UPDATEDEVICE

flash the cat. it won’t thank you.

USB + CHROME

plug in. flash. resume judgment.

connect your Grudge Cat over USB, hit the button, pick the serial port, and wait. the whole thing happens in your browser — no toolchain, no terminal, no excuses. it erases and reflashes the whole chip, so the cat reincarnates with fresh firmware and the same contempt.

This browser can't flash — Web Serial only lives in Chrome, Edge or Opera (not Safari/Firefox). Flashing needs a secure context — open this page over HTTPS (or localhost).

new firmware. same contempt.

you will need

Chrome, Edge, or Opera. Web Serial does not exist in Safari or Firefox. the cat does not care about your browser loyalty.
a USB data cable (not a charge-only one) and the matching USB-serial driver for your board — see below. without the driver the board never shows up in the port picker.

drivers — install yours first

Grudge Cat ships on three board variants, each with a different USB-serial chip. if your board doesn’t appear in the port picker, install the driver for its chip, replug, then flash:

Board A — WCH CH340. WCH CH34x macOS / Windows driver →
Board B — Silicon Labs CP2104. SiLabs CP210x VCP driver →
Board C — WCH CH9102. WCH VCP driver (covers CH9102) →

if it sulks

no port in the picker? wrong or missing driver, a charge-only cable, or a dead USB port. fix the driver first — that’s the cause nine times out of nine.
flashing fails or stalls? unplug, hold the BOOT button (GPIO0) while you replug, then flash again — that forces the chip into its serial bootloader.
flashed fine but the screen’s black? give it a few seconds to boot. still nothing → reflash.

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