How to use the pyrealsense2.camera_info function in pyrealsense2

if __name__ == '__main__':

    chessBoard_num = 4

    resolution_width = 1280 # pixels
    resolution_height = 720 # pixels
    frame_rate = 15  # fps

    align = rs.align(rs.stream.color)
    rs_config = rs.config()
    rs_config.enable_stream(rs.stream.depth, resolution_width, resolution_height, rs.format.z16, frame_rate)
    rs_config.enable_stream(rs.stream.color, resolution_width, resolution_height, rs.format.bgr8, frame_rate)

    connect_device = []
    for d in rs.context().devices:
        if d.get_info(rs.camera_info.name).lower() != 'platform camera':
            connect_device.append(d.get_info(rs.camera_info.serial_number))

    if len(connect_device) < 2:
        print('Registrition needs two camera connected.But got one.')
        exit()
    
    pipeline1 = rs.pipeline()
    rs_config.enable_device(connect_device[0])
    pipeline_profile1 = pipeline1.start(rs_config)

    intr1 = pipeline_profile1.get_stream(rs.stream.color).as_video_stream_profile().get_intrinsics()
    pinhole_camera1_intrinsic = o3d.camera.PinholeCameraIntrinsic(intr1.width, intr1.height, intr1.fx, intr1.fy, intr1.ppx, intr1.ppy)
    cam1 = rgbdTools.Camera(intr1.fx, intr1.fy, intr1.ppx, intr1.ppy)
    # print('cam1 intrinsics:')
    # print(intr1.width, intr1.height, intr1.fx, intr1.fy, intr1.ppx, intr1.ppy)

def find_device_that_supports_advanced_mode() :
    ctx = rs.context()
    ds5_dev = rs.device()
    devices = ctx.query_devices();
    for dev in devices:
        if dev.supports(rs.camera_info.product_id) and str(dev.get_info(rs.camera_info.product_id)) in DS5_product_ids:
            if dev.supports(rs.camera_info.name):
                print("Found device that supports advanced mode:", dev.get_info(rs.camera_info.name))
            return dev
    raise Exception("No device that supports advanced mode was found")

found_dev = True
            break
    if not found_dev:
        print('No RealSense device found' + str('.' if len(serial_no) == 0 else ' with serial number: '+serial_no))
        return 0

    # set to advance mode:
    advanced = rs.rs400_advanced_mode(dev)
    if not advanced.is_enabled():
        advanced.toggle_advanced_mode(True)

    # print(a few basic information about the device)
    print('  Device PID: ',  dev.get_info(rs.camera_info.product_id))
    print('  Device name: ',  dev.get_info(rs.camera_info.name))
    print('  Serial number: ',  dev.get_info(rs.camera_info.serial_number))
    print('  Firmware version: ',  dev.get_info(rs.camera_info.firmware_version))
    debug = rs.debug_protocol(dev)
    return debug

found_dev = False
    for dev in devices:
        if len(serial_no) == 0 or serial_no == dev.get_info(rs.camera_info.serial_number):
            found_dev = True
            break
    if not found_dev:
        print('No RealSense device found' + str('.' if len(serial_no) == 0 else ' with serial number: '+serial_no))
        return 0

    # set to advance mode:
    advanced = rs.rs400_advanced_mode(dev)
    if not advanced.is_enabled():
        advanced.toggle_advanced_mode(True)

    # print(a few basic information about the device)
    print('  Device PID: ',  dev.get_info(rs.camera_info.product_id))
    print('  Device name: ',  dev.get_info(rs.camera_info.name))
    print('  Serial number: ',  dev.get_info(rs.camera_info.serial_number))
    print('  Firmware version: ',  dev.get_info(rs.camera_info.firmware_version))
    debug = rs.debug_protocol(dev)
    return debug

def get_debug_device(serial_no):
    ctx = rs.context()
    devices = ctx.query_devices()
    found_dev = False
    for dev in devices:
        if len(serial_no) == 0 or serial_no == dev.get_info(rs.camera_info.serial_number):
            found_dev = True
            break
    if not found_dev:
        print('No RealSense device found' + str('.' if len(serial_no) == 0 else ' with serial number: '+serial_no))
        return 0

    # set to advance mode:
    advanced = rs.rs400_advanced_mode(dev)
    if not advanced.is_enabled():
        advanced.toggle_advanced_mode(True)

    # print(a few basic information about the device)
    print('  Device PID: ',  dev.get_info(rs.camera_info.product_id))
    print('  Device name: ',  dev.get_info(rs.camera_info.name))
    print('  Serial number: ',  dev.get_info(rs.camera_info.serial_number))
    print('  Firmware version: ',  dev.get_info(rs.camera_info.firmware_version))

for dev in devices:
        if len(serial_no) == 0 or serial_no == dev.get_info(rs.camera_info.serial_number):
            found_dev = True
            break
    if not found_dev:
        print('No RealSense device found' + str('.' if len(serial_no) == 0 else ' with serial number: '+serial_no))
        return 0

    # set to advance mode:
    advanced = rs.rs400_advanced_mode(dev)
    if not advanced.is_enabled():
        advanced.toggle_advanced_mode(True)

    # print(a few basic information about the device)
    print('  Device PID: ',  dev.get_info(rs.camera_info.product_id))
    print('  Device name: ',  dev.get_info(rs.camera_info.name))
    print('  Serial number: ',  dev.get_info(rs.camera_info.serial_number))
    print('  Firmware version: ',  dev.get_info(rs.camera_info.firmware_version))
    debug = rs.debug_protocol(dev)
    return debug

def find_device_that_supports_advanced_mode() :
    ctx = rs.context()
    ds5_dev = rs.device()
    devices = ctx.query_devices();
    for dev in devices:
        if dev.supports(rs.camera_info.product_id) and str(dev.get_info(rs.camera_info.product_id)) in DS5_product_ids:
            if dev.supports(rs.camera_info.name):
                print("INFO: Found device that supports advanced mode:", dev.get_info(rs.camera_info.name))
            return dev
    raise Exception("No device that supports advanced mode was found")

def find_device_that_supports_advanced_mode() :
    ctx = rs.context()
    ds5_dev = rs.device()
    devices = ctx.query_devices();
    for dev in devices:
        if dev.supports(rs.camera_info.product_id) and str(dev.get_info(rs.camera_info.product_id)) in DS5_product_ids:
            if dev.supports(rs.camera_info.name):
                print("Found device that supports advanced mode:", dev.get_info(rs.camera_info.name))
            return dev
    raise Exception("No device that supports advanced mode was found")

def find_device_that_supports_advanced_mode() :
    ctx = rs.context()
    ds5_dev = rs.device()
    devices = ctx.query_devices();
    for dev in devices:
        if dev.supports(rs.camera_info.product_id) and str(dev.get_info(rs.camera_info.product_id)) in DS5_product_ids:
            if dev.supports(rs.camera_info.name):
                print("INFO: Found device that supports advanced mode:", dev.get_info(rs.camera_info.name))
            return dev
    raise Exception("No device that supports advanced mode was found")