register date of last ph calibration

LeClubSandwichStudio / LaCOOLBoard

Arduino library & sample sketches for La COOL Board, the open-source, open-hardware environmental monitoring and control device

http://www.lacool.co

MIT License

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register date of last ph calibration #164

Closed gui4d closed 6 years ago

gui4d commented 6 years ago

save the date of the last ph calibration in json file. new function : void Irene300::readLastCalibrationDate(JsonObject &root); send online the last calibration date. send 0000-00-00T00:00:00Z if none occurred