Voxl uses systemd for startup. You create a "service" file to implement your desired startup action and place it in the /etc/systemd/system directory. There are lots of guides and documentation on the Internet about how to create systemd service files. You can also look at the service files already on Voxl for some examples.
There are a few steps you can take to bring up a new USB camera. First of all, the camera must be UVC compliant. The best thing to do is to test it out on a Linux PC first and verify that it works there. Some tips: 1. Use the 'lsusb' command before and after you plug the camera in to see if it is showing up. 2. If you see the device with 'lsusb', look in /dev to see if it shows up as a /dev/videox device. So, do 'ls /dev/video*' before plugging in the camera and after plugging in the camera to see if it appears. 3. If everything looks good you should be able to stream from it using voxl-streamer.
@PawelJ Bear with us. Our subject matter experts are out on summer vacation this week.
No, you shouldn't need anything special to see it with 'lsusb'. If you run 'dmesg -wH' and then plug in the camera do you see any messages printed? Another thing you can try is to free up the adb port by using ssh over wifi instead of adb. Then plug the camera into the adb port and see if you see it with 'lsusb'. It's possible you are seeing a power issue and the adb USB port can deal with more power.
@PawelJ Bear with us. Our subject matter experts are out on summer vacation this week.
@PawelJ We will investigate this and see why you lost the calibration files when flashing 3.3.0 system image.
@Daniel-Ryu Are you able to see the video in another viewer, like VLC?
@PawelJ Yes, I think it is related to the system image flash procedure https://docs.modalai.com/flash-system-image/ It will wipe the /data partition where the calibration files exist unless you tell it not to do that.
@znn This looks like you are in "soft ap" mode on wifi. You need to be in station mode on wifi in order to get access to the network. https://docs.modalai.com/wifi-setup/#configure-station-mode
@Kasum-Hussain If you need the space just to build the docker image then you can use an SD card instead of /data.
M: !!opencv-matrix
rows: 3
cols: 3
dt: d
data: [ 2.7874039916528164e+02, 0., 3.3988271378331154e+02, 0.,
2.7880227185614154e+02, 2.5258101356853410e+02, 0., 0., 1. ]
!!opencv-matrix
rows: 4
cols: 1
dt: d
data: [ -1.4185703635329491e-02, 2.1172901376532889e-02,
-1.4431453715214168e-02, 3.4931558175981398e-03 ]
width: 640.
height: 480.
distortion_model: fisheye
@PawelJ When you run the install script to flash the system image there is a prompt that asks if you want to preserve the /data partition where the calibration files are stored. Normally you preserve those unless you want to calibrate the cameras yourself. If the calibration files have been deleted then you need to get them replaced. You can run the calibration procedure yourself. The documentation is here: https://docs.modalai.com/calibrate-cameras/
@plusk01 Excellent, thanks for sharing!
