Edrae
25 posts
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Hello, When I let my GPS static, his accuracy is good, it retreives the position. But when I’m moving, It stops retreiving position or give me always the same position. It’s appears when I’m walking as well as driving a car. Speed dosen’t seems to be the problem. I tries many ways, for exemple parsing NMEA datas directly from RawFeed but it doesn’t improved anything. Did someone get a return on his BugLocate accuracy and updating position ? Is it an antenna problem (with passive antenna, accuracy is worst but it seems to be normal) or a module problem ? Thanks, Edrae.
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bcruskie
45 posts
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Hi Edrae, Sorry you are having issues. We’ve made some post-R1.4.3 udpates to the GPS stack. Here are the instructions to upgrade (thanks to jconnolly) We’ve rewritten a significant portion of the GPS stack to use a more widely adopted open-source JSR179 API. The changes should be transparent at the App level, but you should note a significant increase in reliability at the API level. This won’t impact the Time-to-first-lock problems, but hopefully will address the other GPS woes you’ve had.
Instructions:
1. Boot BUG with connection to internet (ethernet, wifi)
2. Get to command line (ssh or serial)
3. wget http://repo.buglabs.net/ipkg-extras.conf -O /etc/ipkg/ipkg-extras.conf
4. ipkg update
5. ipkg install http://repo.buglabs.net/all-extras/com.buglabs….
6. ipkg install http://repo.buglabs.net/all-extras/com.buglabs….
7. ipkg install http://repo.buglabs.net/all-extras/com.buglabs….
8. Reboot. Please let us know if you still have issues. Thanks, Brian
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Edrae
25 posts
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Hi Brian,
I saw something about this update but because I’m resistant to configuration stuff, I didn’t go ahead. I also didn’t think that driver update could fix my problems, I believed it was the api that goes wrong. I thanks you and JConnolly to bring me commands to enter words by words.
So, I didn’t have the time to make a full test but for now, improvement is great. This is what I did and the results :
Get a fix from my window and make a circle in my narrow garden => position is not fully correct and precise under the 3m but put some zigzag in about 30m (my garden is about 5 by 10 m, all of this with a realy big “about”). So it is better without being perfect.
Then, I go to my car, made a trip around a block and go back to my starting place => just excellent results !!! The position is almost perfect, When in my car, I can say it is was I’m waiting for.
I will make further tests while walking but I’m ease that it is not a hardware problem.
A last word, as you probably seen with my poor english, I’m not a native english speaker, could you explain me with first age words what did you mean with “time-to-first-lock” ? Is-it when I said that the position remains the same even when moving ? If it’s that, those to first tests are conclusive. Of course, I will continue and update this thread, especially if it goes wrong again.
Edrae.
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bcruskie
45 posts
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“could you explain me with first age words what did you mean with “time-to-first-lock” ?” Hi again Edrae, It is the duration of time it takes for the GPS receiver to get a postion from Satellites. Thank you for taking the time to post here. This will be useful to other users. We are a small company and we need to work on communicating these changes better. -Brian
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Edrae
25 posts
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Thanks for explanation. I never had problems to get a fix. Sometimes, but peharps it will not happend again with the update, led blinks green but datas continue to be sent as if it were not. In these case, restart concierge resolve the issue. Hope this will help others. I do not know why one of my sentence is strikethrough, considere it as not strikethrough. Edrae.
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Edrae
25 posts
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That’s the news : after some tests, I can say that all is clean ! Sometime a little confusing for a minute when switch it on and staying at the same place. Sometime its accuracy goes bad for a minute. But, as I chat with a friend of me who got a good walking GPS from Garmin, it’s all the same. It’s just that those walking GPS are smarter and got algorithms to handle momentary falling accuracy. It’s like car GPS that knows you’re not into the building with your car but just next on the same street as second before. Now it’s to us to implement this smartness. Defect is close. Edrae.
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Edrae
25 posts
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I had to reconfigure from scratch my Bug today (global updating seems to mess up system) and so upgrade GPS driver again. Please note that URL change for welcome Bug 2. So correct command lines are now : 1. Boot BUG with connection to internet (ethernet, wifi)
2. Get to command line (ssh or serial)
3. wget http://repo.buglabs.net/legacy/ipkg-extras.conf -O /etc/ipkg/ipkg-extras.conf
4. ipkg update
5. ipkg install http://repo.buglabs.net/legacy/all-extras/com.buglabs.common_1.0+svnr10892-r14_all.ipk
6. ipkg install http://repo.buglabs.net/legacy/all-extras/com.buglabs.bug.module.gps_1.0+svnr10928-r11_all.ipk
7. ipkg install http://repo.buglabs.net/legacy/all-extras/com.buglabs.nmea_1.0+svnr10889-r4_all.ipk
8. Reboot.
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bcruskie
45 posts
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Nice catch and thanks for the updating this thread!
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