Update powerwall.sh

powerwall.sh

@@ -18,6 +18,7 @@ GETTEMP(){
 	mqtt_message=`mosquitto_sub -h 10.10.1.180 -t tasmota/discovery/${SENSOR_MQTTID[$1]}/sensors -u homeassistant -P 12home34assistant56 -C 1`
 	echo $mqtt_message
 	echo $mqtt_message | cut -d':' -f 7 | cut -d',' -f 1 | read temp_c
+> 	echo "'$temp_c'"
 	if [ "$temp_c" != "null" ]; then
 		temp_f=`echo "scale=2; $temp_c*1.8 + 32" | bc`
 		echo "$temp_c -> $temp_f"