Comments on: TinyGPS http://arduiniana.org Arduino wisdom and gems by Mikal Hart Thu, 02 Feb 2012 11:22:38 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: UrSuS http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25430 UrSuS Wed, 01 Feb 2012 19:44:33 +0000 http://sundial.org/arduino/?page_id=3#comment-25430 @Mikal, 2. Do you mean $GPGGA sentence? The 7th value of the sting "Horizontal Dilution of Precision (HDOP)" (After fix quality and number of satellites) You say it's unreliable? @Mikal,
2. Do you mean $GPGGA sentence? The 7th value of the sting “Horizontal Dilution of Precision (HDOP)” (After fix quality and number of satellites)
You say it’s unreliable?

]]> By: Mikal http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25356 Mikal Tue, 31 Jan 2012 19:33:32 +0000 http://sundial.org/arduino/?page_id=3#comment-25356 @Van Taiariol, It's hard to imagine that being a software issue, but I can't say for sure. Is there any chance you could capture the NMEA stream when the speed is below 2 knots? @Van Taiariol,

It’s hard to imagine that being a software issue, but I can’t say for sure. Is there any chance you could capture the NMEA stream when the speed is below 2 knots?

]]> By: Mikal http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25355 Mikal Tue, 31 Jan 2012 19:31:36 +0000 http://sundial.org/arduino/?page_id=3#comment-25355 @UrSuS, I didn't answer directly because I don't know exactly, but I know of two strategies that people have used to increase accuracy: 1. Examine the "number of satellites seen" field on the theory that the more satellites seen, the greater the accuracy. Note that the current version of TinyGPS does not support number of satellites in view, but I expect that the next version will, and it's an easy patch. 2. On the theory that the initial fixes reported by a GPS are the least accurate (and I confirm this experimentally with my EM-406A), simply wait until you've seen, say, 10 different fixes. That said, I don't how to <em>prove</em> that the accuracy is within a given radius. @UrSuS,

I didn’t answer directly because I don’t know exactly, but I know of two strategies that people have used to increase accuracy:

1. Examine the “number of satellites seen” field on the theory that the more satellites seen, the greater the accuracy. Note that the current version of TinyGPS does not support number of satellites in view, but I expect that the next version will, and it’s an easy patch.
2. On the theory that the initial fixes reported by a GPS are the least accurate (and I confirm this experimentally with my EM-406A), simply wait until you’ve seen, say, 10 different fixes.

That said, I don’t how to prove that the accuracy is within a given radius.

]]> By: UrSuS http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25352 UrSuS Tue, 31 Jan 2012 18:53:11 +0000 http://sundial.org/arduino/?page_id=3#comment-25352 Could you please answer my question about position accuracy? Could you please answer my question about position accuracy?

]]> By: Moving Forward with Arduino – Chapter 19 – GPS part II « t r o n i x s t u f f http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25296 Moving Forward with Arduino – Chapter 19 – GPS part II « t r o n i x s t u f f Mon, 30 Jan 2012 23:57:04 +0000 http://sundial.org/arduino/?page_id=3#comment-25296 [...] forget the 10k ohm pull-down resistor). You will need to install NewSoftSerial library, TinyGPS library and the SdFat library if not already [...] [...] forget the 10k ohm pull-down resistor). You will need to install NewSoftSerial library, TinyGPS library and the SdFat library if not already [...]

]]> By: scompo http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25286 scompo Mon, 30 Jan 2012 20:50:58 +0000 http://sundial.org/arduino/?page_id=3#comment-25286 @Mikal You're welcome. Glad I've helped. @Mikal You’re welcome. Glad I’ve helped.

]]> By: Van Taiariol http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25236 Van Taiariol Mon, 30 Jan 2012 00:36:56 +0000 http://sundial.org/arduino/?page_id=3#comment-25236 Hi Mikal, TinyGPS, Great program!. Have one question. Using a Polstar PMB-688 (parallax purchase) I get 0.00 knt when actual is below 2Knts. Above 3 knts read out is OK. Don't know if this is a hardware issue (gps module) or software. Has anyone else experienced this?? Regards, Van Hi Mikal,

TinyGPS, Great program!. Have one question. Using a Polstar PMB-688
(parallax purchase) I get 0.00 knt when actual is below 2Knts. Above
3 knts read out is OK. Don’t know if this is a hardware issue (gps module)
or software. Has anyone else experienced this??

Regards,

Van

]]> By: Mikal http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25191 Mikal Sun, 29 Jan 2012 06:38:21 +0000 http://sundial.org/arduino/?page_id=3#comment-25191 @Joe, I think I would examine the stats in TinyGPS. Are you actually getting any data? @Joe, I think I would examine the stats in TinyGPS. Are you actually getting any data?

]]> By: Mikal http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25183 Mikal Sun, 29 Jan 2012 06:04:54 +0000 http://sundial.org/arduino/?page_id=3#comment-25183 @scompo, TinyGPS now works with Arduino 1.0. Thanks! M @scompo,

TinyGPS now works with Arduino 1.0. Thanks!

M

]]> By: Mikal http://arduiniana.org/libraries/tinygps/comment-page-3/#comment-25182 Mikal Sun, 29 Jan 2012 06:04:23 +0000 http://sundial.org/arduino/?page_id=3#comment-25182 @Matt, Thanks for the offer. Email is probably the best way... @Matt,

Thanks for the offer. Email is probably the best way…

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