Stuart Jansen wrote: > #!/bin/bash > DELAY=10 > DEVICE="/dev/ttyUSB0" > > printf '\xFF\x01\x01' > "$DEVICE" # Power off > sleep "$DELAY" > printf '\xFF\x01\x00' > "$DEVICE" # Power on Commit rejected. Never name a variable that has anything to do with time without using the units in the name: -DELAY=10 +DELAY_SECONDS=10 :) --Dave