CAIRN firmwareInstaller
Install CAIRN from your browser.
Pick your radio, plug it in, press Install. The installer always takes the newest release from GitHub and checks it before writing anything.
Chrome or Edge
Installing over USB needs Chrome, Edge or Opera on a Mac, Windows or Linux computer. Safari, Firefox and phones get the file and the steps instead.
Update keeps it
An update keeps your identity, contacts, channels and settings. A fresh install erases the radio first; coming from MeshCore, export your identity and contacts in the app before you start.
Every file, every time
Each file comes from the latest release and must match its SHA-256 checksum. The installer also checks the chip, the flash size and, for an update, that your data can stay.
More on each board in the board list and the install guides. Writing over USB uses Espressif's esptool-js (Apache 2.0).