Archived Boards and Threads > GlobalTop GPS Receivers and Modules

Weird baud rate

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mscaff:
Hi,

I just received a few modules for evaluation.
 I soldered one of them in my board and just started to watch it's output in minicom.
It's was all ok, when, after a power cycle, i was just receiving garbage.
After a few tests, i discovered with an oscilloscope that the original 38400 baud rate now is 24400bps, which is a completely weird baud rate. Even turning the module off, and waiting for a long time didn't help...
Does someone seen this before?
How can I change the baudrate of this module? Is that change supposed to be volatile or not?
If it is a command that i have to send to change the baud rate, how can i guess which is my initial baud rate?
My second module is working fine at 38400 so far.

Thanks, Mauricio
 

Horsa:

--- Quote from: mscaff on November 12, 2010, 12:16:54 AM ---I just received a few modules for evaluation.

--- End quote ---

Please tell us what modules and what firmware version(s). One way of getting the firmware version is through the MiniGPS tool.


--- Quote from: mscaff on November 12, 2010, 12:16:54 AM ---Even turning the module off, and waiting for a long time didn't help...

--- End quote ---

Did you disconnect physically every pins? VBackUp also?

mscaff:
Hi,

The module is a GTPA010,
I do not have the firmware version right now, I'll try to get it in the weekend.

And, the module was physically disconnected from the board and after that I even tried to short circuit the modules power supply pins to discharge any internal capacitors.

Yet, no luck.

Thanks, Mauricio
 

Horsa:

--- Quote from: mscaff on November 12, 2010, 05:46:35 PM ---The module is a GTPA010,

--- End quote ---
GTPA010 is the name of the integrated patch antenna, not of the module:
  http://forum.trenz-electronic.de/index.php/topic,51.msg71.html#msg71
Please have a look at the bottom side, not at the top one.

mscaff:
Under the module are those strings:

G.top
9803-PA6B-V01
2009/06
MV1194V-0-138-0

Thanks.

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