OLED spectrum display on Volumio on Raspberry Pi Zero W

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

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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.