Post by: startrek66 on August 09, 2016, 04:08:01 pm
Thanks in advance
Post by: f5soh on August 09, 2016, 04:24:13 pm
http://www.banggood.com/Ublox-M8N-GPS-Compatible-with-DJI-NAZA-Lite-V1-V2-Flight-Controller-Phantom-1-2-Vision-p-991718.html
That allow GPS and also receive external Mag data using the same serial connection.
Naza GPS is currently supported using the Next branch, 15.09 release only support external mag from original OP GPSv9.
Post by: Mateusz on August 09, 2016, 04:43:30 pm
It is important to consider what GPS will be used for and why it is needed. I am perfectly happy without GPS for the type of flying I am doing right now. Altitude vario and it hovers more or less in place, I can let sticks for few seconds that is enough to put goggles on and tighten the head strap before it starts drifting.
- If the GPS is needed to have stricter hold in position, despite wind blowing, or position roam function, or GPS assist for stable filming then yes, you want GPS and that's the way to go I guess.
- On another hand, many people who actually ask about GPS, don't know it's much more complex to set up stuff, and it will NOT help or magically solve other problems they have. If the copter is not stable or flying great, adding GPS will not make things better. In those cases I would recommend fixing your build or tune instead of jumping directly into much more complex topic. Copter must fly be flying great in the first place to consider using GPS utilizing flight modes.
Something to think of :)
Post by: startrek66 on August 09, 2016, 06:16:40 pm
I agree that the GPS does not solve the stability problems . Luckily for me my quadcopter is really stable with flight mode that I use usually ( attitude , altitude hold) . The gps interests me to take pictures .
With reference to naza gps clone I noticed that only has a cable while I saw other GPS models with two cables that connect to the Main and Flexi ports . What are the differences ? Thanks
Example gps one cable
http://m.aliexpress.com/item/32630075400.html?productId=32630075400&productSubject=UBLOX-NEO-7M-NEO-7M-GPS-w-Compass-Stand-Holder-For-CC3D-Evo-CC3D-Revolution-Flight&spm=2114.46010408.3.67.sIkj1n&tracelog=wwwdetail2mobilesitedetail
GPS with two cables
http://m.aliexpress.com/item/32703991313.html?productId=32703991313&productSubject=U-blox-NEO-7N-GPS-with-3-Axis-Electronic-Compass-for-CC3D-Revolution-Flight-Controller&spm=2114.46010408.3.19.WjLEBX&tracelog=wwwdetail2mobilesitedetail
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Post by: f5soh on August 09, 2016, 07:20:59 pm
Quote
That allow GPS and also receive external Mag data using the same serial connection.
Others GPS with 2 cables uses one serial cable for GPS and another I2C connection for Mag.
So with one cable that more simple, avoid I2C issues and flexiPort/mainport is free for RC Input use like DSM/Sbus
Post by: hwh on August 09, 2016, 08:42:55 pm
« Last Edit: Today at 01:26:31 pm by startrek66 »It's usually a bad idea to edit a post after it's been answered. It would have been better to put the links in a new post. f5soh will never see that you changed your post and others may ignore it because it was answered by f5soh in it's original form.
« Reply #4 on: Today at 01:20:59 pm »
You can certainly buy a cheap GPS without a mag sensor like your first link and try to use the revo's built in mag sensor but that almost never works right. You might get lucky and find that it has the sensor but no cable and be able to add a cable but even then you still have all the disadvantages of an I2C external mag.
Your second link has the connector for an I2C mag and should work fine. I don't recommend buying them for two reasons: First, they take up both the main and flexi ports which limits your options for receivers, OSDs, etc... Secondly, the I2C ones are often hard to get running reliably.
Following the advice you were given to get a DJI/Naza style GPS is the easiest, most reliable way to add a GPS.
Post by: TheOtherCliff on August 09, 2016, 08:55:26 pm
Some GPSs have both a GPS and a mag. Get one that has both. This "aux mag" can be placed on a pole to get it farther away from the mag fields of the high current motor ESC battery wires. That allows it to see the Earth's mag field without so much distortion. You still need to twist all high current (battery, PDB, ESC, motor) wire pairs/triplets.
Some GPSs that have a mag, only have one cable. Both GPS and mag signal are sent on the one cable. That is what you should get because it does not need 2 ports on your Revo. You will want those Revo ports for other things, like OSD, Sbus, etc.
Some of the GPSs that have only 1 cable do not even have a mag. Stay away from those.
Generally, all of the GPSs that have two cables have a GPS and mag. These can be used if you already have this type of GPS. I have one and used to fly it a lot, but they use a different mag signal that is easier to corrupt if the cable is too long, etc.
If I recommend what I think is best right now, it is an authentic DJI GPS/mag. They are about $70 (shipped, new) on eBay.
Edit: They seem to be cheaper now, down to $43 shipped, new. I have not bought this, so buyer beware.
http://www.ebay.com/itm/DJI-GPS-Compass-Module-for-DJI-NAZA-M-Lite-Flight-Control-System-/251862698572
Next in line, I would get a DJI GPS/mag clone from eBay for about $22 (shipped, new) if you want cheap, but test it for several days as discussed here:
https://forum.librepilot.org/index.php?topic=449.msg15319#msg15319
In last place, but it still works is a simple uBlox GPS with an I2C aux mag (two cables).
Post by: startrek66 on August 10, 2016, 12:06:20 am
« Last Edit: Today at 01:26:31 pm by startrek66 »It's usually a bad idea to edit a post after it's been answered. It would have been better to put the links in a new post. f5soh will never see that you changed your post and others may ignore it because it was answered by f5soh in it's original form.
« Reply #4 on: Today at 01:20:59 pm »
You can certainly buy a cheap GPS without a mag sensor like your first link and try to use the revo's built in mag sensor but that almost never works right. You might get lucky and find that it has the sensor but no cable and be able to add a cable but even then you still have all the disadvantages of an I2C external mag.
Your second link has the connector for an I2C mag and should work fine. I don't recommend buying them for two reasons: First, they take up both the main and flexi ports which limits your options for receivers, OSDs, etc... Secondly, the I2C ones are often hard to get running reliably.
Following the advice you were given to get a DJI/Naza style GPS is the easiest, most reliable way to add a GPS.
Of course you're right. I was changing my message while f5soh answered .
Post by: startrek66 on August 10, 2016, 12:15:25 am
So what can you say about these products ?
https://www.youtube.com/watch?v=kFY9LyihBqo&index=5&list=PLYsWjANuAm4o3s930kAW0uCTapF3bo7eE
From the video it seems easy to configure and use.
Post by: hwh on August 10, 2016, 01:10:18 am
The video shows buying a GPS, buying an FTDI adapter, downloading UCENTER, configuring the GPS for a cc3d instead of a revo, and then finally connecting it to the revo where it will erase the settings you just did and configure the GPS the way it needs it. In fact, with the tiny "OP GPS" the video shows it doesn't remember any of the settings you do in UCENTER after a couple of hours without power applied anyway. It has no flash to remember settings or mag sensor. Those tiny GPS units also have a bad habit of melting as you can see from the attached pictures.
How is all that easier than buying the GPS we recommend and just connecting it to the revo?
Post by: Wagsy on August 10, 2016, 06:51:07 am
Buy GPS, cut wires, add to a REVO plug, set board to use INS13/GPS, calibrate-set to external mag and fly.
Post by: startrek66 on August 10, 2016, 08:54:05 am
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Post by: TheOtherCliff on August 10, 2016, 10:57:47 am
I will let you know if it is and if it passes my tests as well as my other authentic DJI GPS.
http://www.ebay.com/itm/DJI-GPS-Compass-Module-for-DJI-NAZA-M-Lite-Flight-Control-System-/251862698572
Post by: startrek66 on August 11, 2016, 05:15:54 pm
Thanks
http://m.banggood.com/Mini-Ublox-Neo-6M-GPS-For-CC3D-Revolution-Flight-Controller-wBuilt-in-Compass-p-1022655.html
http://m.banggood.com/Mini-Ublox-7M-GPS-Module-for-CC3D-Naze32-Flip32-SP-F3-Flight-Controller-p-1042849.html
http://m.banggood.com/Mini-Ublox-M8N-GPS-Module-NEO-M8N-GPS-for-APM-2_52_62_8-CC3D-SP-Racing-F3-Naze32-Flip32-PX4-p-1035454.html
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Post by: startrek66 on August 11, 2016, 05:16:56 pm
I just ordered one of these apparently authentic DJI GPS for $43 shipped. It looks exactly like my other authentic DJI, including all markings, screw placement, screw head type, etc. It seems to be the real thing that the seller has sold for $80 in the past (according to the item sales history).How you test the gps?
I will let you know if it is and if it passes my tests as well as my other authentic DJI GPS.
http://www.ebay.com/itm/DJI-GPS-Compass-Module-for-DJI-NAZA-M-Lite-Flight-Control-System-/251862698572
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Post by: f5soh on August 11, 2016, 05:48:02 pm
Found three models of gps. What is a good choice?
Thanks
All three are crap. No I2c wires, sometimes no mag chip inside and after added the i2c wires most of them are defective.
Why not just follow advice we give you and buy a Naza Gps, original or clone ?
Post by: startrek66 on August 11, 2016, 09:42:08 pm
http://m.banggood.com/Ublox-M8N-GPS-Compatible-with-DJI-NAZA-Lite-V1-V2-Flight-Controller-Phantom-1-2-Vision-p-991718.html
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Post by: f5soh on August 11, 2016, 09:45:26 pm
I posted the same link in my first post here.
Post by: startrek66 on August 11, 2016, 09:48:03 pm
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Post by: Wagsy on August 12, 2016, 12:07:36 am
Put the NAZA GPS up high out of the way, make sure that once you have a good cal, that it does not turn or move from that position or else your mag will be out again.
Mine is on a little foldaway stand, works really well, boots up fast and always arms, I'm impressed.
Post by: TheOtherCliff on August 13, 2016, 06:45:39 pm
I just ordered one of these apparently authentic DJI GPS for $43 shipped. It looks exactly like my other authentic DJI, including all markings, screw placement, screw head type, etc. It seems to be the real thing that the seller has sold for $80 in the past (according to the item sales history).How you test the gps?
I will let you know if it is and if it passes my tests as well as my other authentic DJI GPS.
http://www.ebay.com/itm/DJI-GPS-Compass-Module-for-DJI-NAZA-M-Lite-Flight-Control-System-/251862698572
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I wrote the DJI GPS part of the firmware and before that I wrote test programs that dump out all data and report all errors.
The easiest way you can test is to configure a flight controller to use it, plug these things into a permanent power supply (AC to DC maybe) and let it run without stopping for several days. If GPS and mag are still working after several days, they have passed the test. If not, you should find out how long it runs before breakdown (my cheap GPS breaks down about every 24 hours or so) and decide if it is worth the risk. I have Attitude mode on my flight mode switch so I can recover if GPS stops working.
Post by: startrek66 on August 14, 2016, 10:45:51 am
You supply tension from usb connection?I just ordered one of these apparently authentic DJI GPS for $43 shipped. It looks exactly like my other authentic DJI, including all markings, screw placement, screw head type, etc. It seems to be the real thing that the seller has sold for $80 in the past (according to the item sales history).How you test the gps?
I will let you know if it is and if it passes my tests as well as my other authentic DJI GPS.
http://www.ebay.com/itm/DJI-GPS-Compass-Module-for-DJI-NAZA-M-Lite-Flight-Control-System-/251862698572
Inviato dal mio SM-G800F utilizzando Tapatalk
I wrote the DJI GPS part of the firmware and before that I wrote test programs that dump out all data and report all errors.
The easiest way you can test is to configure a flight controller to use it, plug these things into a permanent power supply (AC to DC maybe) and let it run without stopping for several days. If GPS and mag are still working after several days, they have passed the test. If not, you should find out how long it runs before breakdown (my cheap GPS breaks down about every 24 hours or so) and decide if it is worth the risk. I have Attitude mode on my flight mode switch so I can recover if GPS stops working.
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Post by: f5soh on August 14, 2016, 03:18:06 pm
Usb only power board, not external devices connected to Receiver/Main/Flexi ports
Post by: startrek66 on August 17, 2016, 12:07:47 pm
GPS need external +5V to be powered.Thank you for reply.
Usb only power board, not external devices connected to Receiver/Main/Flexi ports
I followed your advice and ordered a naza gps clone but also a neo - 7n GPS ( really low price )
http://www.ebay.it/itm/252497567144
I change the connector with two jst-sh 4 pin.
To configure the GPS can use the 15.9 version of the gcs or I have to change version ?
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Post by: f5soh on August 17, 2016, 01:16:22 pm
Quote
Naza GPS is currently supported using the Next branch, 15.09 release only support external mag from original OP GPSv9.
Post by: startrek66 on August 17, 2016, 02:31:32 pm
I think you can found the answer in my first post in this thread:Thanks for the reply . I'm not expert in software programming so I think I'll wait a new final version of gcs .QuoteNaza GPS is currently supported using the Next branch, 15.09 release only support external mag from original OP GPSv9.
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Post by: f5soh on August 17, 2016, 02:42:59 pm
Post by: startrek66 on August 17, 2016, 02:50:23 pm
https://forum.librepilot.org/index.php?topic=1910.0In this community you are all very cooperative . Thanks again.
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Post by: TheOtherCliff on August 23, 2016, 09:36:44 pm
http://www.ebay.com/itm/251862698572
I received mine today. It's an authentic DJI Naza Lite. I haven't tested it yet.
You need "next" or the upcoming release to use it, and you must solder a different connector on it.
Post by: startrek66 on August 24, 2016, 08:41:07 pm
$43 (shipped) DJI/Naza Lite GPSGreat! Thanks
http://www.ebay.com/itm/251862698572
I received mine today. It's an authentic DJI Naza Lite. I haven't tested it yet.
You need "next" or the upcoming release to use it, and you must solder a different connector on it.
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Post by: startrek66 on September 14, 2016, 12:03:36 am
I would like confirmation if the compass is integrated in it .
There are the six wires GND, VCC, TXD, RXD, SCL, SDA.
I see a chip L8832036 signed , could be the compass ?
Regards
Post by: hwh on September 14, 2016, 01:41:44 am
The first 4 wires (gps and power) go to the main port and the last two (mag) go to the flexi port. The wiring is in the wiki at https://librepilot.atlassian.net/wiki/display/LPDOC/GPS+setup#GPSsetup-GPSwiring and your gps is the one on the left.
Post by: startrek66 on September 14, 2016, 11:11:14 pm
I suppose that flash memory chip is the missing chip U2 on the board near Neo 7M?
Post by: hwh on September 14, 2016, 11:15:25 pm
Post by: startrek66 on September 15, 2016, 08:10:31 am
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Post by: Mateusz on September 15, 2016, 11:19:29 am
For now I do not care to use it in flight , but how can I check if the GPS is working properly and receives the satellites?
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In GCS you can see number of satellites and whether it gets a stable 3D lock/fix. If you're losing 3D fix, then you need to wait till it finds more sats.
You might want to consider removing "Inviato dal mio SM-G800F utilizzando Tapatalk" from your forum software for the sake of sanity of other users ;)
Post by: startrek66 on September 15, 2016, 11:36:32 am
I remove
Post by: Mateusz on September 15, 2016, 11:46:57 am
I can use GCS 15.09? Connect only main port?
I remove
15.09 supports only one GPS+AuxMag unit which is OP Platinum GPSv9 (not produced anymore). It also supports Ublox protocol GPS units, but that's just GPS alone and not very useful if you indention is to use navigation.
16.09-RC1 supports external magnetometer so you can connect Ublox GPS and HMCxxxx mag, it also supports GPS+AuxMag (over I2C) and DJI GPS (unit also contains AuxMag and I recommend this one).
For 16.09-RC see https://forum.librepilot.org/index.php?topic=2266.0
To just test GPS unit alone, you can just connect main-port with 15.09 and it will show sats on Revo. Remember GPS and Mag are two different devices that both are needed for navigation, and it just happens some GPS units have Mag integrated.
Post by: startrek66 on September 21, 2016, 08:33:35 pm
I can connect the cable without perform a wizard?
Post by: hwh on September 21, 2016, 08:54:45 pm
Post by: startrek66 on September 21, 2016, 11:19:38 pm
Yes, just go to the config tab and set the settings for the port(s) you plug it into.Thanks.
It's just power the revo through the USB cable from the PC or do I connect the battery lipo?
Post by: hwh on September 22, 2016, 05:39:15 am
Post by: startrek66 on September 22, 2016, 08:10:28 am
Post by: startrek66 on September 23, 2016, 08:58:21 pm
USB powers only the flight controller itself, nothing plugged into it gets powered by USB. To power a GPS (or a receiver) you have to connect the battery.You know if revo board ports are protect by connection with devices with defects? I'll explain. A device with defects can damage the revo?
Post by: hwh on September 24, 2016, 01:27:54 am
That said, a bad GPS is unlikely to damage the revo. For the most part it would have to put more than 5 volts onto a revo pin and I've never seen a GPS module that had more than 5 volts on it.
Post by: startrek66 on September 24, 2016, 09:35:29 am
Post by: hwh on September 24, 2016, 05:12:02 pm
The actual sat locations aren't stored anywhere, their orbits are way below geosynchronous orbit (and in weird directions) so they're constantly moving anyway. Some GPS store the ephemeris (essentially a list of sats and orbital info for them) for a while using power from either a tiny battery or supercap on them. That makes getting a lock the second time during a day faster since the GPS doesn't have to download the ephemeris each time.
Post by: startrek66 on September 24, 2016, 07:15:46 pm
In fact, the GPS module is a small lithium battery. I read in the Ublox NEO-7M data sheet which is designed to receive both satellites the GPS network, but also the Russians glonass. This choice as it happens?
Post by: f5soh on September 24, 2016, 10:02:39 pm
Those settings can be adjusted using the GPSSettings uavo in UavoBrowser
Post by: troll on October 08, 2016, 09:19:15 am
I'm looking GPS for autonomous flying. After investigating I'd found this:
http://www.ebay.com/itm/Ublox-NEO-M8N-GPS-Compass-for-CC3D-Revolution-Revo-Nano-Flight-Control-BoardYYc-/222271612736?hash=item33c06ba740:g:oQcAAOSwmfhX4OLX
It seems to be with MAG inside also contain proper JST connector for Revo board.
Could you please recommend or not this module?
As I understand I should use 16.09 GCS, correct?
Post by: startrek66 on October 08, 2016, 10:04:41 am
Post by: hwh on October 08, 2016, 06:47:35 pm
...It seems to be with MAG inside also contain proper JST connector for Revo board.It would need two connectors to have a mag in it that's working. If it does have a mag chip inside you'd have to add another cable and connector to get the mag to work. And that would take up both the main and flexi ports.
Could you please recommend or not this module?
As I understand I should use 16.09 GCS, correct?
As startrek66 said, the only ones with one cable that combines the gps and mag are the clones (and original) DJI Naza GPS. That's the one most of us recommend. The old OP GPS v9 (Platinum) did too but it's not made anymore.