ESP32 OLED module esp32 for WiFi and Bluetooth ESP ESP32

SKU: FA1053-4
Microcontroller

ESP32-WROOM-32 (Dual-core, 240 MHz)
OLED Display

0.96 inch, 128×64 resolution, SSD1306 driver
Memory

4MB (32Mbit) Flash, 520KB SRAM
Connectivity

Wi-Fi (2.4GHz), Bluetooth 4.2 (BLE/Classic)
Operating Voltage

3.3V (Logic); 5V (USB input); 3.3V–7V (Vin)
Display Interface

I2C (SDA=GPIO21, SCL=GPIO22; Address: 0x3C)
USB-to-Serial

CP2102 or CH340 (model dependent)
Dimensions

Approx. 53.2mm x 28.7mm
The ESP32 OLED Module is an advanced IoT development platform that integrates a high-resolution 0.96-inch OLED display directly onto an ESP32-WROOM-32 microcontroller board. By combining visual feedback with dual-mode wireless connectivity, this module eliminates the need for external wiring and breadboards, making it a professional-grade tool for both rapid prototyping and commercial IoT deployment in 2026.
Long Description
Designed for modern connected applications, the ESP32 OLED module features a powerful dual-core 240MHz processor and 4MB of Flash memory, providing the computational overhead needed for complex multitasking, such as simultaneously running a web server and a real-time display. The integrated 128×64 pixel OLED uses the reliable SSD1306 driver, allowing for crisp visualization of sensor data, network status, or custom user interfaces without the clutter of extra components.
For business purchasers, this board is an ideal “all-in-one” solution for smart industrial monitoring, medical wearables, and commercial security devices, as its compact form factor fits easily into standardized industrial housings. Individual makers benefit from its seamless integration with the Arduino IDE and MicroPython, allowing for a “plug-and-play” experience with minimal setup.
Key Features
  • Integrated Visual Interface: Built-in 0.96″ OLED (128×64) eliminates external display wiring.
  • Dual Wireless Connectivity: Supports Wi-Fi (802.11 b/g/n) and Bluetooth (Classic + BLE 4.2) for versatile remote communication.
  • Battery Support: Includes an onboard 3.7V Lithium battery charging circuit with a JST connector for portable power.
  • Dual-Core Performance: Multitasking-ready processor handles wireless stacks and user code independently.
  • Rich I/O Expansion: Access to 28-32 GPIOs, including 12-bit ADCs, DACs, SPI, I2C, and UART.
Usage Instructions
  1. Hardware Connection: Connect to a computer via Micro-USB or Type-C (depending on the specific version).
  2. Driver Setup: Install the CH340 or CP2102 USB-to-Serial driver for your OS.
  3. IDE Configuration:
    • In the Arduino IDE, add the ESP32 board URL to Preferences and install the ESP32 board package.
    • Select “ESP32 Dev Module” as the target board.
  4. Display Library: Install the U8g2 or Adafruit_SSD1306 library from the Library Manager to control the OLED.
  5. Powering: Use the USB port for development or connect a 3.7V Li-Po battery to the JST port for standalone operation.
Q: Can the board run off a battery alone?

Yes. It has a built-in battery management system. You can connect a 3.7V Lithium battery to the onboard JST connector; the board will also charge the battery when plugged into USB.

Q: What are the default I2C pins for the OLED?

Most models use GPIO 21 (SDA) and GPIO 22 (SCL) with an I2C address of 0x3C.

Q: Is the display sunlight-readable?

While OLEDs have high contrast and are excellent in dark environments, they may be difficult to read in direct, bright sunlight. They are best suited for indoor or shaded outdoor use.

Q: Can I use this for industrial applications?

Yes. The ESP32 is rated for operating temperatures from -40°C to +85°C, making it suitable for industrial automation and monitoring.

Q: Why is my OLED not turning on?

Ensure you have initialized the display in your code with the correct I2C address (usually 0x3C) and pins. Also, check that your power source provides at least 500mA, as Wi-Fi and the OLED together can cause voltage drops.

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