Of course our HVAC system needs a software update because the manufacturer found a bug after techs were fighting it for months. Of course.
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Yay: the manufacturer sent me their internal docs w/ all the register specs. Boo: the file (named "NewRS485Address-20170119-CX34UsedV2latest") is half Chinese, half English and sometimes the English docs are correct and sometimes Chinese is correct. Better than no docs, tho!
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Now that you've got access to Modbus and to the docs, what interesting apps could you build using the datastream? Could you, by monitoring the datastream, detect the need for maintenance before you notice it through a change in comfort levels?
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Maybe! I'd be happy if it heats reliably.
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In many states, heating/cooling is the second largest source of greenhouse gas emissions. (In NY 45% is from vehicles, 35% from HVAC, 20% from electricity generation) But, innovators have largely ignored HVAC. We need more innovation in HVAC device control and monitoring.
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