP and date bar. And a better ( bigger ) artist/song display in the PLAY screen and maybe no clock.
I forgot to update the zip file in my repository, it should be sorted now and the install script with download the binary version of mpd_oled.
As for configuring the screen it might be easier to change the code yourself. The code is pretty straight forward and should straight forward to remove stuff. The trouble is mpd_oled won’t build on the latest version of Volumio so you’ll have to wait until those issues are sorted.
The code works on the latest version of Volumio to date (882).
I had to revert back to the Volumio 2.873 version as i also use the Saiyato Audiophonics PWR-manager, which fails to compile under version 882.
As for the changes to to code, as i said i am not a programmer so i am at a loss where to look, let alone change code.
If you, or anyone reading this, has some pointers ( what file(s) and which sections ) to look for.
Ther’s a way to edit “display.h” settings file after or before plugin installed?
in master mpd_oled release from antiprims i edited some file to remove clock from display and make graph bar full size…
and… spectrum doesn’t work with external source like spotifyconnect.
any suggests?
thanks
No, because mpd_oled is now a binary file and it is not built as part of the installation.
You could always try compiling your version of mpd_oled and running cp mpd_oled /usr/local/bin/mpd_oled to copy it to the bin folder and the plugin will use that version!
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Thanks you, some way to edit this binary installation.? or use source code and update it without remove it and reinstall all?
You can’t edit a binary, you can only recompile.
You can get the source code and compilations instructions here. I did not create this project so you’ll have to follow the instructions to build it 
I haven’t looked at this in a while but you don’t need to uninstall the plugin.