# TODO: increase defaults in depthai! Below is a workaround for this issue on some setups:

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

# If this error is still observed, might be a FW crash on initialization

if 1:

import os

os.environ["DEPTHAI_WATCHDOG_INITIAL_DELAY"] = "40000"

os.environ["DEPTHAI_BOOTUP_TIMEOUT"] = "40000"

import depthai as dai

import threading

import traceback

import time

import os

def worker(devinfo, id):

print(f'[{id}] opening bootloader...')

try:

with dai.DeviceBootloader(devinfo) as bl:

print(f'[{id}] bootloader version: {bl.getVersion()}')

with dai.Device(devinfo) as dev:

print(f'[{id}] device started, name: {dev.getDeviceName()}')

time.sleep(6)

# Exceptions aren't propagated, so simply exit the app with an error

except Exception as e:

print(f'[{id}] FAILED: {e}')

traceback.print_exc()

os._exit(-1)

device_infos = dai.Device.getAllAvailableDevices()

n = len(device_infos)

if n <= 0:

print('No devices found!')

os._exit(-1)

print(f'Found {n} devices, handling each in a thread...')

threads = []

for devinfo in device_infos:

id = devinfo.name # IP address for PoE

t = threading.Thread(target=worker, args=(devinfo, id, ))

t.name += f'-{id}' # Thread name useful for debugging

t.start()

threads.append(t)

for t in threads:

t.join()

print('Multi-threading test succeeded!')