The build is coming along.....sometimes I'm pulling my hair out trying to calibrate, but your videos are cutting what would be 345,678 hrs into a 39 hr job.....your my official favorite youtube channel yeah!!!!
You guys are the best, I'm completely new to this incredible hobby, literally got my first toy quad a month ago, and am planning a hexacopter and quadcopter build, I'm hooked!!! Can't wait to become completely autonomous. I'm planning on installing a spoon having my quad stir my hot chocolate on a cold evening in high wind whilst filming it all with my gopro.....lol.
thx, guys. I'm just having dreams about FPV every night. Maybe that's the thing I should go for with my go pro. Happy new year to all of you from Belgium, Josh's and the team.
HK have a nice box to fit this APM model 2.5 and 2.6 which also fixes the problem with having to cover the sensor for the Barometer as the plastic is smoked colored limiting the problem with sensor .Great Vids Guys,very entertaining as well as some great information on multi rotor autonomouse setups. Keep it up and Fly safe Fly Lots cheers from jcinauz
1 second ago↵ Rodrigo Mincoff I think the most user friendly and the best osd and stabilisation sistem is the Hornet OSD + FY-31Ap. Because its plug and play. I would love if u guys could review it, maybe on the bixler. This review was one of the best. Congratulations keep on like this. And specially THANK YOU!!!!!
As Josh and Josh, and especially David Windestål have shown us, its about the electronics on board (and the pilot) that define a multirotor, and often it's the simple frames that work the best. Plus if it's a test platform, you want something that's easily fixed/replaced. Have a look at Flitetest's video on the H-Quad for some reasons why it's a great platform
On the latest version you can also put in waypoints via special x-bee equipment while it is flying. Also, you can put it on all types of rc aircraft or helps, just slightly different things.
because with the apm you can have auto takeoff, waypoint flight, and auto land. also, the apm can do fixed wing, helis, all sorts of multis, and even cars.
APM2.5 is excellent - particularly if you are a beginner FPV/multi-rotor pilot like me. Plus it gets itself and the GoPro home safely. Read the Geofencing stuff on the DIYDrones website for setting up a safe training environment in small urban flying sites.
There are a lot of videos on RUclips where somebody has flown a model behind an obstacle like a stone pillar, a building, etc. The model uses line-of-sight communication, so it loses contact and RTL kicks in. Problem is that it heads straight for the launch site - wihich is on the other side of the obstacle - so the model flies straight into the obstacle. It would be really nice if the flight controller could log the location of the model and its signal strength, say once per second, so that if signal is lost, it can re-trace its footsteps and avoid whatever has caused it to lose signal. In so doing, it would also revisit places where signal strength was good, and the model may be taken back into control.
I know this is 2 months later, but I have the APM 2.8 right now, and had that same concern, but I just increased the altitude for it to go to when RTL kicks in, and if you are above that set altitude it keeps that height. It's more just a matter of being smart when you have the failsafe on and are flying. I much prefer to have the RTL failsafe over it losing signal and dropping to 0 throttle.
yups. I just did a mission today with my arduplane, sending it 9km away to my parents home. I followed it with my car, tx turned off, telemetry on laptop on passenger seat. The plane had already landed in the field where it was supposed to land when I got there.
You guys make these shows fun and informationial with a little comedy thrown in. Just dont get to carried away with the jibing or it will get as stupid as some of the other "relality" shows. Thanks for your work and information.
The Hobbyking one is a counterfeit. The actual unit produced by Ardu-pilot is $180 Can or US, and has a $20 GPS upgrade. The one in this video I believe is the hobbyking version as it doesn't come with a case or Josh isn't using it. I don't know what the difference between the two boards are, just that the appearance of the board itself is noticeably different, compare the photos on the ardu-pilot official website to those on HK and you'll see what I mean.
Hi. I've a question which I hoppe can explain. I try to recover the informaction of the sensor al the output (Tx) of the telemetry port. But only some characters legible can visualize, In respect the rest of the info (the interesenting thing) I get only extrange characters, as a baud rate on serial port is out range . Can you explain how can I get that data? thanks...
I have one of these and a naza, both are amazing boards with gps control, The ardupilot way point feature gives it an advantage over the Naza, get the better GPS for the Ardupilot its a lot more reliable.
Some people like smooth flying, ability to configure everything and predictability. So many crazy NAZA fly aways and people getting hurt by their DJI suddenly coming to life when it was disarmed.
Yes I believe that is possible, a friend has one in a plane and he just throws it and i think once the accelerometer senses 15m/s or some preset value, it starts the motor and flies off into the blue yonder
Two very different products, if you want something to work out of the box Naza, APM is totally programmable, you can amend or write your own code. It needs tuning to work as well as Naza, but then you can reflash the APM into your planes as well, I have APM2.5 with OSD, I do really like the Naza tho
Some people use rate for adjusting gains. But I would like it more for the reason that I just don't like the way quads fly in auto level. It is nice to be able to flip to it to take a sip of water or adjust goggles, but I fly 95% in rate mode. Thank you for the reply :)
You will need to buy GPS for it which is 50$ so its 44+50 = 94. Software is MegaPirateNG that has same features as ArduPilot. You can add sonar too, anything.
APM is the best opensource project available for waypoint navigation at this time. Check out 3drobotics' website if you are looking to purchase. NAZA also has a good platform but it is closed source and a bit more expensive. OpenPilot will have an offering in the next few months called the Revolution but it is still in testing.
I am so happy to see this in a video. We followed the H-Quad and put on our APM and it works fantastically. You guys did a great job here as usual so keep up the good work. Just out of curiosity will you be doing any more on the APM? If they sent you a telemetry kit it would be great to see that shared because it takes it to a whole new level of cool. The mission planner also allows you to overlay the HUD on top of your fpv with a video capture card. Hope to see more and happy holidays
I wish I had RTH on my Quad last Saturday... I lost orientation in a moderate wind at maybe 1/2 mile distance and the last I saw of poor little Quaddie she was booking towards a wooded appalachian ridge... Since then the dawg and I have hiked miles through the dense woods, and while we have found 15 ticks between us, we haven't found Quaddie. Next build - a Hex with Ardupilot.
Naza is over $400 with GPS, has no ground station control and is closed source. A well-tuned ardupilot can ALmost compete with $1000+ FC systems as a UAV. Naza is only really a UAV when in RTH mode. AND the ardupilot will continue to get better.
Just the firmware. The board is the same. You can easily change between arduplane, arducopter or ardurover and put the same board in a plane, copter or car.
So the developers at 3DR have pretty much binned APM now in favour of PX4, which has now improved to Pixhawk. Do you guys have any of these RtOS flight controllers, and do you have any opinions about them? Too complex, annoying connector types, etc etc...
I think the APS system that align is putting in their new helicopters is just like this. I'm not sure how good the software is though. very cool stuff.
Are there some possibility for autopilot to determin the wind? If there is IAS sensor on the plane, can the AP make an information of wind, with data of IAS, current heading and ground speed from GPS. I am asking regarding the autonomous landing into the wind.
Hi. your videos are amazing. i have followed all the instructions correctly and everything is ok but my quadcopter is arming only when it is connected to computer with USB cable and lipo battery and it is not arming when not connected to the laptop. what might be the issue? I am using APM 2.5 with flysky remote controller and readytosky 920 kv motors with 1045 propellers and 3000 mAH battery. kindly help me please sir. Thank you sir
Ok, too cool, now I have to get one of these to put on my H-Quad (FliteTest build) since I just moved my Naza controller to a Hexa. Damn you fliteTest you enablers you, lol.
I have a question about the Pixhawk 2.1 Standard Autopilot, the Pixhawk 2.1 with intel Edison, the OPENPILOT CC3D REVOLUTION FLIGHT CONTROLLER, the ARDUPILOT MEGA (APM), and the PIXHAWK (PX4). Which one is the best, easiest to work with and best for the money? Can you do a show on the pros and cons of each one? Thanks Michael Cote'
u can buy the sensor board to plug into the top, then u just wire it up and upload a version of software. There's examples somewhere, I think the sensor board is pretty expensive, then you need gps. The complete boards are cheaper, if i remember
is there a way for me to figure out how big the engines and the props have to be in order for one of these to lift a DSLR or a GoPro ? (i will bui a 5000mAh battery)
So I have just recently purchased this board, calibrated everything but when I hit alt hold my quad it just jumps around. Could you please help me out, I highly doubt you won't reply. But if you do I would really appreciate it
you guys have the best videos! i have started to follow your camera guy knoptop hes is awesome truly makes magic for you guys. anyway back to the fc board i really want to see the newer and updated 2.7 sold at hobbyking. it is improved or supposed to be and it is all in one kit gps osd power module everything you need plus wires even. but does it work better and is everything fixed from the 2.5?
I am the not so proud owner of an CrazyPony APM 2.8 flight control board who cannot get my controller to communicate serially and I think I have tried it all; different windows 7,8,10 different computers. Uninstalls, reinstalls CP2x10 and zadag drivers to no avail. I did get it to the calibrate the compass once but since that episode nothing but fails or device not recognized even though it shows up in the device driver manager. what do I do next put it on display?
can you program in "no fly " zones ? where the computer over rides the transmitter . i know the gps is exact to 2 meters and wouldnt be advised indoors but just as an example. flying in a hall ... the walls and ceiling hight are boundaries or "no fly zones" ..
The Ardupilot is an amazing piece of equipment, though it does require some fiddling. The online forums can generally fix most problems, but if you're really stuck, please PM me and I can help you work it out. I hate to see someone dissatisfied with such a great control board.
Hey guys is this controler good for fixed wing ... I'm still new and just upgraded from a Trainer to EDF freewing F-15 ... And I want to upgrade the core.. so I can protect it
Could you do a tutorial of setting the APM 2.5 board up for a Vtail Quadcopter? Looking into building one this summer and just having trouble figuring out setting that up for a Vtail.
I am using F450 frame and APM 2.8 with external compass. I am not able to arm and always get message Check FS_THR_VALUE. Can you please help me to figure out what is wrong with my quad?
I have this chip with the NEO gps. Everything works, and ECS are synced. But in flight my "left front" motor is not compensating enough so the tricopter is moving in that direction. Even tho I am flying in stable mode.
![☀ Гоночный квадрокоптер на ардупилоте. Н - Надежность! [5 inch Arducopter Quad]](http://i.ytimg.com/vi/gSZQV3xvocY/mqdefault.jpg)
Glad it's helping! Don't forget the Arducopter - Quick setup guide on our website too.
The build is coming along.....sometimes I'm pulling my hair out trying to calibrate, but your videos are cutting what would be 345,678 hrs into a 39 hr job.....your my official favorite youtube channel yeah!!!!
That was a great video, very informative. I also like the fact that it blows apart the idea that you HAVE to have a dedicated frame for these things.
You guys are the best, I'm completely new to this incredible hobby, literally got my first toy quad a month ago, and am planning a hexacopter and quadcopter build, I'm hooked!!! Can't wait to become completely autonomous. I'm planning on installing a spoon having my quad stir my hot chocolate on a cold evening in high wind whilst filming it all with my gopro.....lol.
thx, guys. I'm just having dreams about FPV every night. Maybe that's the thing I should go for with my go pro. Happy new year to all of you from Belgium, Josh's and the team.
ardupilots 2.5 dont shave. you guys give the best reviews!
Awesome video covering the features of the ArduPilot 2.5. You guys just earned my subscribe.
I love the synergy between the Josh and Josh! Keep it up!
best demo of AP yet! Thanks for a great channel and site. As a newbie - you all have been a great source of information. now back to crashing my MQX!
LOVE that its not hobby k*** junk on here these days. Still one of my fav channels on youtube!
Can u guys pleaz make step-by-step tutorial on how to setup the APM 2.6?
Only the best show yet for a soon to be Ardupilot.
HK have a nice box to fit this APM model 2.5 and 2.6 which also fixes the problem with having to cover the sensor for the Barometer as the plastic is smoked colored limiting the problem with sensor .Great Vids Guys,very entertaining as well as some great information on multi rotor autonomouse setups.
Keep it up and
Fly safe Fly Lots
cheers from
jcinauz
Checked out your channel... Amazing voice!
1 second ago↵ Rodrigo Mincoff I think the most user friendly and the best osd and stabilisation sistem is the Hornet OSD + FY-31Ap. Because its plug and play. I would love if u guys could review it, maybe on the bixler. This review was one of the best. Congratulations keep on like this. And specially THANK YOU!!!!!
As Josh and Josh, and especially David Windestål have shown us, its about the electronics on board (and the pilot) that define a multirotor, and often it's the simple frames that work the best. Plus if it's a test platform, you want something that's easily fixed/replaced.
Have a look at Flitetest's video on the H-Quad for some reasons why it's a great platform
On the latest version you can also put in waypoints via special x-bee equipment while it is flying. Also, you can put it on all types of rc aircraft or helps, just slightly different things.
That's what I waited for! Thanks flitetest
It actually IS “Lord Willing”, as it is in absolutely every second of your life, every breath you take, and every molecule in your body.
you guys are so entertaining , instant like... what a great vid
because with the apm you can have auto takeoff, waypoint flight, and auto land. also, the apm can do fixed wing, helis, all sorts of multis, and even cars.
APM2.5 is excellent - particularly if you are a beginner FPV/multi-rotor pilot like me. Plus it gets itself and the GoPro home safely. Read the Geofencing stuff on the DIYDrones website for setting up a safe training environment in small urban flying sites.
Just got my APM 2.5, cant wait for it to come in so i can use it!!!
Josh n Josh are amusing. Who wants a dry fact on fact presentation ? Not moi.
Ardupilot is a full flight control board. All you need is the Rx, Ardupilot, ESCs and Motors. (and battery and props)
this APM 2.5 is totally way cool. it will bang out those commercial quadcopter that end up to almost MYR20k or much more!
Im getting that board ardupilot2.5 thanks Josh & Josh
I have an Ardupilot Mega 2.0 in my SkyClimber glider and it's great fun. I really like the 2.5 enclosure, though.
Spokane loves you guys! Thanks
There are a lot of videos on RUclips where somebody has flown a model behind an obstacle like a stone pillar, a building, etc. The model uses line-of-sight communication, so it loses contact and RTL kicks in. Problem is that it heads straight for the launch site - wihich is on the other side of the obstacle - so the model flies straight into the obstacle. It would be really nice if the flight controller could log the location of the model and its signal strength, say once per second, so that if signal is lost, it can re-trace its footsteps and avoid whatever has caused it to lose signal. In so doing, it would also revisit places where signal strength was good, and the model may be taken back into control.
+Mike Collins you can set it to climb to any altitude before returning so you can go above obstacles.
I know this is 2 months later, but I have the APM 2.8 right now, and had that same concern, but I just increased the altitude for it to go to when RTL kicks in, and if you are above that set altitude it keeps that height. It's more just a matter of being smart when you have the failsafe on and are flying. I much prefer to have the RTL failsafe over it losing signal and dropping to 0 throttle.
RCTimer has a clone for $110~$140 depending on your needs. There is a big thread over at rcgroups on it as well.
yups. I just did a mission today with my arduplane, sending it 9km away to my parents home. I followed it with my car, tx turned off, telemetry on laptop on passenger seat.
The plane had already landed in the field where it was supposed to land when I got there.
Cool! Bros. I love my Drone. Thanks for telling everyone how simple this project is. Now, how about a show showing just how much you can do with it.
I think the most user friendly and the best osd and stabilisation sistem is the Hornet OSD + FY-
You guys make these shows fun and informationial with a little comedy thrown in. Just dont get to carried away with the jibing or it will get as stupid as some of the other "relality" shows. Thanks for your work and information.
The Hobbyking one is a counterfeit. The actual unit produced by Ardu-pilot is $180 Can or US, and has a $20 GPS upgrade. The one in this video I believe is the hobbyking version as it doesn't come with a case or Josh isn't using it. I don't know what the difference between the two boards are, just that the appearance of the board itself is noticeably different, compare the photos on the ardu-pilot official website to those on HK and you'll see what I mean.
Hi. I've a question which I hoppe can explain. I try to recover the informaction of the sensor al the output (Tx) of the telemetry port. But only some characters legible can visualize, In respect the rest of the info (the interesenting thing) I get only extrange characters, as a baud rate on serial port is out range . Can you explain how can I get that data? thanks...
I have one of these and a naza, both are amazing boards with gps control, The ardupilot way point feature gives it an advantage over the Naza, get the better GPS for the Ardupilot its a lot more reliable.
Really impressed with this episode! Great work guys!
at RCtimer you can get them for $145, with telemetry modules, ublox gps and shipping included.
Great Video and Review! We are also selling APM2.5 here in the UK at our shop
It is different. You can easily add your own functions in firmware (like regular to Arduino). So it is flexible.
Some people like smooth flying, ability to configure everything and predictability. So many crazy NAZA fly aways and people getting hurt by their DJI suddenly coming to life when it was disarmed.
Yes I believe that is possible, a friend has one in a plane and he just throws it and i think once the accelerometer senses 15m/s or some preset value, it starts the motor and flies off into the blue yonder
Two very different products, if you want something to work out of the box Naza, APM is totally programmable, you can amend or write your own code. It needs tuning to work as well as Naza, but then you can reflash the APM into your planes as well, I have APM2.5 with OSD, I do really like the Naza tho
Some people use rate for adjusting gains. But I would like it more for the reason that I just don't like the way quads fly in auto level. It is nice to be able to flip to it to take a sip of water or adjust goggles, but I fly 95% in rate mode.
Thank you for the reply :)
You will need to buy GPS for it which is 50$ so its 44+50 = 94. Software is MegaPirateNG that has same features as ArduPilot.
You can add sonar too, anything.
For adjusting the PID's? yes, there is a lot of options for this. Auto tuning, adjusting with pot on the go. So many setting
I
There are OSD modules for this APM, this has the most functions but will take more effort to get working than Feiyu 31
APM is the best opensource project available for waypoint navigation at this time. Check out 3drobotics' website if you are looking to purchase. NAZA also has a good platform but it is closed source and a bit more expensive. OpenPilot will have an offering in the next few months called the Revolution but it is still in testing.
Adjust the TRIM on your remote and do an ACC calibration on your KK2.
LOL love Joshuas comments "it doesn't take two people to see if theres a blue light"
yes it does, set the battery to (10.2v (3 cell)) in the mission planner and it the fail safe to rtl,
I am so happy to see this in a video. We followed the H-Quad and put on our APM and it works fantastically. You guys did a great job here as usual so keep up the good work. Just out of curiosity will you be doing any more on the APM? If they sent you a telemetry kit it would be great to see that shared because it takes it to a whole new level of cool. The mission planner also allows you to overlay the HUD on top of your fpv with a video capture card. Hope to see more and happy holidays
Thanks for video. Very educational.
OMG WHAT I WAS WAITING FOR!
You can program a geofence polygon with many points that the APM2 will stay inside. Not sure if you can exclude areas inside the fence.
No, it will fly into them if its on its heading. You can change the heights it does everything though.
Loved this episode, great job guys
I wish I had RTH on my Quad last Saturday... I lost orientation in a moderate wind at maybe 1/2 mile distance and the last I saw of poor little Quaddie she was booking towards a wooded appalachian ridge... Since then the dawg and I have hiked miles through the dense woods, and while we have found 15 ticks between us, we haven't found Quaddie. Next build - a Hex with Ardupilot.
Naza is over $400 with GPS, has no ground station control and is closed source. A well-tuned ardupilot can ALmost compete with $1000+ FC systems as a UAV. Naza is only really a UAV when in RTH mode. AND the ardupilot will continue to get better.
Awesome, I've been waiting to see this reviewed. Do some more videos with it on a plane
Just the firmware. The board is the same. You can easily change between arduplane, arducopter or ardurover and put the same board in a plane, copter or car.
The 7:10 is the highlight for me lol Great review guys . . really helpful information here
So the developers at 3DR have pretty much binned APM now in favour of PX4, which has now improved to Pixhawk. Do you guys have any of these RtOS flight controllers, and do you have any opinions about them? Too complex, annoying connector types, etc etc...
I think the APS system that align is putting in their new helicopters is just like this. I'm not sure how good the software is though. very cool stuff.
Would you guys say you get MORE, EQUAL, or LESS flying time from your Tri-Blade props as compared to a 2 blade prop?
Iv got both the APM 2.5 and the HKPilotMega v2.5 and i cant see any difference in either, both fly great, easy to program .
Man, that used tampon was really funny!
Are there some possibility for autopilot to determin the wind? If there is IAS sensor on the plane, can the AP make an information of wind, with data of IAS, current heading and ground speed from GPS. I am asking regarding the autonomous landing into the wind.
Hi. your videos are amazing. i have followed all the instructions correctly and everything is ok but my quadcopter is arming only when it is connected to computer with USB cable and lipo battery and it is not arming when not connected to the laptop. what might be the issue? I am using APM 2.5 with flysky remote controller and readytosky 920 kv motors with 1045 propellers and 3000 mAH battery. kindly help me please sir.
Thank you sir
completly agree with you mrdude, way more capabilities with ardupilot, and: OPEN SOURCE = BEST
XD
Ok, too cool, now I have to get one of these to put on my H-Quad (FliteTest build) since I just moved my Naza controller to a Hexa. Damn you fliteTest you enablers you, lol.
I have a question about the Pixhawk 2.1 Standard Autopilot, the Pixhawk 2.1 with intel Edison, the OPENPILOT CC3D REVOLUTION FLIGHT CONTROLLER, the ARDUPILOT MEGA (APM), and the PIXHAWK (PX4). Which one is the best, easiest to work with and best for the money? Can you do a show on the pros and cons of each one? Thanks Michael Cote'
this looks really cool
u can buy the sensor board to plug into the top, then u just wire it up and upload a version of software.
There's examples somewhere, I think the sensor board is pretty expensive, then you need gps. The complete boards are cheaper, if i remember
I like to use an ear plug that has been cut in half to help turn down wind noise.
is there a way for me to figure out how big the engines and the props have to be in order for one of these to lift a DSLR or a GoPro ? (i will bui a 5000mAh battery)
So I have just recently purchased this board, calibrated everything but when I hit alt hold my quad it just jumps around. Could you please help me out, I highly doubt you won't reply. But if you do I would really appreciate it
I think they mentioned Navarre, OH. I've only been through there on my way to Canton or Cleveland.
you guys have the best videos! i have started to follow your camera guy knoptop hes is awesome truly makes magic for you guys. anyway back to the fc board i really want to see the newer and updated 2.7 sold at hobbyking. it is improved or supposed to be and it is all in one kit gps osd power module everything you need plus wires even. but does it work better and is everything fixed from the 2.5?
The arduplane, is a Plane with an ArduPilot built in.
I am the not so proud owner of an CrazyPony APM 2.8 flight control board who cannot get my controller to communicate serially and I think I have tried it all; different windows 7,8,10 different computers. Uninstalls, reinstalls CP2x10 and zadag drivers to no avail. I did get it to the calibrate the compass once but since that episode nothing but fails or device not recognized even though it shows up in the device driver manager. what do I do next put it on display?
will it work on gas powered planes and do the missions automatically???????
anyone knows where i can view and analyse the kalman filters as well as the kinematics/dinamic for it's PID used in this APM Flight Controller??
I really hope there is going to be a part 2 (and possibly 3 and maybe 4) to this video. You've hardly shown it doing anything a KK2 couldn't do.
can you program in "no fly " zones ? where the computer over rides the transmitter .
i know the gps is exact to 2 meters and wouldnt be advised indoors but just as an example.
flying in a hall ... the walls and ceiling hight are boundaries or "no fly zones" ..
The Ardupilot is an amazing piece of equipment, though it does require some fiddling. The online forums can generally fix most problems, but if you're really stuck, please PM me and I can help you work it out. I hate to see someone dissatisfied with such a great control board.
So, is this ArduPilot Mega 2.5 better than the Naze32? Is it readily available or do we do a waiting list?
I'm surprised they didn't mention "simple mode". Which means you don't need to worry about losing orientation.
Hey guys is this controler good for fixed wing ... I'm still new and just upgraded from a Trainer to EDF freewing F-15 ... And I want to upgrade the core.. so I can protect it
Could you do a tutorial of setting the APM 2.5 board up for a Vtail Quadcopter? Looking into building one this summer and just having trouble figuring out setting that up for a Vtail.
at $200 it is half the price of the NAZA M and comes with waypoints (NAZA does not) and a GUI for the computer.. WIN WIN
I am using F450 frame and APM 2.8 with external compass. I am not able to arm and always get message Check FS_THR_VALUE. Can you please help me to figure out what is wrong with my quad?
What FPV frequency do you use, and how come it doesn't interfere with the GPS module? Also, what GPS do you use?
Do a video on apm2.6
I have this chip with the NEO gps. Everything works, and ECS are synced. But in flight my "left front" motor is not compensating enough so the tricopter is moving in that direction. Even tho I am flying in stable mode.
hello! where can i find the schematic or datasheet of apm2.6 or 2.5?
thank you.
The APM2 board costs so much because it has really high quality sensors, especially the barometer for altitude. Other boards won't be as accurate.