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RE: Re: [Paparazzi-devel] LEA-5H Module Freeze after 30 seconds

From: address@hidden
Subject: RE: Re: [Paparazzi-devel] LEA-5H Module Freeze after 30 seconds
Date: Tue, 22 Apr 2008 17:31:15 GMT

The tunnel code is pretty simple, though it has been known to have an occasional bug.  You can easily see if the GPS is still running by looking for activity on the TX pin of the u-blox chip with a volt meter.  But I'd suspect something strange in your PC software before suspecting the tunnel code.

u-blox claims a 30 second time to first fix, maybe what you're seeing is related to the extra data from the fix.  Did you increase the baud rate to ~56K?  Did you turn off NMEA?  Have you tested the default config (NMEA, 9600, 1Hz, etc.)?

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Hi Martin,

Very good to know. Maybe Paparazzi does something with this at 30sec and 
freezes the tunnel and not the LEA-5H freeze? I just saw u-center stop 
responding but that could have been the LPC freeze not the LEA-5H.

This is a good example where not having the option in software for NMEA is 
going to be a problem. LEA-4P will not be available forever. This is why I 
chose to test the LEA_5H.

Can I help in some way?

David Conger

From:     Martin Mueller <address@hidden>
Date:     4/22/08 16:19Subject:  Re: [Paparazzi-devel] LEA-5H Module Freeze 
after 30 seconds

Hi David,

> On the downside. After many tests it freezes exactly 30 seconds after power 
> on every time. It exactly 30 seconds every time. I did many tests to be sure.
> Also, it will freeze instantly upon dong any "send" command. Change any 
> setting and hit "send" it will lock up.
> Any ideas? This module is amazing. Compared to an LEA-4P it seems a huge leap 
> in sensitivity...there's just this little issue of only working for 30sec to 
> overcome ;]

the 4->5 migration application note says that the
current LEA-5 software has "No UTM (Universal Transverse Mercator
Projection)." This is probably not related to that 30s issue but means
that we need some conversion for Paparazzi.


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