D435i camera device not connected

• MartyX Grover

  • April 12, 2022 07:24
  • Edited

  Hello, are you using a Pynq Z1 board, please?  There was a Pynq Z1 case a few years ago where a RealSense user was attempting to use pyrealsense2 with it on the board's USB 2 port.

  https://support.intelrealsense.com/hc/en-us/community/posts/360033625313-Is-it-possible-to-use-the-PyRealSense2-wrapper-using-a-USB2-0-port-

   

  They resolved their particular problem by calibrating the camera, although their problem was a different one to yours.  The case did demonstrate though that a 400 Series camera can work succesfully on a Pynq Z1 board on USB 2.

   

  Is the camera detected if you use the command below in the Linux terminal, please?

  rs-enumerate-devices

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• 203070060

  • April 14, 2022 04:23

  I am using PYNQ z2 board. I tried that but still I am getting no device connected. Pyrealsense2 module is imported correctecly.

  Any solution to this this?

  I am using the below  code:

  
  import pyrealsense2 as rs

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

      # Configure streams
      config = rs.config()
      config.enable_stream(rs.stream.depth, 640, 480, rs.format.z16, 30)

      # Start streaming
      pipeline.start(config)

      while True:
          # This call waits until a new coherent set of frames is available on a device
          # Calls to get_frame_data(...) and get_frame_timestamp(...) on a device will return stable values until wait_for_frames(...) is called
          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)
      exit(0)

  except Exception as e:
      print(e)
      pass

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• MartyX Grover

  • April 14, 2022 07:30

  Given that you are using a computing device that is not commonly used with librealsense, you may get better results if you build librealsense from source code with CMake using the RSUSB backend method.  This type of librealsense build is not dependent on Linux versions or kernel versions and does not require patching, and so it can be useful on exotic industrial hardware specifications or in situations where there is a conflict with the Linux kernel.

  You can build librealsense and the Python wrapper together at the same time.

  https://support.intelrealsense.com/hc/en-us/community/posts/360048315774/comments/360012181673

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