Using the reference Python script aot_upgrader.py :
Always use official sources to avoid security risks or hardware failure: aot4221sr firmware upgrade
: Click "Choose File," select your downloaded firmware, and click Upgrade/Upload . Using the reference Python script aot_upgrader
| Version | Release Date | Changes | |---------|--------------|---------| | 1.3.0 | 2025-02-10 | Adds CAN FD support, fixes Modbus TCP timeout bug | | 1.2.1 | 2024-09-01 | Security patch for bootloader (CVE-2024-1234) | | 1.2.0 | 2024-01-15 | Initial production release | " select your downloaded firmware
: Select the "Firmware Upgrade" option. If an automatic update isn't available, you may need to request the latest .bin file from your ISP's support.