Firmware v2.0.3+ and a configured MQTT broker.
The AOT4221SR firmware upgrade is a straightforward but critical maintenance task. Using the DFU method with verified binaries and following post-upgrade validation ensures minimal downtime and preserves system integrity. Always test the upgrade on a non-production unit first if available. aot4221sr firmware upgrade
A: No, provided you do not erase sector 0x0801E000-0x08020000. The aotflash_cli tool preserves this by default unless you use --full-erase . Firmware v2