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Quick, easy and useful (at least, for me) question

June 25, 2020, 12:44 pm
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Hi everyone, hope you are doing it all right these days.

I don’t use to ask question with no previous research, but as I am totally new in this world and there is a tones of electronic words, terms and info (english is not my language) I would rather like to seek for some help and save up time (and money), so please don’t get me wrong.

I will use a drone to take pictures in farming. I was thinking “connecting” the Pixhawk controller to computer, set the path (and all configuration that goes with it) to take pictures, release the drone, wait for it to do the job, get back and download the pictures. As far as I can see, no communication will be necessary between Pixhawk controller and computer during the trip.

My question is: is that possible? In that way, I won’t need to get a radio controller, nor “RC receiver and compatible transmitter” (shown as “required components” in QAV250, for example), right?

I need to know before buying, if what I buy is enough or if I am missing something. Is not that easy in my country to get stuff from outside, and if I make a mistake in my purchase I may get stuck for a couple of months, until I get following shipment.

Any help will be more than appreciate, really. And if you need further information, please let me know.

Thanks for you time and patience, Juan.

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4in1 ESC to pixhawk mini clarification

June 30, 2020, 10:33 pm
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Hello All,

This topic has been discussed on the forum but no wiring pics or pin details were ever uploaded to explain how to connect a 4in1 ESC to a pixhawk 4 mini. I know how to connect the motor pins but my question is which power pins do I connect if I don’t care about measuring current or voltage?

From what I can tell, all that I have to connect is between the 4 in1 ESC and pixhawk on the power connector, is pins 1 (+5V) and pin 6 (GND). Is this correct?

Thanks in advance, any advise is appreciated.

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Optical flow reject position control

July 2, 2020, 2:41 pm
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Hello,
I am trying to use the flow breakboard https://docs.px4.io/master/en/sensor/pmw3901.htmland teraranger one (https://www.terabee.com/connection-to-pixhawk-autopilots-teraranger-one/) to do indoor flight control. I am running px4 1.9.2 on a pixhawk 4. I followed the tutorial on PX4 to set:
EKF2_AID_MASK = 2
EKF2_HGT_MODE = range sensor
EKF2_OF_QMIN = 0
EKF2_RNG_AID = enabled

I can see that both sensors are working in MAVlink inpector. But it continues to reject the position control. I have checked the available posts here. Seems people are haveing the same issue with me but without a working solution. Could you anyone guide me how to solve this? Thanks!

I found that when I plug the battery in (powering the distance sensor), the pmw3901 will lose connection. I will try to figure out what’s wrong with the circuit.

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Would appreciate strategy help for diagnosing PX4-battery issue

July 5, 2020, 10:18 am
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Hi all-

After a few days of sifting through forum posts etc. trying to claw my way up the steep PX4/QGC learning curve, I think it’s time to ask for some help. I have a PX4 + PM07 on my quadcopter (stripped-down Parallax Elev-8) and I have been unable to configure the Power. Here’s some particulars:

  1. QGC reports a pretty close value for the actual voltage of my 3S battery. (resulting in a display of ~95% full battery.)

  2. When I try to calibrate, I get a ‘Dangerously low battery!’ warning, followed by ‘System does not support shutdown.’ This does not seem to match with #1, but I haven’t been able to figure out how to convince the PX4 that the battery is in fact charged.

It seems as though the power calibration is the way to get at this, but as I said I cannot get this step completed. By the way, the number of cells and full/empty voltage per cell seem OK, and the Amps per volt is 36. (The quad draws about 0.05 A in standby.)

Here’s what the battery status looks like:

image
image752×335 37.2 KB

Couple of weird things in here: one, I don’t have 17 batteries. (I’m sure that’s counting something else!) two, there seem to be a lot of entries missing compared to examples I’ve found online.

Any pointers to other clues I need to gather would be much appreciated!

thanks,
Patrick

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Best gimbal (GoPro4) to use with PixHawk4

July 7, 2020, 10:51 pm
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Hi

I am planning to build a 450 photography quad. I need to get a gimbal for my GoPro. What brand who you suggest?

Thanks

Didier

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Gimbal with QGC and Mission Planner

July 8, 2020, 12:09 am
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Hi
I am planning to get a gimbal to use with the Pixhawk4. There is no UI in QGC to setup the gimbal. So can I use Mission Planner to set it up?
MP has a great UI to do it.
In essence I would be using both apps to set up the quad.
Would that work?

Thanks

Didier

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Advice for External sensors with PX4 Data Gathering

July 10, 2020, 12:20 am
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Hi
I want to install Pixhawk on an manned ultralight aircraft only to log data… as a flight data analyzer…(NOT AN AUTOPILOT)
1- I may need to install an external temperature and barometer sensor. I found some documentation about connecting MS5611 directly to Ardupilot… Is this option available in PX4 as well or not? How? Clearly My altitude estimation should use external sensor data instead…

(One more thing… If I want to use Pixhawk Cube, does it measure the outside air temperature or the internal (Temperature controlled) section temperature?

2- I want to a read and log some load-cell values as well… They may be Analog or SPI data… Can I just simply connect them to ADC GPIOs and read them back on QGC? How can I do some calculation with them in the Code? I am planing to use simulink embedded coder for PX4 … but I am not sure if it is a good idea or changing the firmware code is better

Please help me in this relatively new topic for me
Thanks

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Connecting Pixhawk 2.1 Cube to FrSky X8R

July 11, 2020, 2:15 pm
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Hi I’m trying to connect my new Pixhawk 2.1 Cube to the FrSky X8R receiver. The connector that came with the kit had 6 slots for the pins from the receiver, but the receiver itself has four pins. Does anyone know of a good way to connect these two, or a website that sells a connector? Thanks in advance!

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1st Build - Several questions HELP! HELP!

July 12, 2020, 12:37 pm
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Hello out there! So I’m building my first quadcopter, felt perfectly confident going into it and now I see I have several questions that have brought my build to a halt. Any help would be greatly appreciated.

overall
overall2256×4032 635 KB

Here’s what I have:
HolyBro x500 kit Link to the kit

Radiolink transmitter/receiver: Radiolink AT10II Transmitter / Receiver R12DS

HRB 4S 14.8v 5000mAh Lipo XT60 Batteries

RunCam 4k Dual lens Camera: Camera

Flysight Black Pearl Monitor

Crazepony FPV Transmitter Rush Tank 5.8GHz

Okay so here’s where I have questions:

  1. How in the heck does the Radiolink R12DS connect to the pixhawk 4 unit? The connections on the existing wires are not direct plug ins the the style on the pixhawk. And is the RadioLink Radiolink AT10II even a compatible unit for the pixhawk? Is there a better suggestion for a tx/rx in this price range?

UPDATE: I saw another video on the tx/rx, do I have my wiring correct now? See update pic below. I also see that the PRM-01 sensor provides telemetry data on the battery status. Is this strictly for the battery whereas the HolyBro telemetry radio provides additional info? Am I doubling up on telemetry or are both useful in their separate ways?

Txrx3
Txrx34032×2268 540 KB
  1. I have the RunCam dual camera and the Rush video transmitter, is this a compatible setup and reasonable for the X500? And assuming yes, where am I connecting these wires to?

camera
camera2256×4032 537 KB

  1. Telemetry Radios: I see the kit came with two radios, am I using two in my setup? I see it plugs directly into the pixhawk 4 unit, that’s easy enough. So next, does it simply collect data and send it out to my RadioLink transmitter? Also, what is the second radio for???

  2. On the motors, they connect to the small adapter, which then connects to i/o PWMOUT port. I have seen this setup on the HolyBro instructions. Do it matter which plug goes to which pins? Do I need motor one going to pin 1 for example?

Motors connection
Motors connection2256×4032 387 KB
  1. On the PM07 power management board, is the only thing connecting to it just the black and red wired from the motors, and the power cable from it to the pixhawk?

pm07
pm072256×4032 551 KB

Thank you in advance, I’ve spent hours searching for answers and I want to get my questions out there as I continue to search. I swear I though I had this setup down and understood!

Thank you in advance,
LM

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Which pixhawk is mare suitable for drone delivery?

July 13, 2020, 4:08 am
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Hello everyone,

I want to buy a pixhawk for my drone delivery project but ı could not decide which flight controller is the most suitable one. I am between pixhawk 1 and 4. what is your suggestion ?

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First Flight test with PX4

July 14, 2020, 3:33 am
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Hello Dear Community.

I have followed the instructions to set up the px4 before flying.
When I went out to test the quadcopter, I saw that the quad is not hovering in its place but is slowly moving to the right side and then I want to place the drone 2 meters above the ground but it is not possible, when I move the joystick to take off I have to move the joystick until it is 50% and then the drone can only take off and when the drone takes off it goes up very fast more than 3 meters, so I move the joystick a little to lower the drone and the drone goes down very fast and sometimes it hits the ground.

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Advanced tuning setup

July 14, 2020, 11:19 pm
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Dear all @Jaeyoung-Lim
I want to PID tuning using ‘Advanced Tuning Setup’ of Qgroundcontrol for quadcopter with pixhawk4.

First, I tested the Pixhawk 4 by connecting the PC and usb cable, and confirmed that the reaction is good as shown below.

Cable_Connection
Cable_Connection1487×745 115 KB

However, when I tested by telemetry(Holybro) connecting the pixhawk4, the response of Roll Rate does not respond and the response cycle is very slow as shown in the figure below.

telemetry_Connection
telemetry_Connection1494×769 113 KB

Is this a telemetry problem that I use?
Has anyone ever tuned using Advanced Tuning Setup like me?

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Motors start beeping and turn minimal after 10 minutes standby

July 16, 2020, 12:05 am
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Hello everybody,

we noticed that the motors of our quadcopter start beeping and turning minimally after a 10 minutes standby. We could not find an easy way to disable this and it becomes a bit irritating while working with the copter. Is there a parameter that I didn’t see which would disable this?

The only method we have right now is to spin the motors once or reboot the pixhawk.

Thanks in advance.

Best,
Christian

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Preflight fail baro sensor 0 missing

July 16, 2020, 4:30 am
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Hello,

I’m flying with Pixhawk 4 mini and when I try to arm my quad i get this message: “preflight fail baro sensor 0 missing”. It was 5 minutes after a successful flight.
When I check the devices on my Pixhawk I do not see any baro0 or ms5611 devices:

noBaro
noBaro579×703 44.8 KB

I have another Pixhawk 4 mini and when I check its devices I do get baro0 and ms5611:

bero
bero584×757 46.8 KB

Is this a hardware problem?

Thank you very much

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Pixhawk with Phantom controller

July 17, 2020, 10:32 am
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Hi there, i am new to drone building. Can Anyone tell me if its possible to control the pixhawk with a Phantom controller and receiver? Thank you!

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Signal voltage low from i/o and FMU port of Pixhawk 4

July 18, 2020, 5:07 am
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Hello,

I am currently new to the holybro Pixhawk 4 flight controller, and I have followed all the steps to assemble the flight controller and its components (PM board, telemetry, GPS module Flysky ppm receiver and 3S lipo battery) to my octacopter setup (T motors AT2317 880KV, Flame 40A esc and 1045 Propellers). My issues is that the motors do not run even when I successfully arm the system . I checked and pwm output from a digital multi meter and there is no signal coming from either the i/o port or FMU port, all I get is a constant noise of 1.2V from the i/o signal pins and 3.2V from the FMU ports. I tried all combinations of using the PM i/o and FMU ports but still get the same noise signals. I even tried the mavlink console using the commands,

pwm arm
pwm test -d /dev/pwm_output0 -a -p 1500

there were still no changes to the pwm signal outputs. I dont know what im doing wrong and it would be helpful if i could get some assistance on the same. I have attached a photo regarding this as well. Thankyou for your time and consideration.

Regards,
Rohith

IMG_20200718_163638
IMG_20200718_1636384000×3000 3.69 MB

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New build and Tarot gimbal

July 18, 2020, 1:10 pm
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Hi, I am building two “new” 450 quads. The first one is a re-build of my old Iris + , I re-used all the Iris parts, electronics, arms and motors, excluding the black body, I printed new parts/plates to replace it. The board runs Ardupilot and shows up OK in APM planner.
The original Tarot gimbal shows up in APM planner and can be set-up.
Once all the parts are back on it should work as the old Iris+

So far so good

The second 450 quad, is brand new, new 450 frame, the board: Pixhawk4 running PX4 OS. all parts from Hollybro including the PDB. I also intend to use a new Tarot 3D gimbal with my GoPro Hero4. i pretty well understand how to connect everything but for the gimbal, I have not found anywhere any info on where to connect the gimbal to the board so I can control it with my radio (either my old Taranis or the new Jumper T16) like can do with the one on the Iris +.

Now, the interesting part, it is possible (I have done it once to try it) to flash the Pixhawk4 with the Ardupilot OS using QGC. , the board then is recognized by APM Planner and there is available a UI screen to set-up the gimbal.

But then I still do not know where to connect the new gimbal wires, the power ones connections are easy enough to figure out, but where do attached the other ones to the board so I can use it with my T16?

So here are two questions
1 -should I flash Ardupilot on the Pixhawk4 to replace PX4
2- do any of you know how to connect the 3D tarot gimbal to the Pixhawk4.

Thanks

Didier

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EKF baro hgt timeout - reset to baro error and pixhawk don't send yaw signal correctly

July 22, 2020, 11:17 am
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Hardware
Pixhawk 1( FMUv2)
Ublock Neo M8N
Flysky FS-X6b receiver
Flysky FS-i6x transmitter

LINKS
Logfile -------> https://review.px4.io/plot_app?log=3d15dd7a-08a8-4bb9-a609-7a38db018d6b
Flight video -----> https://drive.google.com/file/d/1Z8uHmWL6_KEJ8mNRKEliYbZ22ysOk5SL/view?usp=sharing

As you can see from the log file, after some time I take EKF baro hgt timeout error. Also, this error repeated 12 times. At the beginning, there was no problem but when we force to the drone(left-right side movements or yaw movements) after 5-10 seconds we lost the drone’s control and we got an error this called EKF baro hgt timeout - reset to baro error at 08:06 minutes(you can see it from log file).After we got this error the drone immediately high up to the sky even we did throttle level is zero so we lost the drone’s control for a while.When the error stop for a while we could have took down the drone with very bad control. If we check the yaw control from the yaw graphs, yaw control looks working all the flight time but we could not have yaw control during the flight. Even we try to control yaw movements from the controller the drone did not take any reaction.

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Pixhawk 4 mini Firmware issue

July 23, 2020, 12:13 pm
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Hi,
I am using a Pixkhawk 4 mini for making a quad copter. As soon as i burn the firmware from Qground Control(stable,beta,developer version), The QGC Pop’s out a notification and tells that a parameter is missing, Once i close it, I get an another error message stating " Parameters are missing from firmware,You may be running the version of firmware QGC does not work correctly or your firmware has a bug in it. Missing Params: 1:BAT_V_CHARGED,-1:BAT_N_CELLS,-1:BAT_V_EMPTY,-1:BAT_V_CHARGED"

I tried installing different versions of QGC, still the same issue persists with firmware’s.
Kindly help. Thanks in advance

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Power breakdown mid-flight

July 24, 2020, 4:39 pm
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We can not takeoff, motors can not speed up more than %50 throttle. Power is waving like sometimes it gets faster and suddenly slows down. When we get in the air by luck, power is gone in mid-flight.

https://review.px4.io/plot_app?log=212133c2-f963-4320-8f81-f867fd4ad0e1

https://youtu.be/NmQyIlHmJLk](https://youtu.be/NmQyIlHmJLk)

It seems like we can not exceed 1500us. RC is calibrated. Tested in other quads.
PDB replaced. Pixhawk replaced( Pixhawk 4). Nothing changed.
Motors: sunnysky 4108 380kv (quad)
ESC: https://www.roboshop.com.tr/30a-2-6s-simonk-esc
The build is around 2400 gr. This setup should lift 7 kg (8kg lift at the max throttle)

What could be the problem?

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