This compact ESP32 board combines Wi-Fi, Bluetooth, a 0.96″ OLED display, and a built-in 18650 battery holder with charging circuitry. Ideal for portable IoT, sensor logging, and display-based embedded applications.

Specifications

• Microcontroller: ESP32-WROOM-32
• CPU: Dual-core Tensilica LX6 @ up to 240 MHz
• Wireless:
  - Wi-Fi 802.11 b/g/n
  - Bluetooth 4.2 BR/EDR + BLE
• Display: 0.96″ OLED (128×64 pixels, yellow & blue split)
• USB Interface: CP2102 USB-to-Serial (Type-C connector)
• Battery Support:
  - 18650 Li-ion cell (holder integrated)
  - Charging circuit with status LEDs
  - Red = charging
  - Green = full
• Power Input: 5 V via USB-C or battery
• Voltage Regulation: Onboard 3.3 V LDO
• GPIO: 30+ pins (including I²C, SPI, UART, ADC, PWM)
• Flash Memory: 4 MB
• Operating Modes: AP, STA, AP+STA
• Dimensions: ~85 mm × 30 mm
• Mounting: PCB holes and battery clip
• OS Compatibility: Arduino IDE, MicroPython, ESP-IDF

Features

• Integrated OLED for real-time display of sensor data, status, or UI
• Built-in battery holder and charger for portable operation
• USB-C interface for modern connectivity and reliable flashing
• Ideal for IoT, wearables, sensor nodes, and display-based projects
• Common use cases:
  - Portable sensor loggers and weather stations
  - BLE/Wi-Fi display dashboards
  - Battery-powered automation nodes
  - Classroom and STEM embedded projects