In Raspberry Pi 4B，I can use realsense viewer to view the camera, but I cannot call the camera through Python programs, #12937

2317-2317 · 2024-05-17T14:49:24Z

2317-2317
May 17, 2024

In Raspberry Pi 4B，I can use realsense viewer to view the camera，

but I cannot call the camera through Python programs,and it keeps showing No device connected

MartyG-RealSense · 2024-05-18T09:18:29Z

MartyG-RealSense
May 18, 2024
Collaborator

Hello, is the camera also not detected if the test script below is run?

import pyrealsense2 as rs

# Create a context object. This object owns the handles to all connected realsense devices
pipeline = rs.pipeline()
pipeline.start()

try:
    while True:
        # Create a pipeline object. This object configures the streaming camera and owns it's handle
        frames = pipeline.wait_for_frames()
        depth = frames.get_depth_frame()
        if not depth: continue

        # Print a simple text-based representation of the image, by breaking it into 10x20 pixel regions and approximating the coverage of pixels within one meter
        coverage = [0]*64
        for y in range(480):
            for x in range(640):
                dist = depth.get_distance(x, y)
                if 0 < dist and dist < 1:
                    coverage[x//10] += 1

            if y%20 is 19:
                line = ""
                for c in coverage:
                    line += " .:nhBXWW"[c//25]
                coverage = [0]*64
                print(line)

finally:
    pipeline.stop()

1 reply

2317-2317 May 19, 2024
Author

Thank you for your reply, but the result has not changed and still shows No device connected

MartyG-RealSense · 2024-05-19T08:35:03Z

MartyG-RealSense
May 19, 2024
Collaborator

There was a past case where running a pyrealsense2 script in Thonny caused an error but it worked if the script was run from the terminal.

1 reply

2317-2317 May 19, 2024
Author

I have reinstalled librealsense again, and now even the realsense viewer cannot connect to the camera。
pi@pi:~ $ realsense-viewer
19/05 18:51:41,216 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video0 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.0/video4linux/video0
19/05 18:51:41,314 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video1 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.0/video4linux/video1
19/05 18:51:41,315 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video2 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.0/video4linux/video2
19/05 18:51:41,316 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video3 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.0/video4linux/video3
19/05 18:51:41,317 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video4 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.3/video4linux/video4
19/05 18:51:41,318 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video5 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.3/video4linux/video5
19/05 18:51:42,201 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video0 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.0/video4linux/video0
19/05 18:51:42,203 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video1 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.0/video4linux/video1
19/05 18:51:42,204 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video2 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.0/video4linux/video2
19/05 18:51:42,206 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video3 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.0/video4linux/video3
19/05 18:51:42,207 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video4 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.3/video4linux/video4
19/05 18:51:42,208 INFO [548222996800] (backend-v4l2.cpp:753) Enumerating UVC video5 realpath=/sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb2/2-1/2-1:1.3/video4linux/video5
19/05 18:51:42,221 INFO [548222996800] (context.cpp:128) Found 0 RealSense devices (0xff requested & 0xff from device-mask in settings)

MartyG-RealSense · 2024-05-19T13:16:43Z

MartyG-RealSense
May 19, 2024
Collaborator

Which method did you use to install 2.55.1, please?

Did you remove the previous installation of the SDK before updating to the current one?

1 reply

2317-2317 May 20, 2024
Author

I used the following command
“cd ~
git clone https://github.com/IntelRealSense/librealsense.git”
I have tried too many times and my thoughts are a bit confused. I want to delete all the previously installed ones and reinstall them. Please tell me how to delete them.
Is there a reliable tutorial? I have referred to several tutorials, and their steps are not quite the same.I have referred to the following link：https://github.com/datasith/Ai_Demos_RPi/wiki/Raspberry-Pi-4-and-Intel-RealSense-D435，Is it mandatory to install protobuf and libtbb dev? I cannot install libtbb dev. In another tutorial, the link is: https://github.com/mathklk/realsense_raspberry_pi4?tab=readme -OV file. It added 4 lines of code in. bashrc, and I cannot determine if they are valid.

MartyG-RealSense · 2024-05-20T09:09:32Z

MartyG-RealSense
May 20, 2024
Collaborator

All package installations of librealsense can be removed with the command below.

dpkg -l | grep "realsense" | cut -d " " -f 3 | xargs sudo dpkg --purge

If you have only used the git clone installation method though then I believe that you would not have multiple versions of librealsense on your computer because the latest installation would overwrite the previous installation.

A RealSense user at #11506 (comment) provided a detailed guide about how they set up librealsense and pyrealsense2 on a Pi 4 with Ubuntu.

0 replies

2317-2317 · 2024-05-20T10:44:24Z

2317-2317
May 20, 2024
Author

I reinstalled the sdk, the realsense viewer could connect to the camera, I tried running the terminal, and it was the same

…

---- Replied Message ---- | From | ***@***.***> | | Date | 05/20/2024 17:09 | | To | ***@***.***> | | Cc | ***@***.***>***@***.***> | | Subject | Re: [IntelRealSense/librealsense] In Raspberry Pi 4B，I can use realsense viewer to view the camera, but I cannot call the camera through Python programs, (Discussion #12937) | All package installations of librealsense can be removed with the command below. dpkg -l | grep "realsense" | cut -d " " -f 3 | xargs sudo dpkg --purge If you have only used the git clone installation method though then I believe that you would not have multiple versions of librealsense on your computer because the latest installation would overwrite the previous installation. A RealSense user at #11506 (comment) provided a detailed guide about how they set up librealsense and pyrealsense2 on a Pi 4 with Ubuntu. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

0 replies

2317-2317 · 2024-05-20T10:58:56Z

2317-2317
May 20, 2024
Author

Run in the terminal and cannot connect to the camera

…

---- Replied Message ---- | From | ***@***.***> | | Date | 05/20/2024 17:09 | | To | ***@***.***> | | Cc | ***@***.***>***@***.***> | | Subject | Re: [IntelRealSense/librealsense] In Raspberry Pi 4B，I can use realsense viewer to view the camera, but I cannot call the camera through Python programs, (Discussion #12937) | All package installations of librealsense can be removed with the command below. dpkg -l | grep "realsense" | cut -d " " -f 3 | xargs sudo dpkg --purge If you have only used the git clone installation method though then I believe that you would not have multiple versions of librealsense on your computer because the latest installation would overwrite the previous installation. A RealSense user at #11506 (comment) provided a detailed guide about how they set up librealsense and pyrealsense2 on a Pi 4 with Ubuntu. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

0 replies

MartyG-RealSense · 2024-05-20T12:54:49Z

MartyG-RealSense
May 20, 2024
Collaborator

Which method are you using to install the pyrealsense2 wrapper?

0 replies

2317-2317 · 2024-05-20T13:29:59Z

2317-2317
May 20, 2024
Author

cd ~/librealsense/build # for python3 cmake .. -DBUILD_PYTHON_BINDINGS=bool:true -DPYTHON_EXECUTABLE=$(which python3) make -j1 sudo make install # add python path vim ~/.zshrc export PYTHONPATH=$PYTHONPATH:/usr/local/lib source ~/.zshrc | | 15677320737 | | ***@***.*** | ---- Replied Message ---- | From | ***@***.***> | | Date | 5/20/2024 20:55 | | To | ***@***.***> | | Cc | ***@***.***>, ***@***.***> | | Subject | Re: [IntelRealSense/librealsense] In Raspberry Pi 4B，I can use realsense viewer to view the camera, but I cannot call the camera through Python programs, (Discussion #12937) | Which method are you using to install the pyrealsense2 wrapper? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

0 replies

MartyG-RealSense · 2024-05-20T14:31:36Z

MartyG-RealSense
May 20, 2024
Collaborator

Your installation procedure looks fine, though I would recommend using the CMake build command below so that the tools and examples, including the RealSense Viewer, are built in addition to the librealsense SDK.

cmake ../ -DFORCE_RSUSB_BACKEND=true -DCMAKE_BUILD_TYPE=release -DBUILD_EXAMPLES=true -DBUILD_GRAPHICAL_EXAMPLES=true -DBUILD_PYTHON_BINDINGS=bool:true -DPYTHON_EXECUTABLE=$(which python3)

2 replies

2317-2317 May 21, 2024
Author

Is this step necessary?
“cmake ../ -DFORCE_RSUSB_BACKEND=true”
Is it feasible for me to use the following code：
“-DFORCE_LIBUVC=ON”

2317-2317 May 21, 2024
Author

When I run ：sudo aptupdate
There are the following errors：
E: Unable to download http://realsense-hw-public.s3.amazonaws.com/Debian/apt-repo/dists/focal/InRelease 403 Forbidden [IP: 52.218.96.169 80]
My Raspberry Pi runs on a system called
PRETTY-NAME="Debian GNU/Linux 11 (bulleteye)"
NAME="Debian GNU/Linux"
VERSIONID="11"
VERSION="11 (bulleteye)"
VERSION-CODENAME=bulleteye
ID=debian
HOMP_URL=“ https://www.debian.org/ “
SUBORTURL=“ https://www.debian.org/support “
BUG_1EPORTURL=“ https://bugs.debian.org/

2317-2317 · 2024-05-21T07:25:01Z

2317-2317
May 21, 2024
Author

When I run the code: echo "deb [signed by=/etc/opt/keyrings/librealsense. pgp] https://librealsense.intel.com/Debian/apt-repo Lsd_release - cs main "|
Sudo tee/etc/opt/sources. list. d/librealsense. list
Sudo apt-get update
Display: Unable to verify the following signature due to lack of public key: NO-PUBKEY C8B3A55A6F3EFCDE

0 replies

MartyG-RealSense · 2024-05-21T08:57:11Z

MartyG-RealSense
May 21, 2024
Collaborator

-DFORCE_RSUSB_BACKEND=true is the successor to -DFORCE_LIBUVC=ON but the older command still works. It is okay to use either of them, as both commands will have the same effect.

It is not necessary to use these commands (which avoid the need for a patch to be applied to the kernel) but it is recommended to use it on Raspberry Pi boards, as it gives a better chance of a successful installation of the librealsense SDK.

Using the sudo apt update package installation method is not suitable for Raspberry Pi as librealsense's Debian packages are designed for use on computers / computing devices with an x86 / x64 chip architecture (like desktop and laptop PCs), whilst Raspberry Pi boards use Arm architecture. The only Arm board that librealsense has special packages for is Nvidia Jetson. Building the SDK from source code should be used on Pi.

0 replies

2317-2317 · 2024-05-22T06:30:35Z

2317-2317
May 22, 2024
Author

What command should I run in the terminal to build a librealsense from the source code | | 15677320737 | | ***@***.*** | ---- Replied Message ---- | From | ***@***.***> | | Date | 5/21/2024 16:57 | | To | ***@***.***> | | Cc | ***@***.***>, ***@***.***> | | Subject | Re: [IntelRealSense/librealsense] In Raspberry Pi 4B，I can use realsense viewer to view the camera, but I cannot call the camera through Python programs, (Discussion #12937) |

…

-DFORCE_RSUSB_BACKEND=true is the successor to -DFORCE_LIBUVC=ON but the older command still works. It is okay to use either of them, as both commands will have the same effect. It is not necessary to use these commands (which avoid the need for a patch to be applied to the kernel) but it is recommended to use it on Raspberry Pi boards, as it gives a better chance of a successful installation of the librealsense SDK. Using the sudo apt update package installation method is not suitable for Raspberry Pi as librealsense's Debian packages are designed for use on computers / computing devices with an x86 / x64 chip architecture (like desktop and laptop PCs), whilst Raspberry Pi boards use Arm architecture. The only Arm board that librealsense has special packages for is Nvidia Jetson. Building the SDK from source code should be used on Pi. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

0 replies

MartyG-RealSense · 2024-05-22T06:38:29Z

MartyG-RealSense
May 22, 2024
Collaborator

A simple way to build from source on Pi is to run a libuvc build script provided by Intel at the link below.

https://github.com/IntelRealSense/librealsense/blob/master/doc/libuvc_installation.md

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In Raspberry Pi 4B，I can use realsense viewer to view the camera, but I cannot call the camera through Python programs, #12937

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