How to update outdated OAK-D Pro PoE firmware

Hey @jakaskerl, thanks for being patient with this

To give you a better overview of how our camera / architecture is setup, here is a diagram

Our server is connected to the cameras via two switches, one switch has all 1000mbps ports fully utilized by the Oak Cameras, it extends to another switch via 1000Base SFP module, the other switch is also rated for 1000Mbps

See details of both switches here:

• Main network switch: https://www.volktek.com/productdetail_en.php?id=110

• Unmanaged switch: https://www.volktek.com/productdetail_en.php?id=82

The power should be sufficient according to the calculations that we did.

As mentioned we are only actually using 13 cameras actively but the rest will still be consuming power, just not in use as it is not connected to. ( we may try to disconnect them and see if it improves the situation)

This issue only appears on boot and seems to happen more when we connect to 10 or more cameras simultaneously. Usually one or two cameras will have their ping missed.

However, in the off chance that all cameras successfully connect and boot the pipeline, the cameras are able to run for few days non-stop without interruption.

Here are some crash logs. I'd love to update files, but somehow the forum doesn't allow a json not zip file attachment

Crash Dump 1

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An update, we’re still facing some issues with the cameras having connection issues, and dropped frames from the videos. 

Here are some of the things we’ve tried to reduce the bandwidth saturation:

1. Disconnecting the backup cameras (13) from the main switch (24 port), this is ensure that the connected backup cameras aren’t saturating the bandwidth from the active cameras (11)

2. Have a direct connection between the GPU server & the main switch (24 port) instead of going through the 5 port switch. This is to reduce the bandwidth saturation on the 5 port switch as it’s used to connect between the main switch & our file server

However, upon booting our application the camera ping isn’t resolved. Out of the 13 cameras, only 7 ~ 10 cameras managed to successfully start. So for now we’ve updated our configuration on only support 10 and it seems to work but we’d still need to restart a few times before the cameras manages to connect.

We’d like to schedule a call with  @jakaskerl & @erik to share more details in order to better troubleshoot we’re facing, let us know what’s required to make this happen.

Hey @erik, thanks for the prompt reply.

I want to clarify does MRE mean Minimum Reproducible Example? If so, I'd have to discuss with my colleague on how to come up with one.

Additionally, the call I've mentioned isn't to perform a live debugging on our system rather it's us providing you guys a more comprehensive overview of our architecture and specs of our server, network switches etc.

We're hoping that with a much more complete overview it's much easier to point out any potential setup or flaws in our system

Hey @erik @jakaskerl ,

Some updates on our end.

Currently, we are actively using 13 cameras and we’re still facing the issue of ping was missed at two points of our docker application:

1. When we are starting our docker application.

2. In the middle of the week

   1. As our solution is deployed on prem, we check on it every week. During our checks we discovered that a few cameras had ping was missed which cause our docker application to hang

   2. 

   3. As an example, we started our docker service at 07/10/2024 and the ping was missed showed up at 09/10/2024 causing our service to hang

Here are some troubleshooting steps we’ve tried:

We’ve used a few scripts from your repository for us to obtain some metrics, this enabled us to benchmark against the desired result shown below:

Benchmark

Scripts

Poe Link test result

Here’s a sample result of a few cameras

# Cam 1
Connecting to  10.0.0.11 ...
mxid: 184430101110E8F400 (OK)
speed: 1000 (OK)
full duplex: 1 (OK)
boot mode: 3 (OK)

# Cam 3
Connecting to  10.0.0.13 ...
mxid: 18443010F16EE6F400 (OK)
speed: 1000 (OK)
full duplex: 1 (OK)
boot mode: 3 (OK)

# Cam 6
Connecting to  10.0.0.16 ...
mxid: 18443010517BE7F400 (OK)
speed: 1000 (OK)
full duplex: 1 (OK)
boot mode: 3 (OK)

As seen, our link test managed to hit the benchmark which requires a speed of 1000 Mbps

OAK bandwidth test result

Here’s a sample result of a few camera:

# Cam 1
Downlink 883.4 mbps
Uplink 219.4 mbps

# Cam 3
Downlink 890.0 mbps
Uplink 218.3 mbps

# Cam 6
Downlink 890.6 mbps
Uplink 218.4 mbps

As seen, our downlink and uplink are within the acceptable range of 800 Mbps uplink & 200 Mbps downlink

OAK Latency test

Here’s a sample result of a few cameras:

# Cam 1
Average latency 2.48 ms, Std: 0.4

# Cam 3
Average latency 2.73 ms, Std: 0.3

# Cam 6
Average latency 3.06 ms, Std: 0.3

As seen, our average latency across the camera is less than 10ms which is required to pass the benchmark

After running the test, we can conclude that we’re not limited by our network equipment as the resulting latency, bandwidth and link speed are within the benchmark range stated above.

Additionally, we can confirm that enough power is supplied to the cameras based on the following

As seen from the image, each port can deliver up to 30W to the cameras and each of it is only consuming up to 4~5W which is sufficient for the cameras to function

CPU Usage of cameras

To ensure that our pipeline isn’t too complex which can cause a high CPU usage of the LeonOS and potentially lead to a ping was missed error, we’ve enabled logging on our setup through DEPTHAI_LEVEL=info to observe the CPU usage.

The result shows that our pipeline is only consuming up to 12% of the CPU . Proving that our pipeline isn’t complex enough to cause a high CPU usage.

Allowing longer boot time for the cameras

On the debugging guide, a section indicates that some network equipment might not work well with the default timeout they’ve set.

To ensure that there’s enough time for the camera to boot & the watchdog doesn’t disconnect too early, we’ve introduced two environment variables:

• DEPTHAI_BOOTUP_TIMEOUT

• DEPTHAI_WATCHDOG_INITIAL_DELAY

And set it’s value to 60000 (60s), allowing more time for camera to ping the server.

However, this didn’t work as ping was missed error still occured upon boot

Additional Context

Based on our above troubleshooting steps, we’re still facing the ping was missed issue. Hence, we’re providing our hardware architecture to provide a better overview of our setup

Lastly, here’s a Minimal Reproducible Example (MRE) that you guys can run on your end to simulate our environment:

import os
import re
import cv2
import math
import time
import yaml
import numpy as np
import socket
#os.environ["DEPTHAI_LEVEL"] = "debug"
import depthai as dai
from collections import deque
from threading import Thread
from datetime import datetime, timedelta
from loguru import logger
from typing import List, Any
from pydantic import BaseModel



class Frame(BaseModel):
    has_rgb: bool
    has_depth: bool
    rgb_frame: Any = None
    depth_frame: Any = None
    timestamp: timedelta 

class OakDProPOE(Thread):

    def __init__(
        self,
        buffer: deque,
        mxid: str,
        server_ip: str,
        server_port: int,
        fps: int = 30,
    ):
        super().__init__()
        self.fps = fps
        self.buffer = buffer
        self.recording = False
        self.ip = server_ip
        self.port = server_port
        self.mxid = mxid
        self.info = self.lookup_camera(mxid)
        self.recording = False
        self.connection: socket.socket = None

    def lookup_camera(self, mxid: str):

        for i in range(3):
            ret, info = dai.Device.getDeviceByMxId(mxid)
            if ret:
                self.mxid = mxid
                return info
        else:
            raise Exception(f"{mxid} not found!")
        
    def start_camera(self):

        self.recording = True

    def stop_camera(self):

        if self.connection:
            self.connection.close()
        self.recording = False

    def poe_pipeline(self):

        logger.info(f"{self.mxid} pipeline initiated")
        pipeline = dai.Pipeline()

        camRgb = pipeline.createColorCamera()
        camRgb.setIspScale(2,3)

        videoEnc = pipeline.create(dai.node.VideoEncoder)
        videoEnc.setDefaultProfilePreset(30, dai.VideoEncoderProperties.Profile.MJPEG)
        camRgb.video.link(videoEnc.input)

        script = pipeline.create(dai.node.Script)
        script.setProcessor(dai.ProcessorType.LEON_CSS)
        videoEnc.bitstream.link(script.inputs['frame'])

        script.setScript(
            f"""
HOST_IP = '{self.ip}'
HOST_PORT = {self.port}
                 
import socket
import time

node.warn(f'>Going to connect to {{HOST_IP}}:{{HOST_PORT}}<')
sock = socket.socket()
sock.connect((HOST_IP, HOST_PORT))

while True:

    pck = node.io["frame"].get()
    data = pck.getData()
    ts = pck.getTimestamp()
    header = f"ABCDE " + str(ts.total_seconds()).ljust(18) + str(len(data)).ljust(8)
    sock.send(bytes(header, encoding='ascii'))
    sock.send(data)
"""
        )
        logger.info(self.mxid)
        device_info = dai.DeviceInfo(self.mxid)
        logger.info(device_info)

        try:

            with dai.Device(pipeline, device_info) as device:
                logger.info(f"Pipeline running on {self.mxid}")
                while True:
                    time.sleep(1)

        except Exception as e:
            logger.error(e)
            raise

    def run(self):

        def get_frame(socket, size):
            bytes = socket.recv(4096)
            while True:
                read = 4096
                if size - len(bytes) < read:
                    read = size - len(bytes)
                bytes += socket.recv(read)
                if size == len(bytes):
                    return bytes

        server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        server.bind(("0.0.0.0", self.port))

        cam_thread = Thread(target=self.poe_pipeline)
        cam_thread.daemon = True
        logger.info("Pipeline started")

        server.listen()

        logger.info("Starting cam thread")
        cam_thread.start()
        self.connection, client = server.accept()
        try:
            logger.info(f"{self.mxid} connected")
            while self.recording:
                header = str(self.connection.recv(32), encoding="ascii")
                chunks = re.split(" +", header)
                if chunks[0] == "ABCDE":
                    # print(f">{header}<")
                    ts = float(chunks[1])
                    imgSize = int(chunks[2])
                    img = get_frame(self.connection, imgSize)
                    buf = np.frombuffer(img, dtype=np.byte)
                    # print(buf.shape, buf.size)
                    frame = cv2.imdecode(buf, cv2.IMREAD_COLOR)

                    frame = Frame(
                        has_rgb=True,
                        has_depth=True,
                        rgb_frame=cv2.cvtColor(frame, cv2.COLOR_BGR2RGB),
                        depth_frame=None,
                        timestamp=timedelta(seconds=ts),
                    )

                    self.buffer.append(frame)

        except Exception as e:
            # TODO: Handle Server Error
            logger.error(f"{self.mxid}: " + str(e))
            raise

        server.close()


class Controller:


    def __init__(self, yaml_file: str, fps: int, server_ip: str):

        self.fps = fps
        self.sync_threshold = timedelta(milliseconds=math.ceil(5000 / self.fps))
        self.server_ip = server_ip
        self.load_camera_mapping_file(yaml_file)
    
    def load_camera_mapping_file(self, yaml_file):

        logger.info(f"Controller reading yaml file: {yaml_file}")
        with open(yaml_file) as f:
            self.camera_mapping = yaml.load(f, Loader=yaml.FullLoader)

        # Display the yaml config
        logger.info(
            yaml.dump(self.camera_mapping, default_flow_style=False, sort_keys=False)
        )

        camera_type = self.camera_mapping["CameraType"]

        self.active_cameras = {}
        for cam in self.camera_mapping["ActiveCameras"]:
            # Create a buffer for the camera
            buffer = deque([], maxlen=self.fps * 50) # buffer holds up to 10 seconds worth of frames
            main_camera_key = cam["main_camera"]["camera_id"]

            if camera_type == "OakDProPoE":
                main_camera = OakDProPOE(
                    fps=self.fps,
                    buffer=buffer,
                    mxid=cam["main_camera"]["mxid"],
                    server_ip=self.server_ip,
                    server_port=cam["main_camera"]["server_port"],
                )


            else:
                raise Exception(f"Camera type {camera_type} is invalid!")
            
            self.active_cameras[main_camera_key] = {
                "buffer": buffer,
                "synced_buffer": deque([], maxlen=500),
                "main_camera": main_camera,
            }

    def get_active_cameras(self):

        return self.active_cameras

    def start_cameras(self):

        for cam_idx in self.active_cameras:
            camera = self.active_cameras[cam_idx]["main_camera"]
            camera.daemon = True
            camera.start_camera()
            camera.start()


        logger.info("Cameras started")

    def stop_cameras(self):

        logger.info("Controller stopping cameras")

        for cam_idx in self.active_cameras:
            camera = self.active_cameras[cam_idx]["main_camera"]

            camera.stop_camera()
            camera.join()

        logger.info("Cameras stopped")

    def check_sync(self, timestamp: timedelta):

        matching_frame_indexes = []
        # Try to find matching frame in each queue
        for active_cam in self.active_cameras.values():
            for i, frame in enumerate(active_cam["synced_buffer"]):
                time_diff = abs(frame.timestamp - timestamp)
                if time_diff <= self.sync_threshold:
                    # We now have the synced frame index for this particular camera
                    matching_frame_indexes.append(i)
                    break

        # When synced frames are found, clear all unused/out-of-sync frames
        if len(matching_frame_indexes) == len(self.active_cameras):

            for i, q in enumerate(self.active_cameras.values()):
                for j in range(0, matching_frame_indexes[i]):
                    q["synced_buffer"].popleft()

            return True

        else:

            return False


    def get_synced_frames(self) -> dict[int, Frame]:

        # Iterate to try and get new frame from any buffer
        start = time.perf_counter()
        for cam in self.active_cameras:

            if self.active_cameras[cam]["buffer"]:
                # Get the frame from camera's buffer to controller's sync buffer
                # this ensures we can synchronously process the frames in sync buffer without worrying about thread safety from the camera buffer
                frame = self.active_cameras[cam]["buffer"].popleft()
                self.active_cameras[cam]["synced_buffer"].append(frame)
                # Check sync to see if we have a group of synchronized frames across all sync buffers
                if self.check_sync(frame.timestamp):

                    data = {}
                    for cam in self.active_cameras:
                        data[cam] = self.active_cameras[cam]["synced_buffer"].popleft()
                    logger.debug(f"Sync took {time.perf_counter() - start} seconds")
                    start = time.perf_counter()
                    return data
                

if __name__ == "__main__":
    
    controller = Controller(
        yaml_file="configs/camera_mapping_office.yaml",
        fps=5,
        server_ip="192.168.1.236"
    )

    controller.start_cameras()

    while True:

        synced_frame = controller.get_synced_frames()

To run the MRE you’d need to install the requirements in from the import statement of the file and have a camera-config.yaml file which reflects the configuration of the cameras.

Here’s how a sample camera camera-config.yaml looks like:

CameraType: OakDProPoE
ActiveCameras:
  - main_camera: 
      camera_id: 25
      mxid: 18443010117CE9F400
      server_port: 10025
    backup:
  - main_camera: 
      camera_id: 26
      mxid: 18443010D1F3E7F400
      server_port: 10026
    backup:
  - main_camera: 
      camera_id: 27
      mxid: 18443010C1D6E1F400
      server_port: 10027
    backup:
  - main_camera: 
      camera_id: 28
      mxid: 19443010C172801300
      server_port: 10028
    backup:

Some notes on the camera-config.yaml

• On the actual file, it should contain the configuration for 13 cameras

• camera_id & backup: is not required

• Each mxid should contain a unique camera mxid

It’d be filled in at line 303 of mre.py:

Here’s how a potential directory structure can look like:

.
└── (some-folder)/
    ├── mre.py
    ├── camera-config.yaml
    └── requirements.txt

Hey @jakaskerl ,

Thanks for the suggestion.

As we've provided an MRE, can you take a look at it and point of any flaws / improvement that we can make (other than implementing a reconnect).

Thanks!

Thanks for the prompt reply @jakaskerl .

Is it possible to save the output logs of **DEPTHAI_LEVEL=info **to a file?