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Re: [gpsd-users] gpsd:WARN: PPS TIOCMIWAIT returns unchanged state, ppsm

From: Charles Curley
Subject: Re: [gpsd-users] gpsd:WARN: PPS TIOCMIWAIT returns unchanged state, ppsmonitor sleeps 10
Date: Tue, 2 Jul 2013 13:58:30 -0600 
On Tue, 2 Jul 2013 12:06:26 -0700
"Gary E. Miller" <address@hidden> wrote:

> > According to the manual it is TIA-232-F which according to wikipedia
> > is true rs232.  
> 
> Put a voltmeter or a scope on it.  I can count on one hand the number
> of people I have met that have actually read that spec.  Unless it
> explicitly says +/-12V you do not know.

I have also read that alleged spec. Everything is considered
"advisory", including the notion that the people who wrote it could
communicate at all. Nope, a scope or VM is the only way to go. Check it
with the cable plugged in and unplugged.

-- 

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