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Troubleshooting Guide
27
Communications Problems
? Why can't the WeatherLink software communicate with the data logger and
station?
If you are having trouble establishing communication between Weather-
Link and the Weather Envoy, start by checking the weather station's own
diagnostics. Remove all power to the Weather Envoy and then restart it by
restoring power with the data logger still attached.
Note: The data logger uses non-volatile memory, so you won’t lose any data you’ve already
recorded.
• You should hear two beeps, each of which occurs when the weather station
passes one of its diagnostic tests. Each beep follows the previous after about a
second. The first beep tells you the processor is running. The second beep veri-
fies the installation of the data logger. If you do not hear two beeps, contact
Davis Instruments at 510-732-7814.
• If you hear both beeps, see Finding the Correct Serial Port on page 28 for
instructions on checking your standard serial ports. If this identifies a serial port
other than the one you selected in station setup, try connecting to the data logger
again.
Note: Generally, if the loopback test identifies a serial port, your PC will be okay.
• Remove any extension cables that are in the system.
• Make sure you are using the blue serial port adapter supplied with WeatherLink
for Vantage Pro. The older, black Davis serial adapters will not work.
If you still cannot connect or if the loopback test does not identify any
serial ports, eliminate the following possibilities. If you have questions
on how to proceed, contact your PC vendor or PC technical support.
• You have a hardware device conflict.
Check the device manager tab in the Windows® system properties
dialog box to ensure that Windows recognizes your COM port. Consult
your pc’s documentation to see how to access the system properties
dialog box.
• Your serial port uses a non-standard device name.
WeatherLink recognizes serial ports named COM1 through COM10
only. To use a modem, you must specify the underlying COM port on
your PC. To find out which port the modem’s connected to, you can
look in Windows’ System Properties > Device Manager > “modem
name” Properties > Modem > Port, where “modem name” is the name
of the modem you have installed.
• Your serial port is defective.
• The loopback connector or the WeatherLink adapter plug is bad.