: Click Upgrade or Update . Do not refresh the page or disconnect the device until the process is 100% complete.
: Execute the firmware upgrade according to the manufacturer's instructions. This process might vary significantly depending on the device. aot4221sr firmware upgrade
. The device will typically take about 3 minutes to process and reboot. Critical Safety Tips Wired Connection : Click Upgrade or Update
Expected output: Found DFU: [0483:df11] ver=2200, devnum=... aot4221sr firmware upgrade
Wait for the SHA-256 match confirmation. A mismatch indicates a corrupted download.
A: Over UART at 921600 baud, approximately 45 seconds. Over OTA with a 100 Mbps link, about 2 minutes.
: Early versions of the AOT-4221SR firmware were notorious for causing delays when loading mobile apps, specifically WhatsApp statuses and certain media-heavy applications.