finished bracketting

		*) echo "Invalid ISO" >&2; return 1;;

	esac

	echo '{"param":"'$ISO'","msg_id":5172,"btwifi":2,"token":'$TOKEN'}'

	echo '{"param":"'$ISO'","msg_id":5172,"token":'$TOKEN'}'

	get_JSON # await "ISO was set"

}

set_shutter_speed() {

	[ $# -eq 1 ] || {

		echo 'Usage: set_shutter_speed <Auto|value>' >&2

		false

	}

	shutter_speed="$1"

	case "$shutter_speed" in

		Auto|auto) shutter_speed=0;;

		1/6400|1/3200|1/2000|1/1000|1/500|1/240|1/120|1/60|1/30|1/15|1/8|1/4)

			shutter_speed="$(echo "$shutter_speed" | sed 's,1/,,')" # remove "1/"

			shutter_speed="$(expr $shutter_speed + 32768)"

		;;

		1|2|4|8|12|16|20|24|28|32);;

		*) echo "Invalid shutter speed" >&2; return 1;;

	esac

	echo '{"param":"'$shutter_speed'","msg_id":5171,"token":'$TOKEN'}'

	get_JSON # await "shutter speed was set"

}

# Commands to run on the camera

commander() {

	get_token

	set_ISO 50

	for ss in 1/1000 1/120 1/15 1; do

		set_shutter_speed $ss

		shoot

		sleep 0.8

		#sleep 0.6 # too short ... causes rval -21

		#sleep 0.725 # OK

	done

	#set_shutter_speed 2

	#shoot

}