With putty it (ctrl+u) works. I set 115200 speed in putty for serial connection and try to firmware with this version NVR_K41_BL_ML_STD_V3.4.96_170921.zip
U-Boot 2010.06-svn (Jun 09 2015 - 18:34:20)
Hit ctrl+u to stop autoboot: 0
This program will upgrade software...
Hi people
After exploit in cams firmware i’ll tried to update all of my network... firmware one of nvr’s is don’t start now, 15 beeps and reboot
On RS-232 in HyperTerminal:
"you device is illegal, please call factory"
U-Boot:
Write help and i see the list of commands
When i press ctrl+u...