luftdaten: fix timestamp

luftdaten/scrape.rb

@@ -8,6 +8,7 @@ SENSOR_LOCATIONS = {
   44132 => "Wurzelwerk Tunnel",
   44133 => "Wurzelwerk Tunnel",
 }
+TIME_PRECISION = 's'
 
 data = JSON.parse open("https://data.sensor.community/static/v2/data.json").read()
 
@@ -27,10 +28,10 @@ data.each do |d|
         sensor_type: d["sensor"]["sensor_type"]["name"],
       },
       values: values,
-      timestamp: Time.new(d["timestamp"]).to_i
+      timestamp: InfluxDB.convert_timestamp(Time.parse(d["timestamp"] + " UTC"), TIME_PRECISION),
     })
   end
 end
 
 db = InfluxDB::Client.new(url: "http://grafana.hq.c3d2.de:8086/luftdaten")
-db.write_points points, 's'
+db.write_points points, TIME_PRECISION