Firmware 0.1.0-rc.3. Plug the ESP32 DevKit into this computer by USB (out of the board, or the board unpowered), then press the button and pick its port (CP210x or CH340).
An ESP32 30-pin DevKit, an ESP32-S3 DevKit (plug into its UART port) or an ESP32-C3 SuperMini, on its own or on a breakout board: the right image is picked for the chip. Its outputs are 3.3 V logic and need a MOSFET or relay module to switch anything; the wiring is in BARE-DEVKIT.md.
No port? Install the USB driver (Silicon Labs CP210x or WCH CH340) and try another cable. Cannot
connect? Hold the DevKit's BOOT button while you connect (a C3 SuperMini: hold BOOT while plugging it in). A Pico W or Pico 2 W is flashed by copying its
first-flash-…uf2 file from the release onto its BOOTSEL drive (GETTING-STARTED.md).
The image is the stock firmware, unsigned. Releases: github.com/speck0413/specter-proptroller