Hello everybody,
I'm trying to make a script bash to move a cam with servoblaster. when I strike a lettre (i,o,l,p) I would like increment or decrement a variable, to move the camera degree by degree or percent
My problem I can't adapt my command echo P1-11=90% >/dev/servoblaster to a variable to increase or decrease the nomber 90%. this is my code:
#!/bin/sh
#ServoBlaster
sudo /home/user/PiBits/ServoBlaster/user/./servod --p1=11,12
readkeyboard=`stty -icanon ; dd bs=1 count=1 2>/dev/null`
if [ "$readkeyboard" = 'o' ]; then i=$((i+1)) echo P1-11=$i >/dev/servoblaster #up
elif [ "$readkeyboard" = 'l' ]; then i=$((i-1)) echo P1-11=$i >/dev/servoblaster #down
elif [ "$readkeyboard" = 'i' ]; then i=$((i+1)) echo P1-12=$i >/dev/servoblaster #left
elif [ "$readkeyboard" = 'p' ]; then i=$((i-1)) echo P1-12=$i >/dev/servoblaster #right
fi
done
Thank you in advance for your help.
Finally I have found, This is my code:
#!/bin/sh
#echo p1-22=250 > /dev/servoblaster #angle
#echo P1-11=80% > /dev/servoblaster #pourcent
#ServoBlaster
#$i=90
#$s=90
sudo /home/user/PiBits/ServoBlaster/user/./servod --p1=11,12
while(true);do
readkeyboard=`stty -icanon ; dd bs=1 count=1 2>/dev/null`
if [ "$readkeyboard" = 'l' ]; then i=$((i+1)) ; echo P1-11=$i >/dev/servoblaster #up
elif [ "$readkeyboard" = 'o' ]; then i=$((i-1)) ; echo P1-11=$i >/dev/servoblaster #down
elif [ "$readkeyboard" = 'i' ]; then s=$((s+1)) ; echo P1-12=$s >/dev/servoblaster #left
elif [ "$readkeyboard" = 'p' ]; then s=$((s-1)) ; echo P1-12=$s >/dev/servoblaster #right
fi
clear
done