astronut Posted July 9, 2012 Share Posted July 9, 2012 Hi, I'm trying to control my thermostat(Venstar T1700) through PLM #2413U. I am able to get the status of the thermostat through my Perl script but I am not able to change the thermostat mode through the script. For e.g. when the thermostat is in off state and when I issue cool on command, I get the following reply and nothing happens. Tx => 026214.83.2b.056b05 Rx <= 025014.83.2b.aa.aa.aa.a16bfd 14.83.2b is the thermostat's device ID. If you see the Rx message, I get back "fd" in cmd2 position, which I don't understand. Could anybody help me understand what's wrong ? Thank you, AN Link to comment Share on other sites More sharing options...
LeeG Posted July 9, 2012 Share Posted July 9, 2012 astronut This is an ISY forum. These type questions should be posted on the Smarthome forum. The thermostat is an I2CS device which requires special link record processing to be able to control the thermostat from the PLM. The Rx <= 025014.83.2b.aa.aa.aa.a16bfd is a NAK because the required link records have not been established. You should consider purchasing a Developer Subscription from SmartLabs which will provide access to the confidential information needed to understand how to interface with an I2CS device. Link to comment Share on other sites More sharing options...
Brian H Posted July 9, 2012 Share Posted July 9, 2012 If the T1700 is new enough to be I2CS. I2CS modules started being released March 2012 but not all part numbers where released together and Smarthome didn't post exact dates even to us Developers Group Members. An fd in cmd2 is one of the I2CS protocol error messages. If yours is an I2CS Protocol T1700 Link to comment Share on other sites More sharing options...
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