GoldenMorning 0.91 Inch I2C/IIC 4-Pin OLED Display Module (128 * 32 Pixel Matrix, White Light Output)

Bring ultra-crisp, high-contrast visual status indicators to your electronics projects with the GoldenMorning 0.91 Inch I2C 4-Pin OLED Display Module. Delivering bright white pixel graphics on a deep black background at a crisp $128 imes 32$ resolution, this module is driven by the popular SSD1306 display controller IC. Designed with a minimal 4-pin I2C serial interface ( $V_{CC}$ , $GND$ , $SCL$ , $SDA$ ), it saves valuable IO pins on your microcontroller while eliminating the need for a backlight thanks to self-illuminating organic LED technology. Ideal for wearables, smart meters, IoT devices, and compact portable electronics using Arduino, ESP32, STM32, and Raspberry Pi.

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Tags GoldenMorning 0.91 OLED 0.91 inch I2C OLED White 128x32 OLED Display Module SSD1306 4 Pin OLED White 0.91 OLED Screen Arduino OLED Module 0.91 ESP32 I2C OLED Display

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Product Details :

The GoldenMorning 0.91 Inch I2C 4-Pin OLED Display Module is a high-performance, ultra-compact graphic display panel designed for microcontrollers requiring rich graphical feedback within tight physical footprints. Built with an internal SSD1306 driver IC, the module projects $128 imes 32$ individual white organic LED pixels, creating high readability even in bright ambient room lighting or outdoor shade.

Because OLED displays emit their own light without requiring a bulk backlighting panel, the GoldenMorning 0.91-inch display exhibits ultra-low power consumption (typically $< 15 ext{mA}$ during active display rendering). The $2 ext{-wire}$ I2C serial protocol (plus power and ground) allows hardware engineers to control full screen drawing, text, custom icons, and graphs using only two digital pins on host microcontrollers like Arduino Uno, ESP32, ESP8266, STM32, and Raspberry Pi.

Key Features and Benefits

Self-Illuminating OLED Technology: No backlight needed—delivers wide viewing angles ( $> 160^circ$ ) and high contrast ratio.
Crisp $128 imes 32$ Resolution: High pixel density allows clear rendering of multiple lines of text, numbers, progress bars, and custom bitmaps.
Simple 4-Pin I2C Interface: Minimizes microcontroller GPIO usage using standard $SCL$ and $SDA$ lines.
Low Power Draw: Consumes under $15 ext{mA}$ during normal display operations, making it suitable for battery-operated IoT wearables.
Broad Controller Support: Fully compatible with open-source graphics libraries including Adafruit SSD1306, U8g2, and U8glib.

Technical Specifications

Feature Component	Specification Details
Display Technology	Organic Light Emitting Diode (OLED)
Emitting Color	White
Screen Resolution	$128 imes 32$ Pixels
Driver IC	SSD1306
Communication Protocol	I2C / IIC ( $SCL, SDA$ )
Default I2C Address	$0 ext{x3C}$ (or $0 ext{x3D}$ depending on PCB jumper setting)
Operating Supply Voltage ( $V_{CC}$ )	$3.3 ext{V DC to } 5.0 ext{V DC}$ (Onboard voltage regulator)
Logic Level Compatibility	$3.3 ext{V and } 5.0 ext{V}$ Logic Compatible
Power Consumption	$pprox 0.04 ext{W}$ (Normal operation)
Operating Temperature	$-40^circ ext{C to } +70^circ ext{C}$

Pinout & Wiring Guide

1. Pin Assignment Table:

Pin Label	Type	Function / Recommended Connection
GND	Ground	Connect to System Ground ( $0 ext{V}$ )
VCC	Power Input	Connect to $+3.3 ext{V}$ or $+5.0 ext{V DC}$ Power Rail
SCL	Digital Input	I2C Serial Clock Line (e.g., Arduino A5 / ESP32 GPIO 22)
SDA	Digital I/O	I2C Serial Data Line (e.g., Arduino A4 / ESP32 GPIO 21)

2. Hardware Connection Schematic:

   +-----------------------+                    +-----------------------+
   |   Microcontroller     |                    | GoldenMorning 0.91"   |
   | (Arduino / ESP32/ MCU)|                    | I2C 4-Pin OLED Module |
   +-----------------------+                    +-----------------------+
   |  5V / 3.3V Power      |------------------->| VCC                   |
   |  GND                  |------------------->| GND                   |
   |  I2C SCL Clock        |------------------->| SCL                   |
   |  I2C SDA Data         |------------------->| SDA                   |
   +-----------------------+                    +-----------------------+

Applications

Smart Watches & Wearable Devices: Compact size and low profile fit into small enclosures.
IoT Weather & Sensor Nodes: Displaying temperature, humidity, battery level, and Wi-Fi connection status.
Audio & Media Equipment: Equalizer visualizers, volume indicators, and track information displays.
Handheld Instruments & Meters: Portable multimeters, digital calipers, and battery testers.