A board fresh from the shop has no Schaltli on it, and nothing to update over the air.
This page writes the whole firmware onto it through the USB cable - no install, no drivers, no Python.
This browser cannot talk to a serial port. Chrome or Edge on a computer can; Firefox and Safari cannot,
and neither can a phone.
A browser only offers serial ports on a secure page. Open this page over https.
No factory image has been published yet. Once a firmware release carries one, it appears here.
1. Which board do you have?
2. Which firmware?
3. Connect and write
Your browser will ask which port to use. Hold the board's BOOT button while connecting only if it will not answer.