3. Wiring

1-8 Displays, One Multiplexer, One Controller

CONNECTOR PINS for DISPLAY/MULTIPLEXER

• Lolin D32 ESP32 SCL 22, SDA 21
• Lolin D32 Pro ESP32 SCL 22, SDA 21
• Wemos D1 mini ESP8266 SCL D1, SDA D2

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One Display, One Controller, No Multiplexer

CONNECTOR PINS for DISPLAY/MULTIPLEXER

• Lolin D32 ESP32 SCL 22, SDA 21
• Lolin D32 Pro ESP32 SCL 22, SDA 21
• Wemos D1 mini ESP8266 SCL D1, SDA D2

See Wiki / 6. Configuration for software configuration

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1-8 Displays with OLED-Adaptor, One Multiplexer, One Controller

Wiring for ESP32 Lolin D32 controller, the same setup also works with ESP8266 controllers.
CONNECTOR PINS for DISPLAY/MULTIPLEXER

• Lolin D32 ESP32 SCL 22, SDA 21
• Lolin D32 Pro ESP32 SCL 22, SDA 21
• Wemos D1 mini ESP8266 SCL D1, SDA D2

This setup is for the 2x and 4x OLED Adaptors for 0.87" 128x32 displays from this project: MobaLedLib 0.87" OLED-Adapter.

As the voltage regulator and reset electronic are missing on the adaptor pcb, the following components need to be added to the wiring.

• 1 Voltage Regulator 3.3V 1A, LD1117, AMS1117, ...
• 1 Schottky Diode 1N5817
• 1 Electrolytic Capacitor 4.7µF 20V
• 1 Electrolytic Capacitor 10µF 20V
• 10 Resistor 4.7kΩ

MobaLedLib - Shop

• OLED Adaptor 2x or 4x
• OLED displays 0.87" 128x32

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Deprecated - Roc-MQTT-Display-LT - One Display, One ESP8266-01 Controller

NOT tested with the latest version! The LT version will NOT be enhanced anymore, the functionality is included in the main project Roc-MQTT-Display now!