<https://forum.armbian.com/topic/3730-wiringop-on-opi-zero/#comment-33790>
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"The thread is a little bit hijacked but of course interessting for others. \n \n\n\n\n\n\tAssume that your coffee contains mostly water (the fact that you wrote everything in °f instead of °C tells me, that you're US-citizen right? so your coffee should contain much more water than mine  ) heat capatizity and enthalpy of vaporization should be similar to water. So I would assume that all the testing could be done with water (I think this is the first time that I think about thermodynamic issues outside an exame -  \n\tI never expected, that this would help me or others somehow). \n\tWhat I learned from real life expirence: as soon as you have automated processes, people trust that everything works. Redundance on software- &amp; on hardware-side is a must! E.g. analog readings for the thermocouple can be false, software can hang in a  loop cause something wasn't programmed properly etc..\n \n\n\n\t \n \n\n\n\n\n\t \n \n\n\n\tIf you're interessted in Node-Red on armbian maybe my thread can give you some inspiration.  Sending data from arduino via cheap NRF24l01 or RFM69 trasmitters to mqtt-broker on OPi Zero should also be possibe.\n \n"
<https://forum.armbian.com/topic/3730-wiringop-on-opi-zero/?tab=comments>