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ArduinoSoilH2O GitHub repository - contains firmware and documentation files from 2017 through 2022
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Latest Gateway and Node Users Guide download link - last updated July 25, 2022. Describes how to use menus, download data, data string structure, and general installation instructions and troubleshooting tips.
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PSA On-Farm: Instructional Guide to the Gateway and Node Wireless Data Logging System
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