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PEAK_DETECT_AVAILABLE_DEVICES

Detects available PCAN devices and returns a string containing the device name and the channel number. This blocks is use to detect available PCAN devices and returns a string containing the device name and the channel number. โ†’ Use the channel number to configure to connect to PEAK can hardware and other devices that support the PCAN interface using the PCAN_CONNECT block. For Windows and Linux compatibilities, the following Drviers are required: โ†’ https://www.peak-system.com/Drivers.523.0.html?&L=1 For MacOS compatibilities, the following Drivers are required: โ†’ https://mac-can.github.io/ Params: None : Returns: out : String A string containing the device name and the channel number.
Python Code
from flojoy import flojoy, String, DataContainer
import can
from typing import Optional


@flojoy(deps={"python-can": "4.3.1", "uptime": "3.0.1"})
def PEAK_DETECT_AVAILABLE_DEVICES(default: Optional[DataContainer]) -> String:
    """Detects available PCAN devices and returns a string containing the device name and the channel number.

    This blocks is use to detect available PCAN devices and returns a string containing the device name and the channel number.
    โ†’ Use the channel number to configure to connect to PEAK can hardware and other devices that support the PCAN interface using the PCAN_CONNECT block.

    For Windows and Linux compatibilities, the following Drviers are required:
        โ†’ https://www.peak-system.com/Drivers.523.0.html?&L=1
    For MacOS compatibilities, the following Drivers are required:
        โ†’ https://mac-can.github.io/

    Parameters
    ----------
    None

    Returns
    -------
    String
        A string containing the device name and the channel number.
    """
    available_channels = can.detect_available_configs("pcan")

    str_builder = ""
    for channel in available_channels:
        str_builder += f"{channel['device_name']}: {channel['channel']}\n"

    if str_builder == "":
        raise Exception(
            "No device available detected. Please make sure that the PCAN drivers are installed."
        )

    return String(str_builder)

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Example

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React Flow mini map

This application demonstrates how to use multiple CAN blocks to connect to a PEAK-USB device and read messages from it. The PEAK-USB device is a USB-to-CAN interface that enables you to connect a computer to a CAN network. This device is used in this case to capture the messages of a particular sensor by filtering them directly at the kernel level, thus reducing the load on the CPU, and save those messages to a log file locally.

Once the app is done, the generated logs are exported to an S3 bucket to keep a record of the sensorโ€™s data for further analysis.

To replicate this application, you must connect the PEAK-USB to your computer and install the required driver (refer to the PEAK_CONNECT blocks for more information on the necessary driver for your platform). Then, simply specify the PEAK-USB channel in the required blocks, and this Flojoy application will log the messages received by the device!

Detecting channels A valuable block is the PEAK_DETECT_AVAILABLE_DEVICE. This block allows you to display the devices using the PCAN interface that are connected to your computer.