Very interesting stuff, especially the drift over time tracking at the end. I really think you should try the supplied u‑blox antenna unless you have found a serious detrimental effect on the magnetometer. In our testing the antenna magnet only had significant effect when closer than 3cm to the magno. But that needs to be confirmed on your setup. The drift over time and the position repeatability was "not so great" and I can only put it down to either software or bad multipath rejection with that 4$ antenna assuming the static reference gps module had a decent period to settle in survey mode.
You might be able to get more horizontal position precision by playing with nav_mc_pos_xy_p, nav_mc_pos_xy_i, nav_mc_pos_xy_d, nav_mc_vel_xy_p, nav_mc_vel_xy_i, and nav_mc_vel_xy_d. The position controller is feeding the input of the velocity controller. Did you try playing with them ?
M8N looks pretty close, especially for about $21. I guess I could figure out a way to compensate for its errors. 1 to 1.5 meters would be ok for the autonomous rover/mower I'm building. My lot is only 688 square meters in size. Again, great videos! I've learned a lot, thanks!
How far must a GSM antenna or WiFi antenna stay away from a speaker taken out from a resident telephone set? How two antennas (GSM n WIFI antenna) apart from each other? Should GSM antenna place horizontally?
The reason for inav overshooting the position hold on RTH is probably the pos hold pid parameters not being tuned enough. Try increasing the derivative and you should get rid of this behaviour.
I tried different settings. Anyway, accuracy even within a meter does not fit. From 10 flight times, it is still 2-3 times to return more than a meter from the take-off point. 1.5 meters; 1.2 meters. Does rtk work with such accuracy?
As I mentioned in my summary, flight control is not really a good use of RTK because there is too much outside influence (wind, compass accuracy etc). On top of this the flight controller is not programmed to be very fussy about precise positioning, it's main purpose is just to land near enough to the target. What you need for really great positioning is an environment where for example, if the vehicle decides to move 30cm, it really will move 30cm precisely. In other words, a ground vehicle with good friction contact to the ground and ideally some secondary method of measurement like rotary encoders on the wheels.
@@iforce2d Got it. Does it depend on a lot of external facts? Ie RTK is better, but not 100%. Centimeter accuracy, I can hardly get on a quadrocopter? About the settings. I read on the website pixhavk instructions on the RTC, on the site of the Drotek and watched your video. Settings differ a bit everywhere. What are the best settings to install. And how much accuracy depends on the settings. I changed to settings advanced from the site Drotek. And I did not notice the exact difference (
One question, how do you run a hex setup with an omnibus f3? I can't. M5+6 are shared with uart3, and I need all 3 uarts for telemetry, gps and receiver. Maybe softserial? But there are no pins left.
Yeah I ran into that problem too. I put my receiver onto UART2, and the gps onto UART1. For telemetry I will be using the OSD which runs on SPI so it doesn't steal any UARTs. The only pins remaining that look even remotely possible for softserial might be M7+8 but I think you'd need to compile your own build to get it to happen. In some ways my good old F1 flip32 was more convenient, it flies great on a very early iNav version and has no problem connecting all these peripherals. One of the common points claimed as an advantage of moving from F1 to F3 is that you get more UARTs, but if you don't actually get to use them in reality I have to wonder if it's actually a step forward.
Thank you, I can at least get it flying that way, and have RTH, but I wanted to use a 3dr radio and mission planner with it, probably not possible. I will have another try with Ardupilot on PXFMINI and RPI2, which brings up a whole bunch of other problems, linux hacking etc, but well, it would be boring without these challenges. Whish you all the best and looking forward to more videos from you. Mark
iforce2d Maby it das on inav i dont know i use apm myself and i allways unplug and plug back to be safe. It just looked like it returned back to the second position from that camera angle that's why I thought i mention it. Anyway I thought it was pretty good regardless.👌
I am just about to start a kit build using these components would it be OK to ask a newbie question. Do you have to do a calibration dance (turn it around 3 times) like you do with Phantoms and the like before each flight? Cheers!
Thanks for that! Just never see anyone do it with one of these and whilst I fly toy grade right now I have to do it every flight. Once again thanks and subbed. ;)
It's all in the docs bro :) github.com/iNavFlight/inav/wiki/Sensor-calibration ardupilot.org/copter/docs/common-compass-calibration-in-mission-planner.html
iforce2d, I am following your channel and I support your tutorials since 2 years, you do a great job with all these videos drones. You know, its helped me so much in my project of end of study. so thank you a lot friend.
What degree of accuracy would satify your ideas ? Maybe triangulating on mobile phone towers would more accurate. Do you have three towers in NZ yet mate ?
Probably... hasn't the majority of the 1% fled to there to setup defensible compounds to wait out the die off from climate change? Definitely high cash influx.
There's some pretty impressive wind-gust multi-rotor position holding coming outof TUDelft lately: ua-cam.com/video/VddwU5CabS8/v-deo.html I dunno... UAV goals i guess? Probably not open source i'm guessing. :T
Antreas Demetriou Its best $15 flight controller money can buy ;-) m.ebay.com/itm/OMNIBUS-F3-AIOV1-1-Flight-Controller-w-Integrated-OSD-Barometer-Support-SD-card/292164545995?hash=item44065d2dcb:g:uWEAAOSwcj5ZUdVR
Very extensive tests. Thank you so much for taking the time to share your findings.
Very interesting stuff, especially the drift over time tracking at the end. I really think you should try the supplied u‑blox antenna unless you have found a serious detrimental effect on the magnetometer. In our testing the antenna magnet only had significant effect when closer than 3cm to the magno. But that needs to be confirmed on your setup. The drift over time and the position repeatability was "not so great" and I can only put it down to either software or bad multipath rejection with that 4$ antenna assuming the static reference gps module had a decent period to settle in survey mode.
really looking fwd to the new waypoints offered in inav, without the need for an external app. and also a test video when it becomes available.
Wow !! This is a really great video and is a really good field test of the unit.
Thankyou it.
Can't wait to see the rover experiments ; )
mistercohaagen i am waiting for that too :-D
You might be able to get more horizontal position precision by playing with nav_mc_pos_xy_p, nav_mc_pos_xy_i, nav_mc_pos_xy_d, nav_mc_vel_xy_p, nav_mc_vel_xy_i, and nav_mc_vel_xy_d. The position controller is feeding the input of the velocity controller. Did you try playing with them ?
I have not seen one of those build in a long time. Nice😃
M8N looks pretty close, especially for about $21. I guess I could figure out a way to compensate for its errors. 1 to 1.5 meters would be ok for the autonomous rover/mower I'm building. My lot is only 688 square meters in size.
Again, great videos! I've learned a lot, thanks!
outstanding video
How far must a GSM antenna or WiFi antenna stay away from a speaker taken out from a resident telephone set? How two antennas (GSM n WIFI antenna) apart from each other? Should GSM antenna place horizontally?
The reason for inav overshooting the position hold on RTH is probably the pos hold pid parameters not being tuned enough. Try increasing the derivative and you should get rid of this behaviour.
Hi,
As I know you are using Hobbywing 4in1 ESCs with the BlHeli firmware. What motor timings are you using and was the Damped Light option turned on?
Please show how you setup gps with f3 flight controller.
With a quadcopter if you can.
I tried different settings. Anyway, accuracy even within a meter does not fit. From 10 flight times, it is still 2-3 times to return more than a meter from the take-off point. 1.5 meters; 1.2 meters. Does rtk work with such accuracy?
As I mentioned in my summary, flight control is not really a good use of RTK because there is too much outside influence (wind, compass accuracy etc). On top of this the flight controller is not programmed to be very fussy about precise positioning, it's main purpose is just to land near enough to the target. What you need for really great positioning is an environment where for example, if the vehicle decides to move 30cm, it really will move 30cm precisely. In other words, a ground vehicle with good friction contact to the ground and ideally some secondary method of measurement like rotary encoders on the wheels.
@@iforce2d Got it. Does it depend on a lot of external facts? Ie RTK is better, but not 100%. Centimeter accuracy, I can hardly get on a quadrocopter? About the settings. I read on the website pixhavk instructions on the RTC, on the site of the Drotek and watched your video. Settings differ a bit everywhere. What are the best settings to install. And how much accuracy depends on the settings. I changed to settings advanced from the site Drotek. And I did not notice the exact difference (
One question, how do you run a hex setup with an omnibus f3? I can't. M5+6 are shared with uart3, and I need all 3 uarts for telemetry, gps and receiver. Maybe softserial? But there are no pins left.
Yeah I ran into that problem too. I put my receiver onto UART2, and the gps onto UART1. For telemetry I will be using the OSD which runs on SPI so it doesn't steal any UARTs. The only pins remaining that look even remotely possible for softserial might be M7+8 but I think you'd need to compile your own build to get it to happen. In some ways my good old F1 flip32 was more convenient, it flies great on a very early iNav version and has no problem connecting all these peripherals. One of the common points claimed as an advantage of moving from F1 to F3 is that you get more UARTs, but if you don't actually get to use them in reality I have to wonder if it's actually a step forward.
Thank you, I can at least get it flying that way, and have RTH, but I wanted to use a 3dr radio and mission planner with it, probably not possible. I will have another try with Ardupilot on PXFMINI and RPI2, which brings up a whole bunch of other problems, linux hacking etc, but well, it would be boring without these challenges. Whish you all the best and looking forward to more videos from you. Mark
How much does this set-up cost without the drone
Just wandering if you reset the flight controller after it lands and you move it over the white spot so the error does not accumulate?
Last I checked it sets the home position when arming. Hope they haven't changed it :)
iforce2d Maby it das on inav i dont know i use apm myself and i allways unplug and plug back to be safe. It just looked like it returned back to the second position from that camera angle that's why I thought i mention it. Anyway I thought it was pretty good regardless.👌
I am just about to start a kit build using these components would it be OK to ask a newbie question.
Do you have to do a calibration dance (turn it around 3 times) like you do with Phantoms and the like before each flight? Cheers!
Yes, but it's not for the GPS, and you don't need to do it before every flight.
ua-cam.com/video/lEY-gmt6ijg/v-deo.html
Thanks for that! Just never see anyone do it with one of these and whilst I fly toy grade right now I have to do it every flight. Once again thanks and subbed. ;)
It's all in the docs bro :)
github.com/iNavFlight/inav/wiki/Sensor-calibration
ardupilot.org/copter/docs/common-compass-calibration-in-mission-planner.html
That's what I was looking for, RTH function using ublox GPS but it will be so great if it a board Arduino based quad, Thank u anyway.
multiwii can do that, better use a mega2560 though: ua-cam.com/video/21RlK_0YCQM/v-deo.html
iforce2d, I am following your channel and I support your tutorials since 2 years, you do a great job with all these videos drones. You know, its helped me so much in my project of end of study. so thank you a lot friend.
whats the best flight controller with gps combo at the moment?
note that electronic barometers are also sensitive to (sun)light...
Question: Do the base and the rover have to be in line of sight?
No. They are communicating via 900MHz radio link.
@@iforce2d nice. Thank you very much. I will use these modules for my diploma project
Was this a flight without a base station, a ground one?
The base station is just behind me, I looked at it a little in this video: ua-cam.com/video/n8PUyOtiGKo/v-deo.htmlm20s
what is the capacity,voltage and the discharge rating of your lipo battery
I think it was a Multistar 4S 8000mAh, 10C
Should the honey cup be full or empty?
Half full or half empty?:)
What flight controller board? How do you like inav? Is it reliable?
Omnibus F3.
What degree of accuracy would satify your ideas ?
Maybe triangulating on mobile phone towers would more accurate. Do you have three towers in NZ yet mate ?
Probably... hasn't the majority of the 1% fled to there to setup defensible compounds to wait out the die off from climate change? Definitely high cash influx.
👍👍👍
I thought it needed a base station?
correct
ua-cam.com/video/n8PUyOtiGKo/v-deo.htmlm16s
روع 😍😍😍😍😍
There's some pretty impressive wind-gust multi-rotor position holding coming outof TUDelft lately: ua-cam.com/video/VddwU5CabS8/v-deo.html
I dunno... UAV goals i guess? Probably not open source i'm guessing. :T
what is the flight cotroller
Please watch the at least first ten seconds of the video :)
iforce2d i watched i dont understand what you said about the version onimbus f3 what version i dont understand
ahahahha
Antreas Demetriou Its best $15 flight controller money can buy ;-) m.ebay.com/itm/OMNIBUS-F3-AIOV1-1-Flight-Controller-w-Integrated-OSD-Barometer-Support-SD-card/292164545995?hash=item44065d2dcb:g:uWEAAOSwcj5ZUdVR
darexg thank you for your reply
i'm desining a rtk drone while watching your video (c94 m8p) i have some question. so can i get your email adress?
i really need your help
Thanks for the review. In fact, probably is overkill for a uav, and very expensive... i'll stick with the m8n...
Im gonna rate it 3.69/4.35