OLED spectrum display on Volumio on Raspberry Pi Zero W

Wheaten · October 16, 2022, 2:34pm

yep, that might cause the blinking. Had that once with a poor 5VDC connection.

Adrii · October 16, 2022, 3:05pm

Hi Chris

The correct setting for your display is OLED type 3.

The scrolling issue has previously been reported, and I included a fix to mpd_oled for it last year. The issue thread is Display flicker and frame size issue · Issue #3 · antiprism/mpd_oled · GitHub

Have you downloaded and installed mpd_oled using the mpd_oled repository? GitHub - antiprism/mpd_oled: MPD, Volumio, RuneAudio and Moode OLED status and spectrum display for Raspberry Pi (and similar)

Do you ever see the display scroll offset resetting (so that the display image jumps to the correct position)?

Adrian.

Chris3 · October 16, 2022, 3:27pm

Thank you for answer, I installed everything from the newest manual from this link „Install mpd_oled from source on Volumio 3”
I found this issue with scrolling and checked source files and I think that I have the newest version with this fix.
I observed also that if I will change dtparam=i2c_arm_baudrate= to higher baudrate for example 800000, then scrolling is faster.
I have such oled screen
517r2GBuIrL.AC_UL232_SR232,232

I connected it to 3.3V, maybe 5V will be better idea ?

Adrii · October 16, 2022, 3:46pm

The underlying problem seems to be corrupted instructions reaching the display, which is made worse by things like poor connections, longer wires and a faster bus. I don’t know if the display voltage plays a role. The screen offset should be resetting all the time, so if you aren’t seeing this then it might be worth reviewing the connections between the display and the Pi, e.g. you could try a new set of 10cm wires, inspect any soldering, etc.

Wheaten · October 16, 2022, 4:17pm

I believe the oled is targeted for 5V. Lower voltage it will draw it for somewhere else, hence the flickering.

Old_Duffer · October 16, 2022, 4:25pm

As an aside…. I did have a display working once with 5m leads.

Chris3 · October 16, 2022, 5:13pm

I soldered all the connections again and shortened the cables, unfortunately the same problem exist. Maybe the display is damaged, I will order one more and check it.
Video with screen problem

Adrii · October 16, 2022, 6:35pm

From the video, the display offset doesn’t seen to be resetting correctly.

What happens if the spectrum screen has scrolled, and then you stop the music? Is the clock screen also scrolled, or is it reset to display correctly?

Chris3 · October 16, 2022, 7:56pm

I just checked, when the song ends I see screen like this:

Old_Duffer · October 16, 2022, 8:55pm

and turning the plugin off and on again corrects things?

Chris3 · October 16, 2022, 9:15pm

after reboot everything is ok but after few minutes screen with clock and IP address starts scrolling.

Adrii · October 16, 2022, 9:17pm

Thanks for checking this. It seems like the display offset reset just isn’t happening.

I’ll have a look tomorrow and see if I can confirm the reset is still working on an SSD1306 I2C display.

Adrii · October 17, 2022, 8:20am

I tested with an SSD1306 but I have been unable to cause the offset to change in normal operation (I was previously able to do this by increasing the I2C baudrate). What I did instead was to add code to create an offset change in the display loop, and I could see this occurring and being corrected, and so I believe the previous fix for this is still working to correct changes to the offset.

You might like to try the development version of mpd_oled, as this includes different driver code and has a specific driver for the SSD1309

github.com

antiprism/mpd_oled_dev/blob/main/doc/install_volumio3_source.md

# Install instructions for Volumio 3 using source

These instructions are for installing mpd_oled using source on
Volumio 3.

## Base system

Install [Volumio](https://volumio.org/). Ensure a command line prompt is
available for entering the commands below (e.g.
[use SSH](https://volumio.github.io/docs/User_Manual/SSH.html).)

## Install all dependencies

Install all the packages needed to build and run cava and mpd_oled
```
sudo apt update
sudo apt install build-essential autoconf make libtool xxd libfftw3-dev libiniparser-dev libmpdclient-dev libi2c-dev i2c-tools lm-sensors
```

## Build and install cava

This file has been truncated. show original

Before following the instructions, first stop and disable the current mpd_oled service fwith

sudo systemctl stop mpd_oled
sudo systemctl disable mpd_oled

The libu8g2arm build takes quite a while. After mpd_oled is built and installed, the test command line would be, e.g.

mpd_oled -o SSD1309,128X64,I2C -f 25 -b 15

This version of mpd_oled has no correction for the scroll offset, as I am unsure if it is an issue that is specific to the old driver code and so will wait for a report with the new driver code before adding it in.

Chris3 · October 17, 2022, 1:14pm

Wow it works !
Thank you very much for your help.
I see little different font but without any scrolling issues.

Adrii · October 17, 2022, 2:45pm

Great! I am pleased it is working.

Cooler · December 31, 2022, 7:10am

Hi,
I use volumio 2 with pi2 (I prefer). Unfortunately, the codes or plugins provided only work with volumio 3.
Is there a possibility to make them work with volumio 2? Can you send me some code for that?
Thanks

Cooler · December 31, 2022, 7:18am

Page not found - mpd_oled/install_volumio2_deb.md at master · antiprism/mpd_oled · GitHub

Have you published anywhere else?

Thank you

Adrii · December 31, 2022, 7:57am

Hi

The mpd_oled repository includes all the old mpd_oled code, and the last change that included support for Volumio 2 is

Volumio2: build last version of cava with bundled libiniparser · antiprism/mpd_oled@3de8a17 · GitHub

However, Volumio 2 is unsupported by Volumio and towards the end of its life it had a broken compiler, which meant mpd_oled could no longer be built on it

Cannot install build-essential package

I therefore stopped supporting mpd_oled on Volumio 2.

If you want to run mpd_oled on Volumio 2 you could, maybe, build binaries on Raspbian Jessie, and then copy the various mpd_oled binaries and scripts to the Volumio 2 machine.

Adrian.

Adrii · May 14, 2023, 10:54am

Hi

I have just updated the mpd_oled repository and binary package with a change to the way that the mpd_oled service starts, for compatibility with Moode 8.3.2. I have tested the direct mpd_oled install on current volumio, and it is working fine, but I have not tested whether these changes interfere with the mpd_oled Volumio 3 plugin install. If there are issues then the previous mpd_oled binary package is still available to use in the plugin

Packages for mpd_oled

Adrian.

michel8166 · May 14, 2023, 1:57pm

I just tried it, the mpd oled does not start with the Volumio 3 mpd oled plugin version 1.1.1