Unable to access px4 with qgc in voxl 2 using usb-jst cable

Eric Katzfey

@Tamas-Pal-0 You can get a voxl-dev branch package from here: http://voxl-packages.modalai.com/dists/qrb5165/dev/binary-arm64/voxl-px4_1.4.19-202208111710_arm64.deb. Install that package instead of trying to copy files over manually.

Tamas Pal 0

@Eric-Katzfey
The voxl-px4-hitl is still missing in the package. I have installed it and tried to run voxl-px4-hitl command. It is not working. I have shared the terminal syntax below. How to fix it?

voxl2:/$ sudo dpkg -i voxl-px4_1.4.19-202208111710_arm64.deb
(Reading database ... 81777 files and directories currently installed.)
Preparing to unpack voxl-px4_1.4.19-202208111710_arm64.deb ...
Unpacking voxl-px4 (1.4.19-202208111710) over (1.4.19-202208111710) ...
Setting up voxl-px4 (1.4.19-202208111710) ...
Found DSP signature file
/
voxl2:/$ sudo apt-get install -f
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
voxl2:/$ voxl-px4-hitl
bash: /usr/bin/voxl-px4-hitl: Permission denied
voxl2:/$ sudo voxl-px4-hitl
sudo: voxl-px4-hitl: command not found

Zachary Lowell

Hi Tamas - please run a chmod +x /usr/bin/voxl-px4-hitl and that will enable permissions. After running that, you can run voxl-px4-hitl from any directory and it will work.

Tamas Pal 0

@Zachary-Lowell
Aftert running the voxl-px4-hitl command I am still gettting an output like this. Is it fine? If not how to solve the problem?

voxl2:/usr/bin$ chmod +x /usr/bin/voxl-px4-hitl
voxl2:/usr/bin$ voxl-px4-hitl 
Found DSP signature file
Setting GPS Parameters for HITL
INFO  [px4] mlockall() enabled. PX4's virtual address space is locked into RAM.
INFO  [px4] PX4 daemon already running for instance 0 (Success)
INFO  [px4] mlockall() enabled. PX4's virtual address space is locked into RAM.
INFO  [px4] PX4 daemon already running for instance 0 (Success)
voxl2:/usr/bin$

Eric Katzfey

@Tamas-Pal-0 Looks like px4 was already running. It was probably automatically started on system bootup using the systemd service. What is the output from voxl-inspect-services?

Tamas Pal 0

@Eric-Katzfey

voxl2:/$ voxl-inspect-services 
 Service Name         |  Enabled  |   Running   |  CPU Usage
---------------------------------------------------------------
 docker-autorun       | Disabled  | Not Running |  
 docker-daemon        | Disabled  | Not Running |  
 modallink-relink     |  Enabled  | Not Running |  
 voxl-camera-server   |  Enabled  | Not Running |  
 voxl-cpu-monitor     |  Enabled  |   Running   |     0.0
 voxl-dfs-server      |  Enabled  | Not Running |  
 voxl-imu-server      |  Enabled  |   Running   |     0.0
 voxl-mavlink-server  |  Enabled  |   Running   |     0.0
 voxl-modem           | Disabled  | Not Running |  
 voxl-portal          |  Enabled  |   Running   |     0.0
 voxl-px4-imu-server  |  Enabled  |   Running   |     0.0
 voxl-px4             |  Enabled  |   Running   |     0.0
 voxl-qvio-server     |  Enabled  | Not Running |  
 voxl-softap          | Disabled  | Not Running |  
 voxl-static-ip       |  Enabled  | Not Running |  
 voxl-streamer        |  Enabled  |   Running   |     0.0
 voxl-tag-detector    |  Enabled  | Not Running |  
 voxl-tflite-server   |  Enabled  |   Running   |     0.0
 voxl-time-sync       | Disabled  | Not Running |  
 voxl-vision-px4      |  Enabled  |   Running   |     0.0
 voxl-wait-for-fs     |  Enabled  |  Completed  |  
voxl2:/$

As mentioned by @Zachary-Lowell the voxl-px4-hitl file is not executable as shown in the youtube video https://www.youtube.com/watch?v=ysvpJdXFWaM&ab_channel=AscendEngineering
how to get the voxl-px4-hitl executable file?

Eric Katzfey

@Tamas-Pal-0 sudo chmod +x /usr/bin/voxl-px4-hitl

Tamas Pal 0

@Eric-Katzfey The voxl-px4-hitl is still missing. I followed all the steps but the executable file voxl-px4-hitl is still not there

voxl2:/$ wget  http://voxl-packages.modalai.com/dists/qrb5165/dev/binary-arm64/voxl-px4_1.4.19-202208111710_arm64.deb
--2022-08-25 10:05:37--  http://voxl-packages.modalai.com/dists/qrb5165/dev/binary-arm64/voxl-px4_1.4.19-202208111710_arm64.deb
Resolving voxl-packages.modalai.com (voxl-packages.modalai.com)... 35.215.116.197
Connecting to voxl-packages.modalai.com (voxl-packages.modalai.com)|35.215.116.197|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 5093080 (4.9M) [application/octet-stream]
Saving to: 'voxl-px4_1.4.19-202208111710_arm64.deb'

voxl-px4_1.4.19-202 100%[===================>]   4.86M  1.86MB/s    in 2.6s    

2022-08-25 10:05:41 (1.86 MB/s) - 'voxl-px4_1.4.19-202208111710_arm64.deb' saved [5093080/5093080]

voxl2:/$ dpkg -i voxl-px4_1.4.19-202208111710_arm64.deb 
(Reading database ... 81777 files and directories currently installed.)
Preparing to unpack voxl-px4_1.4.19-202208111710_arm64.deb ...
Unpacking voxl-px4 (1.4.19-202208111710) over (1.4.19-202208111710) ...
Setting up voxl-px4 (1.4.19-202208111710) ...
Found DSP signature file
/
voxl2:/$ apt-get install -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
voxl2:/$ sudo chmod +x /usr/bin/voxl-px4-hitl
voxl2:/$ voxl-px4-hitl 
Found DSP signature file
Setting GPS Parameters for HITL
INFO  [px4] mlockall() enabled. PX4's virtual address space is locked into RAM.
INFO  [px4] PX4 daemon already running for instance 0 (Success)
INFO  [px4] mlockall() enabled. PX4's virtual address space is locked into RAM.
INFO  [px4] PX4 daemon already running for instance 0 (Success)
voxl2:/$

how to fix this ?

Eric Katzfey

@Tamas-Pal-0 voxl-px4-hitl isn't missing. Your screen shot shows you executing it. But as I said in the earlier response you already have px4 running and when you execute the command it won't allow you to run a second instance of px4.

Eric Katzfey

@Tamas-Pal-0 In order to prevent px4 from running automatically in the background as a daemon on system startup use systemctl disable voxl-px4 and then sync. Reboot voxl 2 and then try voxl-px4-hitl again.