I have a problem, the error that I get when I put it in GUIDED mode is “Prearm: Need position estimate”, I read different solutions but I don’t have any answer since I have done everything those solutions say but without a good result, in the EKF it shows me this error, “pos_horiz_abs Off”, do you know how I can solve it?
2 posts - 2 participants
The planner is showing the input to the servo and the servo rail is powered because there is no response from the servo. Why is this happening?
5 posts - 2 participants
Hi everyone,
Our team is participating in a competition where we need to demonstrate the autonomous capabilities of our quadcopter.
The objective is to make the drone autonomous after receiving a command from a laptop. Once in autonomous mode, the UAV should perform a stable vertical takeoff at a constant velocity, ascend to a height of 3 meters, hover for 30 seconds, and then land at the exact takeoff position this should happen without gps.
For this, our team has purchased SimonK 30A ESCs, 1000KV BLDC motors, a Pixhawk 6X flight controller, a quadcopter frame, and a Raspberry Pi.
We are facing issues with uneven motor speeds, causing the UAV to crash. We have already disabled RC, GPS, and other unnecessary failsafe parameters, but we are still unable to get the drone to reach the desired height and hover for 30 seconds.
Any guidance or suggestions to resolve this issue would be greatly appreciated.
Thanks in advance!
9 posts - 3 participants
1 post - 1 participant
Hello, I wanted to ask if it’s realistically possible to achieve a higher battery charge rate from solar cells than the current load by using this 2400mm wingspan Volantex Phoenix 2400 glider frame?
Truthfully I don’t have any experience with RC planes, only drones, however I became really interested in building a solar plane which could fly for long periods of time. I read other posts achieving the same thing, and they have used higher wingspan frames (3m and more), wider wings (to fit more solar cells).
I hope I’m not asking the impossible, but are there other frame options which would suit my needs and preferably not cost a fortune? 
2 posts - 2 participants
Hello everyone
I have cuav pixhawk can i run ardusub on it?
Before this i try ardusub on omnibus f4 v2 this board can’t run ardusub and crashed
But i don’t know cuav pixhawk can handle ardusub or …
Thanks for your response
1 post - 1 participant
Waveshare LC29H is a low cost GNSS/RTK built on Raspberry PI. Has anyone used with their controller?
1 post - 1 participant
Before I go too far down the road with this idea for my next VTOL build, Can someone confirm if this is possible? Im thinking of tilting the entire canard with tip motors, either fixed together or independent for vectored yaw. Question- in forward flight can the same tilt servos now become ‘elevators’ or even elevons (if independent). Im quite sure this is possible if the layout was conventional but not sure the setting would work in this arrangement.
The pic is nicked off the net for example of the front wing layout. Probably I would use fixed rear ones, redundant in forward flight. I realize having an ‘all flying’ canard may have its own challange but Im just brainstorming at this stage.
1 post - 1 participant
I have I hope a quick question - I have tried to search prior queries, but haven’t seen anything that can help
I’m trying to arm my Holybro X500 which is bound to radio master Tx16s. When I try to arm, I get a message saying please switch to Manual mode - how do I do that ? Happy to go read a manual or some FAQ, but I haven’t found anything…appreciate any help !
-Matt
3 posts - 2 participants
I have a 3DR Radio Wireless Telemetry Kit and I can’t figure how to connect to it. It is not listed as a COM port but is instead listed under Other Devices as a CP2102 USB to UART Bridge Controller. How can I connect?
2 posts - 2 participants
In a post a few days ago I reported severe motor vibration when doing bench tests in Stabilize without props.
These were my AM32 settings:
The vibration went away when disabling the Complimentary PWM setting.
I learned today that the Complimentary PWM setting is used in conjunction with the Running Brake Level setting.
Essentially, if Complimentary PWM is disabled, then when throttle is reduced the motor freewheels. But if Complimentary PWM is enabled, braking is applied when the throttle is reduced. The amount of braking is determined by setting Running Brake Level.
The parameter settings in my test have the Running Brake Level at full - 10.
So I expect this needs to be set to a lower value.
And I’m also thinking that this may need to work in concert with ArduPilot tuning settings.
I don’t believe there are comperable settings for Complimentary PWM and Running Brake Level in BLHeli_32 or BLHeli_S. I don’t know about Kiss or others.
But it seems like something the DEVs might want to take a look at.
As an aside - according to the Ardupilot Parameter List wiki, there’s no “AM32” option for SERVO_DSHOT_ESC.
Here’s where I learned about these parameters:
1 post - 1 participant
Hi,
Main Question:
Is my list complete of radios that can do mavlink telemetry in a mesh network and is there any that standout as ones to choose/ ones to avoid? (I noticed that Xbee was listed as not recommended in the ardupilot documentation, but I do not know why)
915/868 MHz Frequency
RF Design 900x radios with mesh or asynchronous firmware
Holybro Microhard Telemetry Radio
XBee XR 900/868 or 900HP radios
Meshtastic radios?
2.4 Ghz
XBee 802.15.4 or DigiMesh radios
Meshtastic radios?
433Mhz
Meshtastic radios?
Not very certain on the meshtastic telemetry. From my beginner standpoint it seems all the requirements are there to do mavlink comms. And meshtastic seems like a hot topic right now. Someone please tell me if I am wrong!
Background information
I have been playing around with mesh networks for mavlink telemetry for swarms.
These are the options I have come across so far. I am thinking of having a primary and secondary swarm connection on my vehicles. I was thinking a god way to do that would be to have them on different frequencies right? like have one mesh network at 915MHz and another at 2.4 GHz? That seems the easiest route to avoid interference
I have come across the doodle lab mesh rider radios (but… that is very pricey, outside of my personal budget)
I also came across mLRS radios - but my understanding is that those are just point to point. Someone please correct me if I am wrong!
1 post - 1 participant
I downloaded NAssistant from Nooploop site, it starts ok but I cannot enable any features.
It is asking a code to enable features.
I want to change the bps in UART mode of the Nooploop TOFSense-F2 Lidar.
Any help or advice how to change the bps?
1 post - 1 participant
Hi,
As far as I understand, in 4.5.7 there is no possibility to work in lua with of.flowX and of.flowY. Is there such a possibility in 4.6 or 4.7?
1 post - 1 participant
The plane i assembly in Jan 2024 and last for one year,
but in February 2025 the plane crash due to slowly descend
the mission was set to fly in altitude 250 m, but in the middle of auto mode set before, the plane slowly descend its altitude.
I dont know it happen, i try to analyze the log, i decided to change to main motor,
and i try to reassembly after crash, but it continue with the same case
could anyone please help me to analyze this crash log?
thanks before
1 post - 1 participant
pixhawk2.4.8 auducoper都正常，安装auduRover4.5.7固件后，传感器都校准正常，总是报错unhealthy ahrs
可以解锁，解锁后立即上锁
1 post - 1 participant
Hello,
I’d like to ask if there is a recipe to smooth out the bank angle in continuous loiter of a bank-and-yank plane, i.e. no rudder.
I have the effect that obviously due to low yaw authority on low bank angle and very small yaw corrections on a loose radius, the plane starts to correct nervously while tracking the radius with good precision.
I’m circumventing this with a tight loiter radius for now but it would be nice to know if there is a recipe for this.
Thanks.
1 post - 1 participant
Hi all,
I need to take apart my old 35Mhz radio and switch to modern one to fly with both old style RC planes and do advanced experiments with Arduplane.
After some research, I’m oriented to buy something with the ExpressLRS system, with
I found interesting the following products:
My question is: Can I accomplish all the functionalities I wrote above with both?
Do you have any other advice for transmitters with similar features?
Thanks!
9 posts - 4 participants
大家好。
我用MK405飞控 ，内置SD卡记录BIN文件。
飞行完毕后我回家在电脑里面读取BIN文件，但是轨迹上面有尖角，不知道这是为什么，是哪里参数调整的不对吗？
我不是IT高手，我咨询过一些朋友，有人跟我说尖角处不是GPS信号丢失，是数据比较多。
请问大家有碰到过这样的情况吗？
Hello, everyone.
I use MK405 flight control, built-in SD card to record BIN files.
After the flight, I went home to read the BIN file in the computer, but there were sharp corners on the trajectory, I don’t know why this is, is there any wrong parameter adjustment?
I am not an IT expert, I consulted some friends, someone told me that the sharp corner is not GPS signal loss, is more data.
Have you ever encountered such a situation?
2 posts - 1 participant
Our project involves a VTOL in a tricopter configuration with two front tilting motors and using vectored yaw. We are using a CubeOrange flight controller with communications to the radio using ELRS. The ESCs we are using are Sequre SQESC 28120 (AM32) connected to XING 4214 2-8S X CLASS FPV Motor 660 KV.
Initially, all 3 ESCs showed a red indicator light, and the motors did not spin when using mission planner’s motor test function. However, after setting BRD_SAFETY_DEFLT = 0, one of the ESCs switched to a green light, whilst the other 2 ESCs are still showing a red light. The ESC with the green light started to spin up, but the ones showing the red light still do not.
We followed a comment that suggested to move the ESCs to AUX 1,2,3 to take advantage of the dshot capability of ARM32. However, that did not resolve any of our problems. We’ve tried a few ESCs that we had lying around and it’s weird because some of them work and some of them don’t when we attached it. As you can see in the video, we’ve found one extra ESC that made the motor spin up, so we have two working now.
The parameter file, a video of the ESC and motors beeping when powered up and armed, and the wiring diagram of our VTOL is attached. Thank you.
1 post - 1 participant
