Check your manual for the default factory IP address and reconfigure your local network adapter properties to match.
Open a web browser and enter the default IP address (usually 192.168.1.1 or the address printed on the back of the device). aot4221sr firmware upgrade
For engineering samples or the official AOT4221SR Programmer’s Manual v2.2, contact AOS (Alpha & Omega Semiconductor) FAE support. Check your manual for the default factory IP
⚠️ The AOT4221SR enters bootloader mode only when the FW_UP pin is pulled high during power-on reset (POR). A standard I²C reset is insufficient. aot4221sr firmware upgrade
: Use a computer connected directly to the router via an Ethernet cable (LAN port 1 is recommended for full speed).