How to upload a file onto IP camera via serial UART conection

Place the uploading file, e.g. ipctool, into the home directory. Run screen 115200 /dev/ttyUSB0 and sign in into Linux shell.

On the camera:

cd /tmp
rx ipctool

press Ctrl-a, then :, type in exec !! sx ipctool. After uploading completed, run

chmod +x ipctool
./ipctool