Using daily published ET data instead of Weather Underground?

[dlsen]

The local university publishes daily ET data, including lawn watering requirements.

The data is available at this site: Phoenix Area Turf Water Use Report

How would I go about setting up OpenSprinkler to use this data instead of the Weather Underground data?

[Ray]

You will have to modify the firmware code to use custom weather data. You can start looking at weather.cpp:
https://github.com/OpenSprinkler/OpenSprinkler-Firmware/blob/master/weather.cpp
this is where the firmware sends weather requests and get back results. The “scale” parameter, in particular, carries the watering percentage. You can write a python script that retrieves the daily ET data, calculates the watering percentage, and modify weather.cpp to call that script instead of the default weather script on opensprinkler server.

[dlsen]

Thanks Ray, I will give that a try. I have the OpenSprinkler 3.0, should I modify the Unified firmware, or is there a specific firmware and weather.cpp for the OS3.0?

[Ray]

It’s unified firmware — the same firmware is compiled for all opensprinkler hardwares.

[Author]

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