# Adafruit ItsyBitsy ESP32 > Ultra-compact ESP32 development board in the ItsyBitsy form factor with WiFi, Bluetooth Classic + BLE, USB-C, and LiPo charging — perfect for space-constrained wireless projects. ## Quick Facts - **Brand:** Adafruit - **Board Type:** dev-board - **Price:** ~$14.95 - **CPU:** Xtensa LX6 dual-core @ 240MHz (ESP32) - **CPU Architecture:** Xtensa LX6 - **CPU Cores:** 2 - **RAM:** 520KB SRAM - **PSRAM:** 2MB - **Flash:** 8MB - **USB:** USB-C 2.0 (via CP2102N bridge) - **Power:** 5V via USB-C or 3.3V pin - **Operating Voltage:** 3.3V - **Dimensions:** 36 × 17.8mm - **Battery:** optional - **Antenna:** Built-in PCB antenna ## Connectivity - **Wifi:** 802.11 b/g/n - **Bluetooth:** Bluetooth Classic + BLE 4.2 ## Compatible Firmware esp-idf, arduino, micropython, circuitpython ## Use Cases - iot - smart-home - wearable - prototyping ## Components - **undefined** (mcu): ESP32-PICO-MINI-02 module with dual-core Xtensa LX6 @ 240MHz, 8MB flash, 2MB PSRAM, integrated WiFi and Bluetooth — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-mini-02_datasheet_en.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export) - **undefined** (battery-charger): MCP73831 single-cell LiPo/LiIon battery charge management controller with programmable charge current — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F20001984g.pdf&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export) ## Protocols - **I2C**: SDA: GPIO3, SCL: GPIO4 - **SPI**: MOSI: GPIO35, MISO: GPIO37, SCK: GPIO36 - **UART**: TX: GPIO43, RX: GPIO44 - **PWM** - **ADC**: A0: GPIO1, A1: GPIO2, A2: GPIO3, A3: GPIO4, A4: GPIO5, A5: GPIO6 ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO1 | A0 — ADC1_CH0 | ADC | adc, digital-input, digital-output, pwm | | GPIO2 | A1 — ADC1_CH1 | ADC | adc, digital-input, digital-output, pwm | | GPIO3 | A2 / SDA — ADC1_CH2 / I2C Data | I2C | adc, digital-input, digital-output, pwm | | GPIO4 | A3 / SCL — ADC1_CH3 / I2C Clock | I2C | adc, digital-input, digital-output, pwm | | GPIO5 | A4 — ADC1_CH4 | ADC | adc, digital-input, digital-output, pwm | | GPIO6 | A5 — ADC1_CH5 | ADC | adc, digital-input, digital-output, pwm | | GPIO7 | D5 — Digital GPIO | — | digital-input, digital-output, pwm | | GPIO8 | D6 — Digital GPIO | — | digital-input, digital-output, pwm | | GPIO9 | D9 — Digital GPIO | — | digital-input, digital-output, pwm | | GPIO10 | D10 — Digital GPIO / CS | — | digital-input, digital-output, pwm | | GPIO11 | D11 — Digital GPIO | — | digital-input, digital-output, pwm | | GPIO35 | MOSI — SPI Data Out | SPI | digital-input, digital-output, pwm | | GPIO37 | MISO — SPI Data In | SPI | digital-input, digital-output, pwm | | GPIO36 | SCK — SPI Clock | SPI | digital-input, digital-output, pwm | | GPIO43 | TX — UART0 Transmit | UART | digital-input, digital-output, pwm | | GPIO44 | RX — UART0 Receive | UART | digital-input, digital-output, pwm | ## Description The Adafruit ItsyBitsy ESP32 is a tiny yet powerful development board built around the ESP32-PICO-MINI-02 module, packing dual-core 240MHz Xtensa LX6 processing, 8MB flash, 2MB PSRAM, and full WiFi 802.11 b/g/n plus Bluetooth Classic and BLE 4.2 into the compact 36×17.8mm ItsyBitsy form factor. Despite its small size, the board exposes a generous set of I/O: 11 GPIO pins, 6 analog inputs, hardware I2C, SPI, and UART, plus LEDC PWM available on every GPIO. USB-C via a CP2102N bridge handles programming and serial communication, while an onboard MCP73831 LiPo charger lets you run the board from a rechargeable battery. The ItsyBitsy ESP32 is compatible with Arduino, ESP-IDF, MicroPython, and CircuitPython, making it a versatile choice for IoT sensors, smart-home gadgets, wearables, and any wireless maker project where board real estate is at a premium. It fits directly into breadboards and can be soldered into tight enclosures where a full Feather or development board would not fit. ## Where to Buy - [Buy for $14.95](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5889&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export) ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5727&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-itsybitsy-esp32&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ItsyBitsy-ESP32-PCB&ref=openhardware.directory&product=adafruit-itsybitsy-esp32&source=md-export) ## Images ![Adafruit ItsyBitsy ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-itsybitsy-esp32/d4fcb15c93bd.jpg) ![Adafruit ItsyBitsy ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-itsybitsy-esp32/9156403cec0f.jpg) ![Adafruit ItsyBitsy ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-itsybitsy-esp32/b4c3e7ec5d82.jpg) ![Adafruit ItsyBitsy ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-itsybitsy-esp32/e2bba6aec42f.jpg) ![Adafruit ItsyBitsy ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-itsybitsy-esp32/2e15588bd36d.jpg) ![Adafruit ItsyBitsy ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-itsybitsy-esp32/a95e648a7370.jpg) ![Adafruit ItsyBitsy ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-itsybitsy-esp32/fcc67b2853b0.jpg) ![Adafruit ItsyBitsy ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-itsybitsy-esp32/faf5e226a7cf.jpg) > **Battery Powered:** Li-Po --- [View full device page](https://openhardware.directory/devices/adafruit-itsybitsy-esp32)