Recovery mode on TP-Link Archer C7 V4

Question

I'm trying to get my TP-Link Archer C7 V4 back after trying to flash the original firmware. I read in several places that it is possible to switch to recovery mode and flash firmware via a TFTP server by configuring the computer's network card to obtain 192.168.0.66 as the address. However, I can't get the expected result...

For my TFTP server I use https://github.com/lunixbochs/tftpd-cgi and I switch to recovery mode on the router because I have the power and WPS LEDs on.

I also renamed the firmware file to ArcherC7v4_tp_recovery.bin.

Below you can see the frames captured by wireshark Wireshark screenshot

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