can't connect to Oak D W camera OV9782

alan

Hello, I'm tyring to use Oak D W OV9782 with **[depthai_blazepose ](https://github.com/geaxgx/depthai_blazepose)**however i'm not able to connect the camera to it and i'm getting the following error:

here is the repo: https://github.com/geaxgx/depthai_blazepose
Traceback (most recent call last):

File "demo.py", line 46, in <module>

tracker = BlazeposeDepthai(input_src=args.input,

File "/home/skywalker/test_pose/depthai_blazepose/BlazeposeDepthai.py", line 94, in init

self.device = dai.Device()

RuntimeError: Failed to find device after booting, error message: X_LINK_DEVICE_NOT_FOUND

I have tried to solve the issue and i followed the debugging steps from luxonis website for connectivity issues and i still couldn't solve the problem:
https://docs.luxonis.com/en/latest/pages/support/

I'm using usb3 cable and i set the udev rules as adviced in the website.

jakaskerl

Hi alan
Do other examples work for you: do depthai_demo and camtest work as expected? Still I'd recommend testing out multiple usb cables in case this one is damaged.

Thanks,
Jaka

alan

So I tried multiple things, I'm going to list them:

1) I have two cameras, One is the Oak-D IMX378 camera and the other is Oak-D OV9782. When i run the IMX378 camera, the demo.py file works and run fine. However when I connect the OV9782 camera i get the error above.

2) I tried to run depthai_demo.py from the depthai repo: https://github.com/luxonis/depthai
and similar thing happen where IMX378 works but the OV9782 does not. However i was able to fix this issue by changing the following line in the depthai_demo.py, line 209:
self.device = dai.Device(self.pm.pipeline.getOpenVINOVersion(), self.deviceInfo, usb2Mode=self.conf.args.usbSpeed == "usb2")

i change it to the following where i changed the "usb2" to "usb3"
self.device = dai.Device(self.pm.pipeline.getOpenVINOVersion(), self.deviceInfo, usb2Mode=self.conf.args.usbSpeed == "usb3")

I don't know what to do in depthai_blazepose as it doesn't have this line and i couldn't find anything to change there.

I don't think its the cable because the computer is able to find the camera when i do lsusb and i'm able to run the camera as i discribed above in a different example after changing the line

jakaskerl

Hi alan
Could you please check the usb speed of the booted device?
Simply add print(device.getUsbSpeed()) after the with dai.device.
I think you are essentially enabling the usb2 mode by changing the usb2 to usb3.

Thanks,
Jaka

alan

Hi
I added this line print(device.getUsbSpeed()) afterline in the depthai_demo.py, line 209:
self.device = dai.Device(self.pm.pipeline.getOpenVINOVersion(), self.deviceInfo, usb2Mode=self.conf.args.usbSpeed == "usb3") and I got the following results:
UsbSpeed.HIGH

If i don't change from usb2 to usb3 and keep the line the same: self.device = dai.Device(self.pm.pipeline.getOpenVINOVersion(), self.deviceInfo, usb2Mode=self.conf.args.usbSpeed == "usb2") I got the following error and it doesnt find the camera:

Depthai version installed: 2.21.2.0

Setting up demo...

Available devices:

[0] 1844301021AEA90F00 [X_LINK_UNBOOTED]

File "depthai_demo.py", line 661, in run

self.instance.run_all(self.conf)

File "depthai_demo.py", line 132, in run_all

self.setup(conf)

File "depthai_demo.py", line 209, in setup

self._device = dai.Device(self._pm.pipeline.getOpenVINOVersion(), self._deviceInfo, usb2Mode=self._conf.args.usbSpeed == "usb2")

RuntimeError: Failed to find device after booting, error message: X_LINK_DEVICE_NOT_FOUND

jakaskerl

Hi alan
USB speed "HIGH" signifies speeds for USB2. The USB3 should read "SUPER". I think there might be a problem with the cable or the port you are using.

Also please try this:

#!/usr/bin/env python3

import cv2
import depthai as dai

# Create pipeline
pipeline = dai.Pipeline()

# Define source and output
camRgb = pipeline.create(dai.node.ColorCamera)
xoutRgb = pipeline.create(dai.node.XLinkOut)

xoutRgb.setStreamName("rgb")

# Properties
camRgb.setPreviewSize(300, 300)
camRgb.setInterleaved(False)
camRgb.setColorOrder(dai.ColorCameraProperties.ColorOrder.RGB)

# Linking
camRgb.preview.link(xoutRgb.input)

# Connect to device and start pipeline
with dai.Device(pipeline) as device:

    print('Connected cameras:', device.getConnectedCameraFeatures())
    # Print out usb speed
    print('Usb speed:', device.getUsbSpeed().name)
    # Bootloader version
    if device.getBootloaderVersion() is not None:
        print('Bootloader version:', device.getBootloaderVersion())
    # Device name
    print('Device name:', device.getDeviceName(), ' Product name:', device.getProductName())

    # Output queue will be used to get the rgb frames from the output defined above
    qRgb = device.getOutputQueue(name="rgb", maxSize=4, blocking=False)

    while True:
        inRgb = qRgb.get()  # blocking call, will wait until a new data has arrived

        # Retrieve 'bgr' (opencv format) frame
        cv2.imshow("rgb", inRgb.getCvFrame())

        if cv2.waitKey(1) == ord('q'):
            break

Thanks,
Jaka