HAI Communicating Thermostat source code?

I'm trying to learn how to communicate with my thermostat using RS232. Unfortunately, so far I have been completely stymied. Does anyone have some sample source code that could help me get started? The very easiest possible example would, I'm sure, be enough to get me going. I don't even care much what language it's in. I'm about 80% certain I've got the cabling right, but I can't get a response from the thermostat no matter what I try.

Thanks in advance! Brad.

Reply to
Bradley Plett
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I don't have the control codes but the communications format is bi-directional, one start bit, eight data bits, one stop bit NRZ,

300-baud. At least, that's the default setup on one model.
Reply to
Robert L Bass

hi this is some info for you to start ,and look at a linux or win ver of misterhouse in a driver for hai thermostat "omnistat.pl" >hai rc thermostat rs232 cable pinout and protocol and test program >

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Omnistat Serial >Protocol r4-98C.pdf

dusan

Bradley Plett wrote:

Reply to
dusan

The protocol is _supposedly_ available from the HAI web site at

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Reply to
Robert L Bass

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