Pick your board, plug it in over USB, hit install. The browser does the rest - no Arduino, no PlatformIO, no toolchain.
Three things that cover 90% of failed flash attempts.
The full image is written - bootloader, partitions, and app. Existing settings on the device are erased on a fresh install.
A dialog will ask which serial port to use. Pick the one that appears when you plug the board in.
Get the device on your WiFi. Two ways - the first one happens right in this tab.
When the flash completes, the install dialog opens a Configure WiFi step. Pick your home network from the list, type the password, and hit Connect. Credentials go to the device over USB using Improv Serial. No phone, no captive portal, no app switching.
If the Configure WiFi step times out or you dismiss the dialog, the board falls back to hotspot mode and prints these credentials on its screen. Connect to it from a phone or laptop and finish setup in a browser.
XXXX is a unique 4-character suffix per device.
BambuHelper-XXXX network from your phone or laptop.Either way, the device reboots, joins your WiFi, and starts monitoring the printer.
Capture a crash, a stack trace, or WiFi/TLS errors for a bug report.
Plug the board in over USB, click Connect, and pick the same serial port you'd use for flashing. Baud rate is 115200 to match the firmware.
Only one program can hold the serial port at a time - close PlatformIO Monitor or Arduino IDE first, and don't click Install during a monitor session.
Need more detail in the log? Open your device's config page in a browser, go to Diagnostics, and turn on Enable verbose serial logging. That streams MQTT and printer events over USB. Disable it again when you're done - it impacts performance.