Dir-860 flash firmware over serial

is it possible to flash the openwrt Firmware over serial?
I have See, that everyone can connect to the Router with a serial TTL adapter.
Over tftp the Firmware can Download over lan in the RAM an then it can be flashed to the nand.
I didnt Know the commands to so that.


but it's not required - https://openwrt.org/toh/d-link/dir-860l_b1

make sure you have the correct revision of the router.

i think the Router ist bricked.
For 10 Seconds the orange Led light an then it blink every second and it didnt CAME in recovery Mode.
How i can flash the openwrt Firmware to the nand, If i have a Connection with serial to it.

Post the serial output of when you try to go into recovery.

Hello, this is the output from serial:

and i can do nothing

Do nothing, as in unable to interrupt the boot process?

now i have flashed the openwrt firmware via lan with following command:
curl -v -i -F "firmware=@openwrt-21.02.1-ramips-mt7621-dlink_dir-860l-b1-squashfs-factory.bin"
The lan cable was broken.

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