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Walnut Pi PicoW ESP32-S3 Development Board
The Walnut Pi PicoW is an ESP32-S3 development board in a compact form factor compatible in size with Raspberry Pi Pico W projects. It is a Walnut Pi product, not a Raspberry Pi board, and uses Espressif’s ESP32-S3 platform for Wi-Fi, Bluetooth, MicroPython, and embedded-IoT development.
Core Hardware
- MCU: ESP32-S3R2, dual-core 32-bit processor up to 240 MHz.
- Memory: 2 MB PSRAM and 8 MB flash.
- Wireless: 2.4 GHz 802.11 b/g/n Wi-Fi and Bluetooth 5 with BLE and Mesh support.
- Antenna: onboard ceramic antenna, with optional IPEX4 external-antenna connection.
- Indicators and controls: programmable blue LED, red power LED, boot/function key, and reset key.
Interfaces
- 25 GPIO positions supporting ADC, PWM, UART, I2C, and SPI functions.
- USB Type-C / USB 2.0 for power, firmware download, programming, and serial debugging.
- Reserved UART0 debug interface, rear solder pads, and castellated edges for integration into compact assemblies.
- Supports MicroPython development; use a USB virtual serial connection for flashing and REPL debugging.
Compatibility and Bundle Notes
- The board’s size is compatible with Raspberry Pi Pico W-style projects, but firmware, pin mapping, and software support follow the ESP32-S3 platform.
- Bundle1 and Bundle2 are separate package configurations. Check the selected option and current bundle image for the included header or cable accessories before checkout.
- Use an appropriate USB Type-C data cable for programming; a charge-only cable will not provide serial access.
