Raspberry Pi Pico W repurposed as USB Wi‑Fi adapter

The GitLab repository pico‑usb‑wifi provides a complete guide for converting a Raspberry Pi Pico W into a USB Wi‑Fi adapter. The project leverages the board’s built‑in Wi‑Fi radio and programs it to appear as a USB Ethernet device, letting a host computer treat the Pico W like any other network dongle [GitLab].

The conversion process is laid out step by step. First, users flash a TinyUSB‑based firmware onto the Pico W via the standard UF2 bootloader. The firmware configures the Wi‑Fi chip to join a specified network and implements the USB CDC‑ECM class, which the host OS recognises as a network interface. The repo includes scripts for building the firmware, sample configuration files, and instructions for installing the appropriate drivers on Windows, macOS, and Linux [GitLab].

Because the Pico W costs under $10, the resulting adapter is dramatically cheaper than commercial USB Wi‑Fi dongles. Its open‑source nature means developers can tweak the firmware, add custom packet handling, or integrate the adapter into larger embedded projects without licensing constraints. The design also supports headless operation, making it suitable for IoT prototypes that need a reliable, low‑cost network link.

Beyond cost savings, the project demonstrates the flexibility of the Pico W platform. By exposing the Wi‑Fi module through a standard USB interface, the adapter bridges the gap between hobbyist microcontroller boards and conventional PC peripherals, expanding the toolbox for rapid hardware development.