Telink B91 USB Flasher
Web Serial port of cdc_ota_tool.py — app / ESP32 / bootloader updates over USB-CDC, plus one-click old-device migration
B91 app firmware
B91_module.bin
B91 prod firmware
B91_module_PROD.bin
B91 bootloader
B91_bootloader.bin
ESP32 firmware
focus-v-firmware-wifi-esp-idf.bin
Connect (USB)
Open monitor
Reset → DFU
Reboot → App
Update B91 App (DFU)
Update B91 Prod (DFU)
Update Bootloader (via App)
Update ESP32 (DFU)
Migrate old device (BL → App)
Idle
PC log
Device log