How to add a Rangefinder and OPFLOW sensor to your INAV Quad (Matek 3901-LOX)
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- čas přidán 12. 04. 2024
- www.3dxr.co.uk/sensors-c5/lid...
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I've been experimenting with the same Opflow units for almost three years now with mixed success. Those PID settings you showed in the document at the end of the video don't make much difference to performance in my case. I'm using INAV 7.1 and the default PIDs seem to work as well as the pictured ones. Best performance seems to be over surfaces like ceramic tiles with lots of small features for the camera to see. Worst of the lot is plain carpet. When my fluffy back lawn is short I get reliable terrain following and position hold from 100 to around 500mm. A fair bit of bobbing happens at 700mm altitude. Concrete with moss and lichens gives similar results. If anybody is looking to nail their quad in the sky like a DJI MAvic this is not the way to go but fun to try and it will keep you busy. I discovered the global population of Opflow experimenters is a small pool and a knowledge of Hindi and Korean will help. Cheers and have fun.
Performance of the OPFLOW depends on so many things. Not least being over the right kind of surface in good light.. Thanks for the comment. Happy flying!
You'd probably be better with Arducopter it handles position hold in general much better and tends to do better with the more obscure things like this.
I'm in that same boat right now with a MicoAir MTF-01, it works to a fashion, but its far from DJI-like even after hours of tuning and experimentation.
Thanks a bunch for the tutorial, Lee! 😃
I'm definitely going to try it!
Stay safe there with your family! 🖖😊
I'd say if you want good stabilisation px4flow is the only option. I wasted a lot of time with Matek OF, but the result was never been good.
Check out MicoAir MTF-01, its lidar rangefinder has in comparison to ST VL53L0X in Matek, up to 8 m range. Also I have no initialization issues with MTF-01, when it is very near to ground during power-up. I have one fitted in my SpeedyBee Master 5 V2 frame in the area where O3 unit aluminum heat sink is originally meant to go. It fits perfectly there. On top of the MTF-01 I have Walksnail Avatar VTX V2 unit. Did a custom mount out of TPU and PETG to attach both there.
nice excellent thank you!!
Very usefull,thanx🤠👍🇿🇦
Can you use position hold indoors, only using a Matek 3901-LOX and magnetometer without a GPS? I don't mean dead reckoning, just without any GPS?
Awesome neato! Can this hardware work under the arducopter system or is it inav only?
There are better performing sensors for Ardupilot. See the links in the description... Happy flying
Thanks for this!! I see you have the power lead coming right out the back next to the antennas. Do you think this could affect the VTX output reception for long range?
The power to the module is very low compared to VTX signals so I doubt if it would interfere.
@@Terry_Fritz I guess I should have been more clear I was talking about the power lead for the battery not for the optical flow
No issues here. Happy flying!
Hi ! thanks for the video :)
Is there a way to use both LIDAR/OPFLOW with GPS /w Mag at the same time ?
Maybe to force using LIDAR from the ground to 3m high, then GPS for higher altitudes ?
I'm using MTF-01 btw.
thanks !
That is kinda how it works... :D
Just about to do zohd altus build and was thinking about having one of these. Can you havve them switch on/off via a switch?
I wouldn't use this sensor board. See my fixed wing Rangefinder video... Happy flying
Lmao I literally got mine today and plan to install it tonight, thanks for the video!
How did it work out for you?
Hey, a bit of topic, but what would you say would be the biggest factor when choosing between inav and betaflight for my quad?
m.czcams.com/video/Y12tAXnGptY/video.html may help... Happy flying
What value should we expect for the optical flow calibration?
Whick value specifically?
Can it be used with arducopter on pixhawk 6?
I wouldn't, this isn't a great quaility piece of kit. See my video on the Benewake rangefinder, it is a lot more useful for flying a lower levels.
I've never been able to get 2 meters effectively with those units (had three of them). Above 80cm always went crazy showing random numbers. My idea was to make my CineLog35 stable indoor. But the limitation of ~1 meter was really disappointing(
Yeah, Rangefinder sensors like the Benewake TF units are far superior... Happy flying
I have mtf-01 optical flow and lidar sensor, can i soldering it in i2c pad (sda/scl)
I've not used that one. Best of luck
Does it require some specific mode like SURFACE or something else? Or does it work by default when you are under max_surface_altitude?
It's always supplying height data... Happy flying
@@Painless360 Yes correct, but in which mode or modifier (like SURFACE) INAV uses that data from rangefinder and optical flow. Is it enough to switch the drone into postion+alt hold mode? If rangefinder data is present for the flight controller will it use it automatically as more precision values? The same question regarding data from optical flow. INAV uses it as more precise data and ignores the accelerometer when opt flow data is present by sensors? Thanks for your answers!
That's my understanding.... Happy flying
what is the purpose of the sensor again? Is it used for autonomous flights?
Help it maintain position in a hover and land automatically more precisely.. Happy flying
how about the modes? pos&hold, nav altitude, heading hold and surface in one switch?
Add SURFACE mode to the flight mode when you want to use the Rangefinder... Happy flying
@@Painless360 yeah when I add SURFACE mode my drone up and down
do you have an idea what happen to my drone?
Not without looking at the logs and your setup... If you find the cause, please share....
Why Inav versus ardu pilot?
Can you elaborate? I don't understand the question...
@@Painless360 just curious why using Inav instead of ardupilot?
Ah I see. INAV is faster to setup and closer to Betaflight (that this quad was running before). I have a recent full series on Arducopter on the channel too so it was time to revisit INAV.. Happy flying!
It's like he knows what my next project is! 🥹