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Firmware update

Maintenance → Firmware → Check, download and update. The app compares the unit’s firmware with the one it carries and with the release channel; when the unit is up to date it can still reinstall the verified image.

Update firmware dialog asking to type UPDATE to confirmUpdate firmware dialog asking to type UPDATE to confirm
Simulator

After the download is verified the app asks to confirm: type UPDATE. You can cancel until the copy starts.

Maintenance page showing a completed firmware update with all steps passed

A completed update on a test unit: every step passed; configuration preserved; backup of configuration, identity, status, 42 records and the full flash image saved.

The steps

Section titled “The steps”

The guided update runs these steps, each shown with its result:

  1. Check the image: RP2350 ARM Secure format, flash window, SHA-256.

  2. Back up the unit: configuration, identity, status and every stored record are saved on the computer first.

  3. Reboot the unit into BOOTSEL (its bootloader).

  4. Wait for the unit to save its results, then for exactly one RP2350 bootloader: a unit in the middle of a session ends it and saves everything it holds in memory first (usually seconds, at most a few minutes).

  5. Save the full 4 MiB flash image (when the picotool helper is available): a complete copy for recovery.

  6. Copy the image to the bootloader volume.

  7. Wait for the same unit to come back (same serial number).

  8. Check the new firmware identity (version and build hash).

  9. Compare the configuration with the backup.

    Firmware card with the update steps, the first ones done and the reboot in progressFirmware card with the update steps, the first ones done and the reboot in progress
    Simulator

    During the update each step turns green when done; the current one is highlighted.

The final line says which firmware runs on which unit, that the configuration was preserved and what was backed up. Results stay on the unit.

Firmware card with every update step done and the final reportFirmware card with every update step done and the final report
Simulator

Done: every step green and the final line with firmware, unit and backup.

Recovery

Section titled “Recovery”

If something fails, the app says at which step and what to do. The unit always has a way back: holding the BOOT button while switching it on enters the bootloader (the procedure), and the update can be repeated.

SymptomWhat to do
Stuck in BOOTSELPower-cycle without holding BOOT, or run the firmware update.
Update failed after the copyHold BOOT while power-cycling, then update again.
Unit unconfigured after a resetLoad the saved configuration, review and save.
Status bar: compatibility warningThe firmware lacks features this app uses; update it.