#!/bin/bash

if [[ $# != 1 || $((-(-$1))) != $1 ]]; then
	echo "Usage: $0 cnannel [!0-7 == all off]" >&2
	exit 1
fi

CMD="0"
[[ $1 -ge 0 && $1 -le 7 ]] && CMD=$((1 << $1))

echo "send $CMD"

i2ctransfer -y 6 w1@0x70 $CMD
i2cdetect -y -r 6