Update powerwall.sh

powerwall.sh

@@ -85,6 +85,8 @@ CHECKTEMP_SERVICE(){
 				
 				QRY="USE servermonitor; INSERT INTO sensor_data (\`sensorid\`, \`date\`, \`temp\`, \`hum\`) VALUES ('${SENSOR_ID[$1]}','${datetime}','${temp_f}','${temp_h}')"
 				${mysql_conn} -e "${QRY}"
+			else
+				echo "($datetime) ERROR reading temperature" | mail -s "${1} ERROR" $email_alert
 			fi
 	    done
 	    sleep 10