[Whirlygig]

Hi all,

Can anyone who's bought/used one of these mini setups so far comment on the GPS performance?  Mostly position hold and RTL?

I've been using APM and am probably a bit spoiled with regards to autonomous functions.  I've become interested in seeing how small a quad I can build, and the mini seems perfect for this.  But I wonder as to how well that tiny little GPS receiver works, and of the general performance of GPS assisted modes in the firmware.

Thanks in advance.

[f5soh]

Hi, welcome

The key for a good setup is external mag, mandatory for a mini sized quad.
Small Gps do not have Mag but for 3$ a small I2c mag can be added.

Next release should allow additional support for i2c mag or Naza Gps/Mag.

Laurent

[Whirlygig]

Ok, thanks.  So assuming I use an external mag, those little GPS units would do a reasonably good job?  My main interest is just RTL and position hold, and even then I'm fine if they're just in the ballpark so to speak. 

If I'd need to use a larger GPS, then the attraction of the mini board is somewhat reduced and I'd probably just go for the full size Revolution w/telem radio integrated - gain some size in the FC, but eliminate the need to carry a separate radio makes it a wash.

And on that mini board (common on Banggood), it has two ports, main and flexi, so I assume those could be used for the GPS and a mag, once the firmware supports it? 

I'd love to see how small I could make a quad that still retains GPS functionality.

[f5soh]

Those small Gps uses a one chip neo7 like, small patch antenna and no LNA or filtering.
Current Next (dev branch) already support i2C mag.

Connect GPS to MainPort and I2C to flexi port, on Revo still one serial port on Flexi_IO (receiver port) for OSD use.

[Sator Codex]

Wrote a long post of my experience of this FC.
But forum in logg was timed out. All text lost.

But in short. I like this one. The board is of good manufacturing standard.
Ony thing I did mod. Was the foam that was compressed against the case and the baro.
I did cut it in half with a scalpel knife.

Have tested alt. hold a few times. Workes very well on my Tarot Robocat 250.
Even in quite windy conditions.

First flight was with generic 250 settings. But carful calibrations.
Flies well with minor adjustments to roll/pich/yaw rotations/deg.sec´s.
No adjustments to pID´s so far. No vibrations or other problems.

Adds a few pics of the unit with the case dissasembled.

Is there a plan to add this unit to the wiki manal?

[Sator Codex]

Ah. pics to large.
New downscaled ones here.

[f5soh]

Is there a plan to add this unit to the wiki manal?

No plans.
Sorry but we only describe original hardware in Wiki.

[Sator Codex]

Is there a plan to add this unit to the wiki manal?

No plans.
Sorry but we only describe original hardware in Wiki.

Ok, can understand that.
So the next qestion is..
Is there going to be any LP original hardware?

[f5soh]

Currently designing new hardware is very low priority.

Need something new ?

[Sator Codex]

Not really!

But new developments are always intresting.

[nitromethane]

Maybe the Revo could get updated to a newer MPU-9250 sensor?
(maybe I could also help with the hardware...)

[hwh]

Why do you want to replace the existing sensor with a MPU-9250?  What new capabilities will that give your new board  that the current revo doesn't have?

Those are the kind of questions that need to be answered before designing and supporting a new board.  What new capabilities does it have? How is it significantly better than the existing boards?

[f5soh]

No need to reinvent the wheel : Revo + MPU9250 + spare ports = Sparky2

[nitromethane]

Just saying...

[Sator Codex]

Oh!

Blackbox would be a nice addition!
The possibility to logg flights and sensors. Whith out the need of oplink.
Maby there already is a "revo" clone that has all funktions. ?
BLHeli or oneshot pass trgogh flashing would be nice to!