Hi, Say I have device /dev/ttyACM0. If I `stty -F /dev/ttyACM0 raw`, then `cat /dev/ttyACM0` in one term, and `echo -e "QUERYCOMMAND" > /dev/ttyACM0` in another term. I would get the data in first term.
But if echo first, then cat. The data seemed lost. Cat would not get anything. So I think these two commands must be run at the same time. So I put this process be in a script like this: (stty -F $tty raw currentSettings="" while [ 1 ] do c=`dd if=$tty count=1` currentSettings=${currentSettings}${c} if [ c == '.' ] then break fi done echo -n $currentSettings > $conf) & echo -e "${query}?." > $tty until [ -e $conf ] do sleep 1 done currentSettings=`cat $conf` The script stuck at dd, it did not get anything. What should I do? -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com.