CALC AI Flasher

Install or update the firmware on your calculator's XIAO board, straight from this page. The firmware goes directly to the board; nothing is saved on your computer.

1Pick your calculator

Loading the firmware list…

2Install or update

Full install Erases the board, including WiFi and API keys. For a new board, or one that won't start. Update Keeps WiFi and API keys. For a board that already runs CALC AI.

3Get the board ready

Take a battery out of the calculator first. Never connect USB-C while the batteries are in: it can damage the board.

Plug the XIAO into this computer with a USB-C cable that carries data (some cables only charge).
Put it in flash mode: hold B, tap R, then let go of B. The two tiny buttons are next to the USB-C port.

A battery is out, and the board is plugged in.

4Flash

I agree to the Terms of Use: this firmware is only for my own CALC AI calculator, and I won't share, copy or resell it.

Pick a calculator first.

Your browser lists the board as USB JTAG/serial debug unit. Choose it and click Connect.

Technical log