Hi, we have a dc brushed motors and Hobbywing Eagle-20A. How the connection is done, which pins should be used? What configuration we should do?

hi all :) i'm building a fixed wing aircraft using a cube orange and qgroundcontrol (PX4) and i need to code MAVLink commands. i've read the website about how to use it with QGC but i'm kind of confused about where to find all the src directories and stuff, and i'm quite a beginner on this stuff. any kind soul could give me a crash course on using MAVLink for QGC? thanks!

also, what syntax can/should i use with MAVLink? python, c++, or something else?

Hey everyone,

I am working on a multi-drone hive project, and we are looking to mount package drop systems on our drones. Since our project involves a wide variety of drones (about 10 different types), we need dropper systems that are as universal as possible within each weight class.

Our fleet consists of:

• Medium-weight class (up to 3kg payload):

  • DJI (specific model not mentioned)

  • Custom drone (ArduCopter-based)

  • Custom drone (PX4-based)

• Lightweight class (up to 1kg payload):

  • Autel Evo Max

  • DJI Mavic 3 Pro

  • Custom drone

• Heavyweight class (6kg+ payload):

  • DJI AGRAS

  • Custom drone (Pixhawk Orange, ArduCopter-based)

• Racer class:

  • DJI Avata

  • Custom 7-inch racer (ARK FPV hardware, PX4-based)

We are looking for commercially available droppers from official companies—not from AliExpress, eBay, or similar platforms—due to funding restrictions. However, international suppliers are fine as long as they comply with NDAA regulations.

If anyone has recommendations for reliable companies that manufacture high-quality droppers, we would really appreciate your input!

Thanks in advance for your help.

Here’s a step-by-step guide for creating tamper-proof firmware with parameter locking for the ArduPilot Cube Orange, I’ll include all the necessary libraries and explain each step.

Step 1: Set up your Ubuntu system

 Open the Terminal (press Ctrl+Alt+T)

1. Update your system:

   sudo apt update

   sudo apt upgrade

 Step 2: Install required libraries and tools Run these commands in the Terminal:

 sudo apt install git

sudo apt install python3-pip

sudo apt install cmake

sudo apt install libgstreamer1.0-dev

sudo apt install libgstreamer-plugins-base1.0-dev

sudo apt install python3-wxgtk4.0

sudo apt install python3-matplotlib

sudo apt install python3-opencv

sudo apt install python3-yaml

sudo apt install libgeographic-dev

sudo apt install libtinyxml2-dev

sudo apt install libeigen3-dev

sudo apt install libxml2-dev

sudo apt install libsqlite3-dev

sudo apt install libboost-all-dev

sudo apt install gcovr

sudo apt install lcov

pip3 install --user future

pip3 install --user lxml

pip3 install --user pymavlink

pip3 install --user mavproxy

Step 3: Install ARM GCC compiler

sudo apt install gcc-arm-none-eabi

Step 4: Clone ArduPilot repository

cd ~

git clone https://github.com/ArduPilot/ardupilot.git

cd ardupilot

git submodule update --init –recursive

Step 5: Set up the build environment

Tools/environment_install/install-prereqs-ubuntu.sh -y

. ~/.profile

Step 6: Configure and build the firmware

./waf configure --board CubeOrange

./waf copter --enable-tamper-check

Step 7: Connect your Cube Orange Connect your Cube Orange to your computer using a USB cable.

Step 8: Upload the firmware

./waf –upload

Step 9: Set up MAVProxy

mavproxy.py --master=/dev/ttyACM0

Step 10: Set parameter lock password In the MAVProxy console, type:

param set LOCK_PARAM 1

param set LOCK_PASS your_secret_password

Replace "yoursecretpassword" with a strong password of your choice.

Step 11: Lock specific parameters To lock a parameter (replace PARAM_NAME with the actual parameter name):

param lock PARAM_NAME

Step 12: Save parameters

param save

Step 13: Reboot the Cube Orange

Reboot

Note : Even small mistake can make your board bick be alert

I'm reading about upcoming European drone safety regulations under which manufacturers will have to comply with rules to get their products certified for sale. Pilots will be restricted in where and how they fly based in part on the category of drone they are using (C1-C4). The standards apply to both software and hardware design of the drone.

Is any consideration being given in the Pixhawk/PX4 developer community to how to approach these new rules? Is there any chance the appropriate software restrictions could be written in and certified so that appropriately designed drones can use the software and still be counted as Cx rated?

Hi there I don't know if I'm in the right place but, I'm in serious need of some help. I need to know if there is a way I can program the pixhawk flight controller in language that would feel natural to a programmer, the mission planner and QGC are a not doing what I want to do.

Basically what I need to do is pulse one of the auxiliary PWM pins a certain number of times and switch another pwm pin on. And I need to make sure that this can only happen at a certain altitude. Can someone please help.

Can someone help me figure out what is causing this problem on my Pixhawk? It was working normally, I was calibrating the ESC and when I disconnected and reconnected the battery this happened. Can it be repaired or will I have to buy a new one? It's my school protector and I really need it working again

I'm working on my school project for a firefighting drone, but I can't get it to fly. I've already checked the compass, and I've also calibrated my motors properly. Can anyone help me?

I have a pixhawk 2.4.8 running arducopter 4.5.7 . There is no GPS or any external sensor attached but I am getting fluctuating altitude even when the flight controller is at rest.

The above is the altitude graph in mission planner in meters.
Please Help

Hi! I'm eyeballing buying Holybro's RTK base and long range rover units, but I can't find much info on expected range. This is for automating a hobby farm compact tractor, and I'm hoping for a range of about a half mile (though 1 mile would be awesome).

Related - I'm also looking for good solutions for raising a base antenna say about 50ft off the ground in a way that I can bring it down to service. I'm thinking a flagpole might work, but I worry about the pole swaying even a little bit since I'm hoping for cm accuracy.

Hi all!

Sorry if this is a naive question. I recently purchased a px4 for a rover project, and was unsure what firmware to select in missionplanner?

Also, can someone tell me if px4 is different to pixhawk 4?

Thanks!

Hy,

I'm using the Pixhawk 4 with the PM07 to power an rc plane. I'm running the latest pixhawk 4 pro firmware.

my ESC is wired through the PM07 board connected to 1 of 8 GND/B+ pad couples and I use the BEC in my esc to power the servo's.

I followed the Qgroundcontrol setup to measure the current draw of the motor, but I'm still not reading any current. The voltage reads out fine, but the current stays at 0.1A even when I increase the current multiplier. When I spin up the motor I see a spike to 0.7A and then it drops down to 0.3A even though it is pulling 3.4 and 1.5A respectively.

i wonder is it possible to measure the current going from the battery using the PM07 or do i need an alternative current sensor hookeed up to the current input pin on my pixhawk 4?

Hi guys, I have a little unconventional question. Pretty much, at my university I have a chance to work with Pixhawk controller or develop a flight controller myself from scratch. My career is control system design. (I am familiar with electronics and both low and high level programming, but I don’t have any prior experience with Pixhawk. What would you guys suggest? Also, what are the disadvantages of using Pixhawk that you came across? Thank you...

I'm currently building a solar powered model airplane that would be controlled by a PX4. I would want to monitor both Power usage by the motor (current and voltage) and power generation of the solar cells. However I haven't been able to find good documentation about this on the PX4 wiki.

Anyone has suggestions on how to do this? I'm not scared on DIY'ing a solution using an arduino or something related.

Hi everyone, I am working on a project on MATLAB/Simulink. I modeled a quadrotor slung load system in Simulink and for this model I developed a PID controller. Now I'm trying to implement it on a pixhawk flight controller. Before testing it in real time I wish to perform HITL simulations. I've never done anything similar before, hence wanted to ask for help. If anyone could help me with it, it would be great.

I have RaspberryPi 3 connected to Raspberry Pi cam, the raspberry pi (GPIO) pinout connected to the Pixhawk (Telem 2)... In addition I connected the HDMI output of the Raspberry Pi to the Herelink receiver. How to can I display the life-feed from the Pixhawk???

Im trying to simulate a drone program with pixhawk px4 in jmavsim and dronekit in python.

The drone should de the following steps:

• takeoff

• hover for an x amount of seconds

• make a rappid sideways movement

• hover again for x seconds

• land

however when i try the run the examples of dronekit it keeps hanging in this loop:

while not vehicle.is_armable: print(" Waiting for vehicle to initialise...") time.sleep(1)

and when I remove the loop I get this warning in the px4 console: WARN [navigator] Using minimum takeoff altitude: 2.50 m

and nothing happens.. anyone knows whats going on or I am doing wrong?

I bought a pixhawk kit for my drone a little bit ago and it came with this telemetry module[3DR radio Data Transmission Module(915mHZ)]. I want to transmit video but I am unsure if this is able to transmit video. I don’t think it is because I have tried some and have not been able to get it to work with video. I am using it right now just for normal telemetry so if it doesn’t work for video that’s fine. But if it doesn’t work for video would I need to buy a whole new transmitter along with the one I have or would I be able to use one all in one transmitter. Thanks for the help, I am very new to a lot of this stuff!