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ModeratorPermalink Reply by John Church on July 18, 2010 at 1:24pm

How long have you let it sit powered up? My UBLOX took a while to get a fix initially... Oh, and the correct port to be using is the one on ArduPilot Mega board... :)

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Permalink Reply by Ken on July 18, 2010 at 5:21pm

I've let it set for many minutes... After about 30 seconds, the red led on the EM406 starts to flash about once per second - does this indicate a signal lock?

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Permalink Reply by hopslink on July 18, 2010 at 2:58pm

Ken,

There doesn't look to be any code for EM406 in the mega libraries. You may get it to work in NMEA mode, but there is no specific initialisation code. You would need to do your own init to set the output to NMEA @38400.

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Permalink Reply by Ken on July 18, 2010 at 5:19pm

When you say do my own init, are you talking about in the setup function in GPS_NMEA? I tried doing "serial.begin(38400)", but still no GPS output in the serial window except for "GPS NMEA library test" message at startup...

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Permalink Reply by hopslink on July 19, 2010 at 12:28am

Sorry, that was slightly unclear. The GPS_NMEA setup function looks to simply set up ArduPilot.

There is no code to initialise the GPS unit to the correct baud rate etc. I meant you would have to provide your own initialisation code to set the GPS to output NMEA strings at 38400.

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ModeratorPermalink Reply by Morli on July 19, 2010 at 2:11am

Ken, I think only Ublox is supported in APM for now if i am not mistaken. So EM-406A won't initiate without the required code

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Permalink Reply by Ken on July 19, 2010 at 7:45am

OK, I see. I think I'll get the Ublox and try that.

Thanks to everyone for their help!
Ken

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