DIY flight recorder using any (NMEA) GPS - #1 Hardware

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pki79 » 19 Jan 2014, 18:33

Hi, maybe it helps someone later.

The freeflight app told me today it failed to update the GPS firmware. After this the GPS was not availible, i had to disconnect and connect it again. The setting to update GPS was set to OFF so i don't know why the app tried it.

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by RemcoZ » 19 Jan 2014, 18:46

The app tried it because parrot released firmware p2 ( this is p1) the way I fixed is was by changing the description in the sketch to p2

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pki79 » 19 Jan 2014, 18:53

Wasn't it 4.2.1 or 4.1.2?

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pawelsky » 19 Jan 2014, 21:11

pki79 wrote:Wasn't it 4.2.1 or 4.1.2?
The initial FW was GSD4d_4.1.0-P1 12/20/2010 354, the upgraded one is GSD4e_4.1.2-P6 F+ 08/14/2013 226

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by RemcoZ » 19 Jan 2014, 21:13

Do you know what they changed?

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pawelsky » 19 Jan 2014, 21:30

RemcoZ wrote:Do you know what they changed?
There are many changes between these firmwares, my guess is that they did it due to updates in the Enhanced Ephemeris handling.

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pki79 » 19 Jan 2014, 21:32

If i connect a sirv IV chip it will upload the firmware? Or is the firmware for something between CP2102 and GPS?

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pawelsky » 19 Jan 2014, 21:37

pki79 wrote:If i connect a sirv IV chip it will upload the firmware? Or is the firmware for something between CP2102 and GPS?
If it is a flash based module and is compatible with the FW then probably yes.

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by RemcoZ » 21 Jan 2014, 19:22

got the new pro mini working. didn't had a DTR connection so getting the timing right for uploading the scetch was a pain but it worked eventually. It's raining like constantly but the first time I tried i got a lock of about 8 sats in like 2 or 3 mins so that was ok. total weight is about 15grams so I'm happy. I'll upload some pics later on thanks for the assistance pawelsky and pki79

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by RemcoZ » 23 Jan 2014, 11:26

I just came across this gps/arduino platform... might be interesting! http://www.indiegogo.com/projects/navsp ... s-receiver build in GPS/Beidou/ GLONASS receiver and 10Hz update rate what do you guys think, worth a shot?

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pawelsky » 23 Jan 2014, 11:28

RemcoZ wrote:I just came across this gps/arduino platform... might be interesting! http://www.indiegogo.com/projects/navsp ... s-receiver build in GPS/Beidou/ GLONASS receiver and 10Hz update rate what do you guys think, worth a shot?
For what purpose?

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by RemcoZ » 23 Jan 2014, 11:30

This? the ar drone? as it's the pro mini and gps in one with the additional GLONASS support.

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pawelsky » 23 Jan 2014, 11:34

RemcoZ wrote:This? the ar drone? as it's the pro mini and gps in one with the additional GLONASS support.
There are many GLONASS capable GPSes available in the market. As to the Arduino compatibility it is not clear how much processing power is left in the chip for anything else than the GPS data processing.

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by RemcoZ » 23 Jan 2014, 11:40

pawelsky wrote:
RemcoZ wrote:This? the ar drone? as it's the pro mini and gps in one with the additional GLONASS support.
There are many GLONASS capable GPSes available in the market. As to the Arduino compatibility it is not clear how much processing power is left in the chip for anything else than the GPS data processing.
it was just a suggestion... the prices are good if you ask me as 22$ for a gps receiver with those specs in combination with a arduino development board is not very much...But I understand your point! according to the skytraq website http://www.skytraq.com.tw/news/news2013Dec23.html
SkyTraq’s 7mm x 7mm QFN56 Venus822 quad-mode GPS/GNSS processor with extended I/O pins is used on NavSpark. Venus822 is designed to simultaneously process 34 GPS / GLONASS / Beidou / Galileo / QZSS / SBAS signals in parallel, thus having much higher computation power and larger memory than conventional 8bit or 32bit microcontrollers. Without using GPS/GNSS function, all the 100MIPS RISC/FPU processing power and 1MByte Flash + 212Kbyte RAM memory capacity is available for user application. When just using GPS-only mode or GPS/GLONASS, GPS/Beidou dual-satellite navigation mode, the remaining MIPS and memory still far exceeds what’s available on similar small, low-cost development boards on the market.
But judging from your reaction it's not good enough?

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Re: DIY flight recorder using any (NMEA) GPS - #1 Hardware

Post by pawelsky » 23 Jan 2014, 11:47

RemcoZ wrote:
SkyTraq’s 7mm x 7mm QFN56 Venus822 quad-mode GPS/GNSS processor with extended I/O pins is used on NavSpark. Venus822 is designed to simultaneously process 34 GPS / GLONASS / Beidou / Galileo / QZSS / SBAS signals in parallel, thus having much higher computation power and larger memory than conventional 8bit or 32bit microcontrollers. Without using GPS/GNSS function, all the 100MIPS RISC/FPU processing power and 1MByte Flash + 212Kbyte RAM memory capacity is available for user application. When just using GPS-only mode or GPS/GLONASS, GPS/Beidou dual-satellite navigation mode, the remaining MIPS and memory still far exceeds what’s available on similar small, low-cost development boards on the market.
But judging from your reaction it's not good enough?
Nowhere they mention how much of that power is used for the GPS itself. "the remaining MIPS and memory still far exceeds what’s available on similar small, low-cost development boards on the market" is a bit blurry statement so I would prefer to not comment on that until they show some real examples.

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