ESP32-C3 with 0.42 OLED Development Board

ESP32-C3 OLED development board with 0.42-inch OLED module is a compact Wi-Fi and Bluetooth LE microcontroller board based on the RISC-V architecture. It features the powerful ESP32-C3 SoC, integrated USB for programming and a 0.42-inch monochrome OLED display for real-time data or status feedback. Ideal for loT, wireless sensor nodes, and portable embedded projects.

Features:

• ESP32-C3 SoC: 32-bit single-core RISC-V processor with Wi-Fi and Bluetooth 5 (LE).
• Integrated OLED Display: 0.42-inch monochrome screen for debugging, data display, or UI.
• Onboard USB Port: Direct programming and power via USB-C or micro-USB port.
• Low Power Consumption: Ideal for battery-powered embedded applications.
• GPIO and I2C Support: Multiple I/O for sensors, buttons, relays, and displays.

Technical Specifications:

• Processor: 32-bit RISC-V, up to 160MHz
• Flash Memory: 4MB (typical)
• SRAM: 400KB
• Wireless: Wi-Fi 802.11 b/g/n + Bluetooth 5.0 LE
• OLED Display: 0.42-inch, 72×40 resolution, I2C-based.
• Operating Voltage: 3.3V logic (powered via 5V USB)
• GPIO: up to 15 configurable digital pins

Mechanical Specifications:

• PCB Size: Approx. 25mm x 50mm
• Mounting Holes: Often includes 2 or 4 M2 holes for easy enclosure fitting
• Display Placement: Soldered or surface-mounted OLED module on top

Mounting Options:

• Header Pin Compatible: Breadboard friendly with 2.54mm pin spacing
• SMD-Compatible: Can be surface-mounted in compact enclosures

Schematic Diagram, Connection, Wiring and Pinout:

• Pinout: GPIOs labeled on PCB, supports ADC, PWM, I2C, and UART
• LED: Connected via I2C (SDA and SCL pins)
• Power: 5V input via USB, 3.3V regulated onboard
• Boot/Reset: Buttons included for flashing and resetting the chip

Datasheet and Documentation:

• ESP32-C3 SoC Datasheet
• 32-C3 Development Board Scheme
• SP-IDF and Arduino IDE Support Available

Applications:

• Wireless Sensor Networks: Monitor and transmit sensor data with onboard display.
• IoT Projects: Real-time control and monitoring using Wi-Fi or BLE.
• Wearables and Portables: Small form-factor enables integration into compact devices
• Development and Testing: Onboard display helps debug embedded programs
• Home Automation: Control relays, lights, or read environmental sensors

Equivalent Models:

• ESP32-C3 Mini: Similar specs without OLED screen
• Lolin C3 Mini: Compact ESP32-C3 board with USB and basic I/O
• Seeed XIAO ESP32-C3: Ultra-small form factor with RISC-V core

Package Includes:

• ESP32-C3 with 0.42″ OLED Development Board