0.91 inch 128×32 Blue OLED Display

0.91 inch 128×32 Blue OLED Display Module is an ultra-compact, high-contrast visual interface component designed for small, portable electronic projects. This Organic Light-Emitting Diode (OLED) display utilizes the efficient SSD1306 controller chip, which manages all display functions internally. Consequently, it requires minimal external circuitry. The self-illuminating pixels produce vibrant blue graphics and text with incredibly deep blacks, ensuring excellent readability from extreme viewing angles, even so, it consumes very little power. This module supports both I²C and SPI communication protocols, therefore offering flexible integration with a wide range of microcontrollers, including Arduino, ESP32, and Raspberry Pi. You can confidently select this display for battery-powered devices where both size and power efficiency are critical design factors.

Key Features:

• High Contrast Ratio: OLED technology provides superior contrast (>10,000:1) and true black levels, ensuring clear visibility in various lighting conditions.
• Low Power Consumption: Since the pixels are self-emissive, the display draws minimal current, significantly extending the battery life of portable applications.
• Wide Viewing Angle: Offers viewing angles greater than 160° because the display does not rely on a backlight.
• Integrated Controller: The built-in SSD1306 driver chip handles RAM buffering and display control, simplifying the host microcontroller’s software requirements.
• Dual Interface Support: Supports both I²C (2-wire) and SPI (4-wire) serial interfaces, allowing you to choose the protocol best suited for your project’s wiring and speed needs.

Technical Specifications:

• Screen Size: 0.91 inch (Diagonal)
• Resolution: 128 × 32 pixels
• Display Color: Monochrome Blue
• Controller IC: SSD1306
• Operating Voltage (V_CC): 3.3 V to 5 V DC
• Interface: I²C (Default) or SPI (Hardware selectable, depending on module version)
• Operating Temperature: −40°C to +85°C

Mechanical Specifications:

• Display Technology: OLED (Organic Light-Emitting Diode)
• Module Dimensions: ≈ 38.0 mm × 12.0 mm
• Mounting Method: Solder pads or standard pin header connections for prototyping.
• Weight: ≈ 2 g (Extremely lightweight)

Dimensions:

• Module Length: ≈ 38.0 mm
• Module Width: ≈ 12.0 mm
• Module Thickness: ≈ 4.0 mm
• Active Display Area: 22.38 mm × 5.50 mm
• Number of Pins: 4 (I²C) or 7 (SPI) (Varies by module)

Pinout and Wiring:

• VCC: Connect this pin to the power supply (3.3V or 5V).
• GND: Connect this pin to the common ground (0V).
• SCL (Serial Clock): Connect this pin to the microcontroller’s SCL/Clock line.
• SDA (Serial Data): Connect this pin to the microcontroller’s SDA/Data line.
• I²C Note: The standard I²C address is typically 0x3C or 0x3D, consequently, confirm the address setting via the module’s datasheet or silkscreen.

Datasheet Reference:

• Download SSD1306 Controller Datasheet

Commonly Used in:

• Wearable Technology: Ideal for smart watches, fitness trackers, and portable sensor devices due to its small size and low power draw.
• Portable Test Equipment: Provides a compact readout for multimeters, signal generators, and environmental monitors.
• Miniature Robotics: Serves as the main feedback display for small drones, DIY robots, and remote controllers.

Applications:

• System Status Indicators: Displaying battery level, Wi-Fi status, and system alerts on embedded devices.
• Data Logging Readouts: Providing real-time viewing of sensor data (temperature, humidity, pressure).
• Custom Graphical Interfaces: Creating small, simple menus and user navigation elements for handheld devices.

Equivalent Models:

• 0.96 inch 128×64 OLED: A slightly larger alternative, however, it uses the same SSD1306 controller and shares similar wiring.
• SPI 128×32 OLED: Functionally identical display that uses the SPI interface instead of I²C.
• White 0.91 inch 128×32 OLED: A version providing the same specifications but with white-colored pixels.

Package Includes:

• 1 x 0.91 inch 128×32 Blue OLED Display Module