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dkrishna92 / ardupilot-mega

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No GPS lock with EM406 #57

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1.EM406 plugged into APM GPS connector
2.Board powered through receiver and plugged in to mini USB
3.Wait for GPS lock

What is the expected output? What do you see instead?
GPS LOck but none obtained, LED C is flashing RED.

What version of the product are you using? On what operating system?
1.0.3 - windows 7

Please provide any additional information below.
APM + OilPan

Original issue reported on code.google.com by p...@hecklesrc.co.uk on 28 Aug 2010 at 11:45

Attachments:

GoogleCodeExporter commented 9 years ago 
The EM406 is not currently supported in binary mode. If you want to use it, 
switch it into NMEA at the correct baud rate and select the NMEA parser

Original comment by analogue...@gmail.com on 29 Aug 2010 at 12:23

GoogleCodeExporter commented 9 years ago 
Hi,

How can i tell what mode it is in and if it is in binary how do i set to NMEA 
and correct board rate
Regards,Tony

Original comment by p...@hecklesrc.co.uk on 29 Aug 2010 at 1:04

GoogleCodeExporter commented 9 years ago 
Hi,
Made a cable to connect EM406 to FTDI (usb).  Used SirfDemo to change mode of 
406 to NMEA @ 38400 Baud.  
Everything good now got good lock but altitude reporting wrong 
Regards,
Tony

Original comment by p...@hecklesrc.co.uk on 30 Aug 2010 at 1:35

GoogleCodeExporter commented 9 years ago 
Tony, please describe how the altitude is being reported wrong (eg high by a 
factor of 10).

Original comment by dewei...@gmail.com on 30 Aug 2010 at 5:04

GoogleCodeExporter commented 9 years ago 
Just made a new 406 lib, but need testers/coders to verify it works.

Original comment by jasonshort on 1 Sep 2010 at 5:36

GoogleCodeExporter commented 9 years ago 
What would be the prefered GPS unit to give the most accurate positioning 
information??
And most supported??
Regards,
Tony

Original comment by p...@hecklesrc.co.uk on 5 Sep 2010 at 8:40

GoogleCodeExporter commented 9 years ago 
@Tony - Ublox at this time.  We concentrate support on ublox and mtek.  Ublox 
will give better performance.

Original comment by dewei...@gmail.com on 10 Sep 2010 at 3:27

GoogleCodeExporter commented 9 years ago 
SiRF library was tested with an EM411/USB hacked into an EM406.

Altitude reporting was typical for a stationary GPS - wildly wrong at lock (+/- 
50m), improving with time to +/-20m or so.  

Can you clarify how far off your unit was reporting?  If you're not using it 
anymore, please let us know.

Original comment by DrZip...@gmail.com on 22 Sep 2010 at 7:07

GoogleCodeExporter commented 9 years ago 
Mike to test that EM411 works with Doug's changes and close.

Original comment by DrZip...@gmail.com on 27 Sep 2010 at 4:45

GoogleCodeExporter commented 9 years ago 
Does the 1.0.0 Release support both NMEA and SiRF Binary mode for EM-406A GPS 
now?

Thanks!

Original comment by wangz999...@gmail.com on 12 Dec 2010 at 2:23

GoogleCodeExporter commented 9 years ago

Original comment by analogue...@gmail.com on 2 Jan 2012 at 9:18