fix: too many open files close with influxdb connection

CHANGELOG.md

@@ -7,6 +7,10 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 
 ## Unreleased
 
+### Fixed
+
+- too many open files close with influxdb connection
+
 ## v1.0.0 - 2019-08-14
 
 ### Added

weather.go

@@ -80,6 +80,7 @@ func (w *Weather) SendToInfluxDB() error {
   if err != nil {
     return err
   }
+  defer conn.Close()
 
   bps, _ := influx.NewBatchPoints(
     influx.BatchPointsConfig{