Home Assistant Network Scanner Integration

This Home Assistant integration provides a network scanner that identifies all devices on your local network. Utilizing the provided IP range and MAC address mappings, it gives each identified device a user-friendly name and manufacturer information.

Features

• Scans the local network based on a user-defined IP range.
• Uses user-provided MAC address-to-device mapping for easy identification.
• Supports multiple IP ranges from different subnets.
• Automatically updates the list of devices on a periodic basis.
• Displays the total number of devices currently identified on the network.

Installation through HACS

To install the network_scanner integration using HACS:

1. Open Home Assistant, go to HACS > Integrations.
2. Search for Network Scanner and install it.
3. After installation, add the necessary configuration to your configuration.yaml (see below).
4. Restart Home Assistant.

Manual Installation

To install this integration manually:

1. Copy the network_scanner directory into the custom_components directory of your Home Assistant installation.
2. Add the configuration to your configuration.yaml.
3. Restart Home Assistant.

Configuration

Option 1: Through Home Assistant UI

1. Navigate to Configuration > Integrations.
2. Click the + Add Integration button.
3. Search for Network Scanner and select it.
4. Enter the desired IP range for the network scan, e.g., 192.168.1.1-254 or use the CIDR notation like 192.168.1.0/24.
5. Optionally, provide MAC address to device mapping in the format in configuration.yaml:
   • MAC address (e.g., bc:14:14:f1:81:1b)
   • Friendly name (e.g., Brother Printer)
   • Manufacturer (e.g., Cloud Network Technology Singapore Pte. Ltd.)
6. Separate each field with a semi-colon and each mapping entry with a newline.

Example of entries in the config flow input fields:

bc:14:14:f1:81:1b;Brother Printer;Cloud Network Technology Singapore Pte. Ltd.
b1:81:11:31:a1:b1;My iPhone;Apple Inc.

Option 2: Manually via configuration.yaml

You can configure the integration directly in configuration.yaml for more control, especially if adding multiple IP ranges and custom MAC mappings.

Example Configuration:

network_scanner:
  ip_range: "10.100.1.0/24 10.1.1.0/24"
  mac_mapping_1: "bc:14:14:f1:81:1b;Brother Printer;Cloud Network Technology Singapore Pte. Ltd."
  mac_mapping_2: "b1:81:11:31:a1:b1;My iPhone;Apple Inc."

Displaying Devices in the UI using Markdown Card

To visualize the devices detected by the Network Scanner in the Home Assistant interface, you can add a Lovelace Markdown card with the following configuration:

type: markdown
content: >
  ## Devices

  | IP Address | MAC Address | Custom Name | Custom Description | Hostname | Vendor |
  |------------|-------------|-------------|--------------------|----------|--------|

  {% for device in state_attr('sensor.network_scanner', 'devices') %}
  | {{ device.ip }} | {{ device.mac }} | {{ device.name }} | {{ device.type }} | {{ device.hostname }} | {{ device.vendor }} |
  {% endfor %}

This card will display a table with the IP Address, MAC Address, Custom Name, Hostname, and Vendor of each device that has been scanned on your network. Name and Type are custom mapping provided by the user.

Displaying Devices in the UI using Flex Table

Thanks to @gridlockjoe, you can also display using the Flex Table as such:

type: custom:flex-table-card
title: Devices
entities:
  include: sensor.network_scanner
sort_by: x.ip+
columns:
  - name: IP Address
    data: devices
    modify: x.ip
  - name: MAC Address
    data: devices
    modify: x.mac
  - name: Custom Name
    data: devices
    modify: x.name
  - name: Custom Description
    data: devices
    modify: x.type
  - name: Hostname
    data: devices
    modify: x.hostname
  - name: Vendor
    data: devices
    modify: x.vendor

Technical Details

The integration is composed of several Python scripts that manage the setup and updating of the network sensor:

• config_flow.py: Handles the user interface for configuration.
• const.py: Contains constants used by the integration.
• __init__.py: Sets up and unloads the integration components.
• sensor.py: Defines the Network Scanner sensor, including methods for scanning the network and parsing the MAC address mapping.

The network scan is performed every 15 minutes by default, and the results are logged for debugging purposes. The nmap library is used to scan the network, and the async_setup_entry function in sensor.py initializes the sensor with the IP range and MAC mappings specified in the configuration.

Troubleshooting

If you encounter any issues:

• Check the Home Assistant logs for errors related to the network scanner.
• Ensure that the IP range and MAC address mappings are correctly formatted.
• Verify that nmap is installed and accessible to the Home Assistant environment.

Contributing

Contributions to this integration are welcome. Please refer to the project's GitHub repository for contributing guidelines.