Sourcecode for project described in Volumio Forum: https://community.volumio.org/t/wifi-remote-for-volumio-based-on-esp32-and-oled/39146

Releases can be found here: https://github.com/drvolcano/Volumio-ESP32/releases

You may be interrested in this fork (work in progress) https://github.com/Maschine2501/Volumio-ESP32

Relases currently only support monochrome displays that are compatible with u8g2

Newer code in the repository contains alpha-code for color-displays (SSD1351)

Code was tested on the following hardware components

• ESP32-WROOM-32 (AZDelivery Developement Board - Amazon link)
• SSD1327 (monochrome, 128x128, 4-Wire-SPI, using u8g2 library - Amazon link)
• SSD1351 (65k Color, 128x128, 4-Wire-SPI, currently Alpha - Amazon link)

Configuration

Basic settings to configure your system can be made in main.h Pins for color display have to be defined in SSD1351.h as its currently under development

Debugging

/lib/LibDebug/LibDebug.h can be used to send debugging messages to COM port. Value 0 disables debugging, 1 is normal level, 2 extended (if available)

The project contains the following libraries:

DigitalPin

Debouncing and edge detection for digital inputs

TouchPin

Debouncing and edge detection for touch inputs

Encoder

Processing of AB digital encoder wheel

CharStream

Prototype for other classes like Inflate, JSON and SocketIO

JSON

Parser for JSON strings.

Inflate

Inflating streams, compressed by deflate algorithm. Needed for SocketIO

SocketIO

Send and receive data from SocketIO Server

Volumio

Connect to volumio using SocketIO Send commands and receive data

SSD1351

Driver class for color display

GrayscaleFonts

Font rendering for color display Using prerendered TTF fonts

UiElements

Helper lib for drawing to OLEd display Like progress bars and splitting or scrolling text

U8g2Fonts

Helper lib for rendering U8g2 fonts to color display Actually not used, replaced by GrayscaleFonts