# 0.91" OLED I2C Display (128x32)

> Compact 0.91-inch monochrome OLED display module with 128x32 pixel resolution and SSD1306 driver. Communicates over I2C interface, ideal for small status readouts and embedded projects.

## Quick Facts

- **Brand:** OpenELAB
- **Board Type:** display-module
- **Price:** ~$5.99
- **Product Readiness:** developer
- **CPU:** None (passive display module)
- **RAM:** None
- **Flash:** none
- **Power:** 3.3V-5V via header pins
- **Operating Voltage:** 3.3V-5V
- **Display:** 0.91" OLED 128x32

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** No

## Use Cases

- embedded-ui
- iot-prototyping
- data-display
- weather-station
- sensor-readout

## Components

- **SSD1306** (display-driver): 128x64/128x32 monochrome OLED driver with I2C and SPI interface, built-in charge pump, and 1KB GDDRAM — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=oled-091-inch-i2c-display&source=md-export)

## Protocols

- **I2C**

## Description

## Overview

The 0.91" OLED I2C Display is a compact monochrome display module featuring a 128x32 pixel resolution. Built around the SSD1306 driver IC, it communicates over the I2C bus using just two data lines (SDA and SCL), making it extremely easy to integrate with Arduino, ESP32, Raspberry Pi, and other microcontroller platforms.

## Key Features

- **Ultra-compact form factor** — 0.91-inch diagonal, perfect for space-constrained projects
- **High contrast OLED** — self-emissive pixels with true blacks, no backlight needed
- **Simple I2C interface** — only 4 pins required (VCC, GND, SDA, SCL)
- **Wide viewing angle** — OLED technology provides excellent visibility from any angle
- **Low power consumption** — individual pixel control means only lit pixels draw power

## Typical Applications

- Status displays for IoT sensor nodes
- Battery level and signal strength indicators
- Small data readouts (temperature, humidity, time)
- Wearable electronics and portable instruments
- Menu displays for embedded systems

## Pinout

| Pin | Function |
|-----|----------|
| VCC | 3.3V–5V Power |
| GND | Ground |
| SDA | I2C Data |
| SCL | I2C Clock |

## Library Support

Compatible with popular Arduino libraries including Adafruit SSD1306, U8g2, and SSD1306Ascii. Also supported by MicroPython, CircuitPython, and ESP-IDF frameworks.

## Where to Buy

- [OpenELAB](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F091incholedi2cdisplay&ref=openhardware.directory&product=oled-091-inch-i2c-display&source=md-export) — $5.99

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2F091incholedi2cdisplay&ref=openhardware.directory&product=oled-091-inch-i2c-display&source=md-export)

## Tags

`oled`, `display`, `i2c`, `ssd1306`, `128x32`, `monochrome`

## Images

![0.91" OLED I2C Display (128x32)](https://nbg1.your-objectstorage.com/openhardware-directory/entities/oled-091-inch-i2c-display/c04c1e73d4c3.jpg)

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