Option to latch inputs

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jatracy
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Joined: Sat Jun 30, 2007 2:16 pm

Option to latch inputs

Postby jatracy » Mon Sep 17, 2007 2:41 pm

I would like to have the option to latch the individual inputs on the EZIO devices. Doing this would increase my comfort in using them in a security application. Right now I am reluctant to use them since I have not been able to reliably catch the input transitions with my software package.

simplehome
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Postby simplehome » Wed Sep 19, 2007 9:47 pm

The inputs are always available by reading the state of the input port at any time. Therefore, if the application does not catch the transition messages, a periodic poll (refer to command set document) would do the trick.

If you can not rely on the broadcast messages from the EZIOxx, you should be able to link a responder device that simply takes the group commands from the EZIOxx and passes them to an application.

jatracy
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Joined: Sat Jun 30, 2007 2:16 pm

Postby jatracy » Thu Sep 20, 2007 8:06 am

simplehome wrote:The inputs are always available by reading the state of the input port at any time. Therefore, if the application does not catch the transition messages, a periodic poll (refer to command set document) would do the trick.


For one, I have seen the EZIO return 0xFF when polling the input status. Also, For a security application, you would need to poll at a rate much faster than a powerline is capable of sustaining (unless the inputs are latched). I am currently polling at once per minute which is fine for a garage door, but for an entry door someone could easily open and then shut the door within 1 minute. Granted it would be rare, but we are talking about a security application! I would not be comfortable installing a security system that only works most of the time!

simplehome wrote:If you can not rely on the broadcast messages from the EZIOxx, you should be able to link a responder device that simply takes the group commands from the EZIOxx and passes them to an application.


Also, I do not want to have to go through the multiple button presses to link every input to some other responder. I could concievably look into automating this, but I would still need to have an extra Insteon responder. Would another PLM work? I would always have anouther PLM for HomeSeer to interface to the powerline.

reswobslc
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Joined: Thu May 01, 2008 11:23 pm

Postby reswobslc » Fri May 02, 2008 4:43 pm

What if you programmed your EZIO so that the INPUT pin simply drove an OUTPUT, with a timer to turn the output off automatically after a certain number of seconds, and to ignore the On-to-Off transition. Then you can simply just read the status of the output and clear it yourself or let the timeout take care of it, knowing that the briefest of activation will be detected.


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