Davis Weather Stations and WeatherCat
Compatible Davis Hardware
WeatherCat is able to obtain data from the following weather station models from Davis Instruments:
- Vantage Vue
- Vantage Pro-2 product line, including the Weather Envoy
- Complete Weather Monitor II (discontinued)
- Weather Wizard III (discontinued)
- Vantage Pro (discontinued)
- Install the current SiliconLabs USB-to-serial bridge driver for MacOS.
- Power off your Davis console - remove batteries and AC adapter
- Plug the data logger into the console and plug the USB cable into the Mac. On a USB-C Mac, you'll need a hub, CalDigit box, etc. that has traditional USB ports.
- Power up the Davis console.
- Launch WeatherCat. If it was previously configured for another device, you need to use the "Configure Comms & Exit" button first and then re-launch WeatherCat.
- In WeatherCat, select the Davis Vantage family hardware group and set the comm port dropdown to /dev/cu.SLAB_USBtoUART . If that device isn't present in the list, you may need to reboot the Mac.
Davis Data Logger Required
In order to connect your Macintosh WeatherCat to a Davis Vantage station (either the Vue or Vantage Pro-2 line) you need one of the Davis data loggers. These are hardware interfaces that plug into a Davis console or Weather Envoy and have a cable for connection to a computer. There are two usable choices:
- The USB data logger: WeatherLink USB Data Logger (Part #: 6510USB)
- The now-discontinued IP data logger: WeatherLinkIP™ for Vantage Stations (Part #: 06555)
The WeatherLinkIP ethernet data logger was discontinued sometime around the beginning of 2020, so for new installations you need to buy the USB WeatherLink.
Davis WeatherLink Software Still Needed for Some Operations
You do *not* need to run the Davis WeatherLink software in order to set up a new Davis Vantage product connected via the WeatherLinkUSB logger. You can just run WeatherCat - a new data logger will come up in USB-to-serial mode.
However, for the present, the Davis WeatherLink software is required for a number of tasks not yet supported by WeatherCat like adjusting the baseline values of a Davis Weather Envoy. The WeatherLink software must be downloaded from WeatherLink.com (free account required). Windows and Mac versions are available.
Data Logger Direct USB vs Serial Configuration
The information here applies if you have a USB data logger that was previously set into direct USB mode for use with the Davis software on a Windows computer, or if you want to use your Davis system with both Windows and Mac software.
Formerly there were separately versions of the USB data logger for Windows and Mac, and the dongle needed to be reprogrammed to switch between system types. There is now only one version of the USB logger, which can be configured for direct USB (for Davis WeatherLink software) and USB-to-serial bridge mode for WeatherCat and other 3rd party software. Davis recommends that if you need serial mode, that it be configured when the logger is first set up. It can be reconfigured back to direct USB, but you need to use a separate utility for this.
Comparison of Davis USB and IP data loggers
We have compiled a list of the trade-offs between the Davis USB and IP data loggers:
For the Davis USB data logger, you'll need to download the latest SiliconLabs USB-to-serial bridge drivers to emulate serial communications on the USB interface. See Obtaining the latest drivers for use with Davis data loggers .
Troubleshooting and general tips for users of Davis Vantage Pro-2 and Vantage Vue stations:
Additional resources for troubleshooting Davis weather stations
Davis Weather Support page This page includes links to the Davis knowledge base, downloadable documentation, software updates, hardware specifications, installation guides and much more.
Davis Instruments channel on YouTube This is the company presences on YouTube and includes general interest videos, but also includes videos on performing repairs to your Davis instruments.