I am not familiar with the Ambient Weather devices. However, I have been working with some really smart OpenSprinkler collaborators and have found a way to get the data from my Davis Vantage Pro2 fed to OpenSprinkler for the Zimmerman calculation of water level. This involves implementing weather-server on some device, such as a Raspberry Pi, (See https://github.com/OpenSprinkler/OpenSprinkler-Weather) and utilizing existing Davis WeatherLink software capabilities (see the end of this thread: https://github.com/OpenSprinkler/OpenSprinkler-Weather/issues/41. I don’t know whether an approach similar to this will work. There is also another approach, doucumented at the OpenSprinkler-Weather thread, that involves intercepting a TCP/IP feed.