Update powerwall.sh

powerwall.sh

@@ -613,8 +613,8 @@ TEST(){
 	temptotal=0
 	while IFS=$'\t' read date sensorid temp hum ;do
 		# echo date:$date sensorid:$sensorid temp:$temp hum:$hum
-		echo "expr ${temptotal} + ${temp}"
 		temptotal=`expr ${temptotal} + ${temp}`
+		echo "- ${temptotal} + ${temp}"
 	done  < <(${mysql_conn} -se "USE servermonitor; SELECT date,sensorid,temp,hum from sensor_data WHERE sensorid=2 ORDER BY id DESC LIMIT 10000;")
 	
 	average=$(bc <<< "scale=2; ${temptotal}/10000")