I2C 4 Line Display Usermod

First, thanks to the authors of the ssd11306_i2c_oled_u8g2 mod.

Provides a four line display using either 128x32 or 128x64 OLED displays. It can operate independently, but starts to provide a relatively complete on-device UI when paired with the Rotary Encoder UI usermod. I strongly encourage you to use them together.

See the pair of usermods in action

Installation

Copy and update the example platformio_override.ini.sample from the Rotary Encoder UI usermode folder to the root directory of your particular build. This file should be placed in the same directory as platformio.ini.

Define Your Options

• USERMOD_FOUR_LINE_DISPLAY - define this to have this mod included wled00\usermods_list.cpp - also tells Rotary Encoder usermod, if installed, the display is available
• FLD_PIN_SCL - The display SCL pin, defaults to 5
• FLD_PIN_SDA - The display SDA pin, defaults to 4

All of the parameters can be configured via the Usermods settings page, inluding GPIO pins.

PlatformIO requirements

This usermod requires the U8g2 and Wire libraries. See the platformio_override.ini.sample found in the Rotary Encoder UI usermod folder for how to include these using platformio_override.ini.

Configuration

• enabled - enable/disable usermod
• pin - GPIO pins used for display; I2C displays use Clk & Data; SPI displays can use SCK, MOSI, CS, DC & RST
• type - display type in numeric format
  • 1 = I2C SSD1306 128x32
  • 2 = I2C SH1106 128x32
  • 3 = I2C SSD1306 128x64 (4 double-height lines)
  • 4 = I2C SSD1305 128x32
  • 5 = I2C SSD1305 128x64 (4 double-height lines)
  • 6 = SPI SSD1306 128x32
  • 7 = SPI SSD1306 128x64 (4 double-height lines)
• contrast - set display contrast (higher contrast may reduce display lifetime)
• refreshRateSec - display refresh time in seconds
• screenTimeOutSec - screen saver time-out in seconds
• flip - flip/rotate display 180°
• sleepMode - enable/disable screen saver
• clockMode - enable/disable clock display in screen saver mode
• i2c-freq-kHz - I2C clock frequency in kHz (may help reduce dropped frames, range: 400-3400)

Change Log

2021-02

• First public release

2021-04

• Adaptation for runtime configuration.

2021-11

• Added configuration option description.