Loss+of+Communication,+VantagePro+and+VantagePro2

Problem
I have a Vantage Pro or Vantage Pro2 weather station, and it periodically loses communication to Virtual Weather Station.

Discussion
There are a couple of known problems related to this issue. Based on the type of data logger interface you are using (USB vs. serial), please reference the following troubleshooting solutions.

USB
> https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx > Beta Version Instructions
 * 1) Turn off all USB power save features. Select the **Windows Control Panel**, **System**, **Hardware**, **Device Manager**, **Universal Serial Bus controlllers**, and select the plus (**+**) sign to view all of the USB controllers. You should see several **USB Root Hub** entries. **Right click** on each entry (unless you know which one is correct), select **Properties**, and under the **Power Management tab**, **uncheck** the selection to **Allow the computer to turn off this device to save power**.
 * 2) Download the latest USB to serial bridge adaptor driver here:
 * 1) The converter does not use USB drivers to communicate to the computer, but implements a USB to serial converter and associated driver software. This driver software has been known to drop communication on certain computers for about 1% of the installations. Davis has not addressed this problem yet, but the only way to fix this issue is to unplug the USB adaptor, plug it back in and restart the software. Another solution is to exchange the data logger for the serial version and use a more standard USB to serial converter offered [|here]. We recommend calling Davis technical support at 510-732-7814 to exchange the 6510USB for the 6510SER if it is still under warranty (1 year).
 * 2) This issue may be related to power save turned on your computer. To turn off all power save features, select your Windows **Control Panel**, and switch to classic view if you are running Windows XP. Select **Power Options**, and change the power scheme to **Always On** and the other options **to Always On.** Next, select the Hybernate tab and uncheck the **Enable Hybernation**.
 * 3) Try upgrading the latest version, which includes a new VantagePro DLL:

Serial and USB
There was a known issue with the Vantage Pro DLL function that will not retrieve the archived daily highs and lows. The DLL function will not timeout. Therefore, the software must be restarted. This issue was fixed in Version 13.00 or greater.