TCP connection on 192.168.4.1:8000
sudo socat -v -x PTY,link="/dev/W806",raw,echo=0,group-late=tty,mode=660 TCP4:192.168.4.1:8000,nodelay,tos=7
TCP connection on 192.168.4.1:8001 and 192.168.4.1:8002 for U1 and U2 respectively
sudo socat -v -x PTY,link="/dev/UPDI1",raw,echo=0,group-late=tty,mode=660 TCP4:192.168.4.1:8001,nodelay,tos=7
sudo socat -v -x PTY,link="/dev/UPDI2",raw,echo=0,group-late=tty,mode=660 TCP4:192.168.4.1:8002,nodelay,tos=7
curl --data-binary @W806.fls http://192.168.4.1/upload/w806
curl --data-binary @flash.bin http://192.168.4.1/upload/attiny/1
curl --data-binary @flash.bin http://192.168.4.1/upload/attiny/2