Written by 
0.42 inch OLED Dev Board for ESP32‑C3 – WiFi & BT Wireless Module with Ceramic Antenna
Elevate your IoT projects with this compact, high‑performance SuperMini development board. Powered by the ESP32‑C3, it delivers robust WiFi and Bluetooth LE connectivity, while the crystal‑clear 0.42‑inch OLED display offers crisp visuals for real‑time data, status indicators, and user interfaces. Designed for developers who demand reliability, low power consumption, and space efficiency, this board is your gateway to smart, connected solutions.
Key Highlights
- ESP32‑C3 MCU – dual‑core, 240 MHz, integrated WiFi & Bluetooth LE
- 0.42‑inch OLED (128×64) – high contrast, low power, 3.3 V logic
- Ceramic antenna – superior range and signal stability
- Ultra‑compact SuperMini form factor – 20 mm × 20 mm
- Easy I²C/SPI communication – ready for sensors, displays, and peripherals
- Low‑power sleep modes – ideal for battery‑powered IoT devices
- Robust PCB layout – EMI‑filtered, with onboard voltage regulators
- Compatible with Arduino, ESP-IDF, and MicroPython ecosystems
Why Choose This Development Board?
Whether you’re prototyping a wearable, building a smart home hub, or creating an industrial monitoring system, this board’s blend of performance, size, and connectivity makes it a standout choice. The OLED display eliminates the need for external modules, reducing BOM costs and board complexity. Its ceramic antenna ensures reliable signal reception in challenging environments, while the ESP32‑C3’s low‑power modes keep your devices running longer on a single charge.
Specifications
Processor: ESP32‑C3 (dual‑core, 240 MHz)
Memory: 448 KB SRAM, 4 MB Flash
Connectivity: 802.11 b/g/n WiFi, Bluetooth LE 5.0
Display: 0.42‑inch OLED, 128×64 pixels, I²C interface
Power: 3.0 V–3.6 V input, 5 V USB‑C, 3.3 V logic
Dimensions: 20 mm × 20 mm × 3 mm
Operating Temp: –40 °C to +85 °C
Applications
• Wearable health trackers
• Smart home control panels
• Industrial sensor nodes
• Remote environmental monitoring
• DIY robotics and automation projects
Start building smarter, faster, and more reliably with the 0.42 inch OLED Dev Board for ESP32‑C3 – the ultimate SuperMini solution for modern IoT development.
Price: Original price was: $ 9.45.$ 4.63Current price is: $ 4.63.