Replies to This Discussion

Permalink Reply by Shirshak sengupta on April 12, 2012 at 8:06am

I will try it and let you know. Btw the standard firmware will give me NMEA output?

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Permalink Reply by Shirshak sengupta on April 12, 2012 at 11:42am

hey jason! there is another small problem. I can't find a download path for globaltop flash tool. could you send me the link?

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Permalink Reply by Ken on April 13, 2012 at 5:26pm

This is not correct.

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Permalink Reply by Ken on April 13, 2012 at 5:25pm

You do not mention what data rate you have set the serial port on the Arduino.

If you tried 9600bps because that is what the "generic" MTK-3329 manual says, that won't work.

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If you bought the unit from DIYD, it will come programmed to talk NMEA at 38400bps. 

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Do NOT re-flash the unit. It will output NMEA unless commanded into binary by the Arduino.

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Permalink Reply by Shirshak sengupta on April 14, 2012 at 9:34pm

I have attached the code in the previous  discussions. Yes i have used 4800 but still it gave gibberish output.I went to the site from where I bought this module and it was written that it gives binary output by default(38400) but using standard mtk command I can change my output to NMEA. check this link out http://store.diydrones.com/MediaTek_MT3329_GPS_10Hz_Adapter_Basic_p.... I tried everything possible but couldn't get it working. I think I haven't used the proper syntax to change the output to NMEA. If you can just send me the syntax for changing its working to NMEA.

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Permalink Reply by Ken on April 15, 2012 at 4:31am

>I have attached the code in the previous  discussions.

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>Yes i have used 4800 but still it gave gibberish output.I went to the site from where I bought this

>module and it was written that it gives binary output by default(38400) but using standard mtk

>command I can change my output to NMEA.

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What site did you buy it from? If it is not DIY Drones, then I can not help you. There are too many possible  variations of the firmware.

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>check this link outhttp://store.diydrones.com/MediaTek_MT3329_GPS_10Hz_Adapter_Basic_p.... >I tried everything possible but couldn't get it working.

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I am aware of the DIY drones store MT3329. I own about 6 of them. Is that the one you have? You are not being clear.

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>I think I haven't used the proper syntax to change the output to NMEA.

>If you can just send me the syntax for changing its working to NMEA.

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Serial.print( "$PGCMD,16,1,1,1,1,1*6B\r\n" );

It is documented in the pages linked to the DIY store.

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Permalink Reply by Shirshak sengupta on April 15, 2012 at 7:49am

I haven't directly bought it from diydrones but from tenettechtronics. They are a reseller. They don't change the firmware which is there in the mtk module. When i go to their site and check for a link on mtk 3329 it redirects me to the diydrones site. so I came to the above conclusion.

I am attaching my code and the output.Regards

shirshak

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Permalink Reply by Andre S on April 15, 2012 at 8:07am

Hi, have you tried via a proper hardware serial port? I've had problems with the software serial library earlier.

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Permalink Reply by Shirshak sengupta on April 15, 2012 at 8:09am

@Andre S: yes i have tried out the hardware serial port too. I got the same output!!!

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Permalink Reply by Shirshak sengupta on April 15, 2012 at 9:11am

Hey guys! I am finally getting my output.

pin configuration-

gps vcc- arduino 5v

gps gnd- arduino gnd

gps out- arduino rx

I am attaching the code.

Thanks for all your replies and special thanks to Andre S who made me reconsider the hardware serial port :)

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Permalink Reply by Ken on April 15, 2012 at 1:40pm

Good to hear that it is working. I haven't used the newsoftserial for a couple of years because of bugs, but I thought I'd read they'd been fixed. Maybe I'm thinking of someone-elses newer-newsoftserial?

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Remember, if you still intend to send commands to the gps, you'll need to connect the Arduino's tx to the GPS rx.

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