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MAV_CMD_NAV_WAYPOINT doesn't make plane to fly to desired position

August 22, 2020, 10:10 am
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@AlexLmm wrote:

Hi!

I’m using MP simulation, and I’m trying to fly over a point on map by sending MAV_CMD_NAV_WAYPOINT command with coordinates (over ftdi).

But it never happens. Plane never flies over the point but turns just very much before it, and starts to fly circles.

How can I fly over the desired point? It’s really strange to loiter around the point in such way, because I need to be above the point first, and probably after crossing the point it would be logical to start loiter, but not before that.

Thanks!

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How to simulate sensors with MAVLINK through UART on PixHawk

August 22, 2020, 10:11 am
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@smilemaxdev wrote:

Dear all
I need you help in the following issue: I want to simulate sensors in Simulink for ArduPilot on Pixhawk. Show in the screen1.
And I successfully send MAVLINK-message HIL_STATE_QUATERNION (#115) . It is packed using my custom packer, show in screen2.
And I see this message in MissionPlaner/MAVLINK_INSPECTOR, show in the screen3.
But, values of sensors in MP don’t change, even when I change ComponentID to 1.
Can you help me please how I should send message to simulate sensors values?
Thanking you in advance.

screen1
screen11561×785 37 KB
screen2
screen21920×1040 76.2 KB
screen3
screen31920×1040 28.3 KB

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Run a script using servo activation as trigger

August 22, 2020, 12:32 pm
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@IcePanda wrote:

Hi! I’m an undergraduate student, new to Mission Planner.
I want to know if it’s possible to run a script (Lua or python) using a certain servo’s position as the trigger.
The particular problem I want to solve is saving or printing somewhere the altitude of the plane when the servo changes its position. This needs to be achieved at any point of the mission.

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Telemetry not working with a R9-MM-OTA

August 22, 2020, 12:46 pm
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@alan3113 wrote:

Hopefully someone can tell me what in doing wrong.I installed a R9MM-OTA on a copter but I can’t get any telemetry working…My radio is a Horus X10S running opentx, my R9M module is one of the original ones so I flashed the R9MM with the latest ACCST firmware. I bound the RX to the TX just like I would using an R9-RX and they always worked fine for me. I have an MLVSS voltage sensor connected to the S.Port of the RX but the TX isn’t able to find any sensors no RSSI or anything. I must be missing something really simple but I sure can’t find out what.

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Bug in Sik radio settings or user error?

August 22, 2020, 4:02 pm
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@VRquaeler wrote:

Hi,

After updating MP 1.3.70 to 1.3.73 I am really like the performance improvements and the new features. :+1:

It seems that MP reads the Sik radio setting of the maximum frequency not proper anymore.

First screen shot with 1.3.70. Here everything is as expected.

MissionPlanner_1_3_70
MissionPlanner_1_3_701085×614 176 KB

Second screen shot running 1.3.73.

MissionPlanner_bug
MissionPlanner_bug1307×773 81.9 KB

I have used the same (Holybro) radio for both screenshots on 1.3.70 and 1.3.73.
If I made something stupid please let me know.

Kind regards, Sascha
PS: Keep going the good work!!!

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Same RTK GPS but different performance on 2 different boards (logs and build pictures attached)

August 23, 2020, 1:45 am
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@Notorious7 wrote:

I am using arducopter 4.1.0-dev master version on 2 different boards, one is Omnibusf4SD running omnibusf4pro firmware, second is Pixhawk 2.4.8 running pixhawk1 firmware. I have setup these 2 boards on separate quadcopter frames. Both using Here+ RTK GPS. For both quadcopters, i am taking RTK GPS as primary EKF3 ALT source by setting EK3_ALT_SOURCE to 2. Also, I have kept EK3_ALT_M_NSE to default i.e. 2 for both quadcopters.

Now when using the same Here+ RTK GPS on these 2 quads one by one, there is difference in the performance of maintaining the altitude during flight while moving at a constant height(desired altitude) in guided mode.

On Pixhawk 2.4.8, GPS.Alt log of RTK GPS have altitude drift of around or within 0.5 meter, POS.Alt log of EKF3 have altitude drift of around or within 0.2-0.3 meter. On Omnibusf4SD, GPS.Alt log of RTK GPS have altitude drift of around 2 meters, POS.Alt log of EKF3 have altitude drift of around 1-1.5 meters.

Everything seems more consistent on pixhawk in every flight, but on omnibus, flights are not consistent in terms of maintaining the right altitude, from the logs on omnibus i have seen a few times even when drone is on the ground still GPS.Alt and POS.Alt vary from about 6-10 meters but satellites count and GPS.status not changing during that time. What possibly causing these differences between performance of same RTK GPS on different boards ?

I also feel that RTK GPS and baro both are not very reliable in terms of consistency in maintaining the right altitude during multiple flights. Cause i can analyse from the logs that only if baro and GPS raw altitudes able to keep themselves within 1 meter altitude drift, only then EKF able to play its part in maintaining the right altitude during multiple flights and that’s what i am looking for.

Below i am attaching 2 logs and build pictures of both quadcopters:

  1. pixhawk logs and build
    pixhawk log1
    pixhawk log2

1-min (2)
1-min (2)4160×3120 979 KB

2-min
2-min4160×3120 790 KB

3-min
3-min4160×3120 789 KB
  1. omnibus logs and build
    omnibus log1
    omnibus log2

1-min
1-min3120×4160 840 KB

2-min
2-min4160×3120 716 KB

3-min
3-min4160×3120 548 KB

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Most accurate GPS unit

August 23, 2020, 3:33 am
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@Qbertman wrote:

Could anyone please tell me what some of the most accurate GPS units available for pixhawk would be? Thanks!

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4 in 1 ESC Pixhawk Mini Wiring Help

August 23, 2020, 4:50 am
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@Qwidia wrote:

Hello. I have Pixhawk mini and RacerStar 35A 4in1 ESC for my quad. And I have trouble making quad fly. -I have a power module between esc and battery and that module also powers pixhawk (it had the wire for it and I soldered them)
-ESC’s pin outs are here as shown
image
-Pixhawk Mini’s Pin Outs are here

image
image1069×823 35 KB

I soldered the motor IN1-2-3-4 to pixhawk’s pin 1-2-3-4 (yeah it is prob wrong but easy to change). I don’t know where VBAT, CRNT, GND pins on the esc are going to plug in or necessary.
With this configs I can only make 2 motors work. And 1 motor is spinning while throttle is min. Here is the video
I’m in a hurry a little bit. I need all kinds of help of yours and will be appreciated

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ROS2 integration for Rover

August 23, 2020, 6:43 am
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@Enginerd wrote:

I’m getting farther and farther off in the weeds as my skills with ArduRover are improving. I’ve been building a small electric quad atv testbed go development with and now have it doing all the basics (still a tone of tuning to work out, and haven’t implemented reverse throttle yet) . The application will be to scale up for agriculture research . Most new products on the market currently are heavily dependent on RTK Gps for precision path planning and guidance, which will be included but for the work we are doing we can’t be dependent on it. Next major goal is going to be integrating our ROS2 companion but I’m sort of stuck in terms of understanding if that’s even possible at this point with ardurover. It appears that PX4 already has a stack for the ROS2 integration but I’m not finding anything of the sort for ardurover? I’ve searched to death looking for info and have come up empty. Does anyone know if there is anyone doing work to support ROS2 in ArduPilot platform?

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Current sensor reading drops above 50% throttle

August 23, 2020, 9:54 am
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@radlouni wrote:

Hello

i have a holybro kakute F4 FC with arduplane 4.0.5, and i configured the voltage/current parameters as per documentation below. i am facing a strange issue where the current reading increases with throttle till throttle reaches somewhere around 50%, then as i increase the throttle beyond 50% the current reading starts to drop. Any idea what might be the cause ? Thanks

  • [BATT_MONITOR] 4
  • [BATT_VOLT_PIN] 13
  • [BATT_CURR_PIN] 12
  • [BATT_VOLT_MULT] 10.1
  • [BATT_AMP_PERVLT] 17.0

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Pixhawk doesn't connect to computer and gives solid blue light

August 23, 2020, 10:55 am
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@hawker wrote:

Hello. Our Pixhawk 2.4.8 takes power but doesn’t work. Any ideas? We tried changing USB cable, deleting firmware from micro SD card but they didn’t work.

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My telemetry radios are not communicating

August 23, 2020, 10:55 am
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@byaeger wrote:

Hello all! I have a pair of telemetry radios that for some reason are not communicating. I know that they’re on the same net id because about a year ago I had ordered these and they worked perfectly and saw that they were on the same net id of 25. But now, the ground side one is blinking green. I guess it doesn’t see the other radio? I have the air radio connected to the telem port of my apm 2.8 (yes I know it’s old). I power up both radios and they don’t see each other. I also tried loading the settings from the radios through APM Planner 2, the ground radio succeeded, however, the air radio failed.

Any help is appreciated.

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Tandom Bicopter

August 23, 2020, 1:33 pm
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@Antonyg wrote:

Hi

I am experimenting with A F405-Wing flight controller.

I would like to use Ardupilot.

I have seen Videos of Tom Stanton Bicopter flying.

I’ve just had a week of research on Google for more information. But it’s very confusing and little or no details.

A Chinook type helicopter is a tandem rotor helicopter

I will be using tilting motors. From the front view the motors move sideways.

Do I use Arduplane or Arduchopter ? is the first Question.

For clarity :- Front motor. Rear motor. Front tilt. Rear tilt. Are the movement required. So two motors and two tilt servos.

Basic Functions:-

Throttle is lift. IE up and down. Both Front and rear motors the same amount of movement is used.

Pitch is the movement forwards and backwards. Increasing one motor and decreasing the other motor.

Should I use a mix of some kind here.

Aileron is sideways movement. Both Tilt servos move in same direction the same amount.

Yaw is rotation to a heading. Tilt servos move in the opposite direction the same amounts.

Should I use a Mix of some kind here ?

Any advice or help would be appreciated and helpful.

Regards Antony (Devon, UK).

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Help! Air Speed Type Setup List

August 23, 2020, 5:24 pm
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ArduPilot Monthly Update for Aug 2020

August 23, 2020, 5:33 pm
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@rmackay9 wrote:

aug2020-title-image
Here are the slides from the monthly report for July 2020 presented by Tridge, Randy and a few others at the monthly Partners call.

The image on the left is an update to the Daiwa winch which is a popular winch in Japan for drone delivery. We’ve recently updated the driver to consume the winch’s telemetry protocol which provides tension on the line and the amount of line let out.

The image on the right is from Rishabh Singh’s work on object avoidance for Copter and Rover. In this test he shows the backaway feature which is new for 4.1. Rishabh’s earlier blog can be found here and I think he’ll blog an update over the next couple of weeks.

Thanks very much to our Partners for their ongoing support!

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XTRACK Error - which track?

August 23, 2020, 7:06 pm
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@Christopher_Milner wrote:

When a rover reaches point A (technically, when it comes within WP_RADIUS of A) and does a pivot turn to navigate to B, does it attempt to navigate on the line between waypoint A and waypoint B, or, does it attempt to navigate on the line from where it turned (A’ in the below diagram) to point B? I have been looking at XTRACK error and it doesn’t always converge to 0 even when I turn up the XTRACK gain very high (like, 0.6 or 0.8).

image

What does rover use for the “previous” waypoint? Is the track the line from the previous waypoint to the next waypoint?

I really want my rover to come as close as possible to navigating on the line from A to B, even if it was not precisely at A when it stopped navigating to A and started navigating to B.

I also saw jimovonz’s comment here https://gitter.im/ArduPilot/ardupilot?at=5e17f92a9c13050f1fa49663

@jimovonz @rmackay9

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First time set-up - Quadcopter with Kakute F7 and Tekko 4in1 ESC

August 23, 2020, 7:06 pm
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Different font used in latest version 1.3.73?

August 23, 2020, 8:27 pm
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@Karl_Schoelpple wrote:

Has the font been changed in latest Mission Planner?
If so, what is it now?
Been using MP in Linux for the past few years. But suddenly after upgrading to 1.3.73 certain items don’t show up anymore. As they still do on a Microsoft based computer I have to assume it is related to a different font type.
Any idea what type it is ?
Thanks

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Connecting companion computer to omnibus f4 V3 - UART not working. Need troubleshooting help

August 23, 2020, 9:08 pm
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@UnoTheHippo wrote:

Hey
This is my first time building anything like this. I having some issues with UART not working between my omnibus F4 v3 and my raspberry pi zero w.
I made sure that the tx pins and rx pins were connected on both FC and CC. Originally set the baud rate to 921 600 (throughout my troubleshooting this changes). Set the serial protocol to mavlink 2.

Things I’ve tried:
On Pi side:
-Peter Burke’s Mavlink build - This searches multiple Buad rates (No luck on any rates)
So i thought i may have stuffed up the set on this build. So i notice that Rpanion-Server provides an
image ready build. So i thought if i used this it would rule out a pi side software issue.
-Rpanion-Server v0.6 pi zero build - No luck again.

On FC side:

  • Tried all different baud rates
  • Tried uart 1,3 and 4 to check it wasnt a serial problem -no luck

Is there anything i can do on to check that the pi’s uart is working properly? I dont have a spare FC. But i do have an old raspberry pi sitting around. Other than that let me know if i may have missed a something.

Thanks,
Uno

Edit: I bought my FC from banggood. This might be a fake board causing some issues.

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Mission Planner Multi Copters

August 23, 2020, 10:19 pm
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@Peter2 wrote:

Hi guys…
Can anyone help me to connect multi uav to Mission Planner and use Swarm. I saw the Multi Uav page but I don’t have antenna tracker. Any idea please

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