Aot4221sr Firmware Upgrade -

CLI (if supported)

| Error | Symptom | Recovery Action | |-------|---------|------------------| | | No ACK at 0x40 after POR | Check FW_UP timing – must be high ≥2ms before VDD stable | | Flash verify error | CRC mismatch at address 0x1200 | Retry with reduced I²C speed (100 kHz instead of 400 kHz) | | Device unresponsive | SDA stuck low | Apply 12V to RST pin for 100ms (factory reset condition) | aot4221sr firmware upgrade

After a successful reboot, run these commands to ensure full functionality: CLI (if supported) | Error | Symptom |

If you are experiencing issues and want to ensure your device is on the latest version: Access the Web Interface Connect your computer to the router via Ethernet or Wi-Fi. Open a browser and navigate to aot4221sr firmware upgrade