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Topic:
MSC-400 Drops ~1 out of 10 RS232 commands?
This thread has 2 replies. Displaying all posts.
Post 1 made on Monday January 3, 2011 at 13:47
etc6849
Long Time Member
Joined:
Posts:
September 2010
62
I'm having a reliability issue with an URC MSC-400 and was hoping one of the more advanced users could give me some pointers.

I have a few serial devices I've created and then I generated the smartMacros. I then use an MX-900 remote to trigger the RS232 smartMacros.

Problem:
When you press the same button over and over about 1/10 presses fail to result in an RS232 string being sent from the MSC-400.

What I know:
No RF interference according to the RFX-250 red light.
Blue light on the MSC-400 indicates receipt of RF transmission for 10/10 presses.
I've verified the symptoms in hyperterminal (serial port properties match).
I've used live update to update to the newest MSC-400 editor.
I'm not using any delays, should I be?

Other notes:
What's even stranger is that if I go and alternate button presses, say I press UP then DOWN as fast as I can on the remote, every RS232 command is received successfully (verified in hyperterminal)! This by itself tells me my remote buttons are working and that there is no RS232 cable issue.
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Post 2 made on Monday January 3, 2011 at 22:40
Daniel Tonks
Wrangler of Remotes
Joined:
Posts:
October 1998
28,779
Not that this will help, but I have noticed random occasional issues with the same thing when simply relaying IR commands (not built-in triggers). However what I've seen is more like occasionally it will start to refuse to send a certain command, until it sees some other command, and then it goes back to normal. I think it might be a marginal noise issue combined with some sort of noise rejection code...
OP | Post 3 made on Friday January 7, 2011 at 17:16
etc6849
Long Time Member
Joined:
Posts:
September 2010
62
Thanks Daniel.

This sounds similar to my issue. I've found that sending two different consecutive smart macro triggers (I made the second trigger send a single carriage return with no text) fixes the issue. The problem is that smart macros take about 400 ms longer to execute than a single trigger that sends an rs232 command.
FREE Home Automation software called Premise: [Link: cocoontech.com]
[Link: cocoontech.com]


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