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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Update: turns out our local contractor has been lying (not sure on purpose?), but I called the manufacturer and made my way to the developers responsible. They're still debugging. I let on that I was halfway technical and now they want me to collect Modbus traffic to help. GREAT
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Yay, I've got working Modbus control now! Also I didn't have to do much work, given all the
#golang packages already existing: https://godoc.org/?q=modbus ... I just picked the top one and it mostly worked. And looks like I might be able to detect the bug condition and power cycle.2 replies 0 retweets 19 likesShow this thread -
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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Replying to @bradfitz
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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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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