WeatherLink IP and USB-or-Serial Data Logger: You can set your reading interval to 1 min, 5 min, 10 min, 15 min, 30 min, 1 hour, or 2 hours. This data is uploaded to our server every hour (Example: WeatherLink IP with 15-min interval will send up data every hour with 4 sets of readings. While a 30-min interval will be sent every hour with 2 sets of readings.) You can set the interval in your console or your WeatherLink PC Software. Vantage Connect and EnviroMonitor: Your data upload interval depends on your subscription plan -- 5 min, 15 min, or 60 min.