Description
Product Overview
The 2.42-inch Passive Matrix OLED Display Module is a large-format, high-contrast monochrome graphic display designed for embedded systems, industrial control panels, medical devices, and IoT applications . Powered by the SSD1309 driver IC and featuring a crisp 128×64 pixel resolution, this display delivers bright white text, detailed graphics, and custom icons on a true black background — all in a spacious 2.42-inch diagonal format (approximately 61.5mm diagonal) .
Why the SSD1309 Controller?
Unlike the common SSD1306 controller used on smaller 0.96″ and 1.3″ OLEDs, the SSD1309 is specifically designed for larger OLED panels. It offers:
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Higher row drive current: 40mA maximum vs. 15mA for SSD1306, providing brighter and more uniform illumination across the larger screen area
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External boost regulator: These modules use an external switching boost converter (visible as a small inductor and diode on the PCB) to generate the higher voltage (approx. 12.5V) needed for larger OLED panels, replacing the internal charge pump used by SSD1306 modules
The 5-pin I2C interface (GND, VCC, SCL, SDA, RES) requires only two data lines to connect to your microcontroller, preserving valuable I/O pins for other peripherals. A dedicated RES (reset) pin allows hardware initialization of the display for reliable startup and recovery .
This module is compatible with ESP32, ESP8266, STM32, Raspberry Pi, and other 3.3V/5V logic systems. The I2C lines are 5V tolerant, making it safe for direct connection to 5V Arduino boards .
Key Features
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Large 2.42-Inch Active Area: 55.01 × 27.49mm display area — approximately 6 times larger than 0.96″ OLEDs, providing significantly more screen real estate for dashboards, data visualization, and UI elements
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White Monochrome OLED: Bright white pixels on true black background provide exceptional contrast and a professional, clean appearance
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SSD1309 Driver IC: Advanced controller specifically designed for larger OLED panels, featuring higher row drive current for superior brightness uniformity, 256-step contrast control, and internal SRAM buffer (128 × 64 bits)
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5-Pin I2C Interface: Pins GND, VCC, SCL, SDA, RES — requires only 2 data lines (SDA/SCL) with default address 0x3C, saving GPIO pins
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Dedicated RESET Pin: Allows external hardware reset control for reliable display initialization and recovery
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Wide Operating Temperature: Rated for -40°C to +85°C, suitable for industrial and outdoor applications
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Dual Voltage Logic Compatibility: I2C lines are 5V tolerant; works with both 3.3V (ESP32/ESP8266) and 5V (Arduino) systems — VCC requires 3.3V only
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Full Viewing Angle: >160° visibility ensures clear readouts from any angle without contrast shift
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Display Type | Passive Matrix OLED (PMOLED) |
| Driver IC | SSD1309 |
| Resolution | 128 × 64 pixels |
| Display Color | White |
| Active Area (W × H) | 55.01 × 27.49 mm |
| Module Dimensions (W × H) | 61.5 × 39.5 mm |
| Pixel Size (W × H) | 0.43 × 0.43 mm |
| Pixel Pitch (W × H) | 0.39 × 0.39 mm |
| Default I2C Address | 0x3C (configurable to 0x3D) |
| Logic Supply Voltage (VCC) | 3.3V only (do not use 5V) |
| Logic I/O Compatibility | 3.3V logic, 5V tolerant for I2C lines |
| Current Draw (All pixels off) | ~2mA |
| Current Draw (All pixels on) | ~285-290mA peak |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +85°C |
| Interface | I2C (5-pin: GND, VCC, SCL, SDA, RES) |
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