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A module for MagicMirror which determines the status of devices on the network based on their MAC address.

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MMM-MacAddressScan

A module for MagicMirror which determines the status of devices on the network based on their MAC address. It can also look up devices by IP addresses or hostnames.

This module is an enhanced fork of the excellent MMM-NetworkScanner module by Ian Perrin (http://ianperrin.com).

Table of contents

  1. Technical Overview
  2. Installation
  3. Configuration
    1. Device Object
      1. Generating the device array
    2. Examples
      1. Simple example
      2. Example with columns
      3. Keep alive example
      4. Notification example
    3. CSS Styling
  4. TelegramBot integration
    1. TelegramBot installation
    2. Telegram usage
  5. Update
  6. Screenshots
  7. Support
  8. License

Technical Overview

The scan of the local area network is performed by the arp-scan tool which uses the Address Resolution Protocol (ARP). ARP is a communication protocol used for discovering the link layer address, such as a MAC address, associated with a given internet layer address, typically an IPv4 address. This mapping is a critical function in the Internet protocol suite. ARP was defined in 1982 by RFC 826, which is Internet Standard STD 37.

This module uses ARP packets to discover all active devices in a LAN even if protected by a firewall designed to hide the presence of the device. Whether you are using ethernet or WiFi, the IPv4 devices on your LAN must respond to ARP or they cannot communicate. Since ARP is non-routable, this type of scanner only works on the local LAN (local subnet or network segment).

Devices cannot hide from ARP packets like they can hide from Ping.

Installation

In your terminal, install arp-scan:

sudo apt-get install arp-scan

Optionally, update the vendor database used by arp-scan:

cd /usr/share/arp-scan
sudo get-iab -v -u http://standards-oui.ieee.org/iab/iab.txt
sudo get-oui -v -u http://standards-oui.ieee.org/oui/oui.txt

Clone this repository into the MagicMirror Modules folder:

cd ~/MagicMirror/modules
git clone https://gitlab.com/doctorfree/MMM-MacAddressScan.git

Install the dependencies (sudo, ping) in the MMM-MacAddressScan module folder:

cd ~/MagicMirror/modules/MMM-MacAddressScan
npm install

Add the module to the modules array in the config/config.js file:

    {
        module: 'MMM-MacAddressScan',
        position: 'top_left', 
        config: {
            // Optional config options
        }        
    },

Configuration

Option Default Description
devices [] an array of devices to be found on the network. See Device object
network -l optional a network mask to limit the scope of the network scan, i.e. 192.168.0.0/24. If omitted, or set to -l, the entire network will be scanned.
interface `` optional the network interface on which to broadcast, useful if arp-scan is not finding devices, for example wlan0 or eth1. leave empty for default
showIP true optional shows the IP address of devices found on the network
showUnknown true optional shows devices found on the network even if not specified in the devices option
showOffline true optional shows devices specified in the devices option even when offline
showLastSeen false optional shows when the device was last seen e.g. "Device Name - last seen 5 minutes ago"
keepAlive 180 optional how long (in seconds) a device should be considered 'alive' since it was last found on the network
updateInterval 20 optional how often (in seconds) the module should scan the network
sort true optional sorts the devices in alphabetical order when shown in the mirror
residents [] optional an array of names of the devices that should be monitored if they are online
occupiedCMD {} optional the notification to be sent if one of the devices in the residents array is found online. See Notification Example.
vacantCMD {} optional the notification to be sent if NONE of the devices in the residents array is found online. See Notification Example.
debug false optional adds extended messages to the log.
colored false optional determines whether devices are shown in the color defined in the devices section.
coloredSymbolOnly false optional shows only the devices symbol.
showLastSeenWhenOffline: false optional show last seen only when offline.
showDeviceColumns: false optional show devices as columns.
coloredState: false optional determines whether devices are shown in a color defined in the devices section and controlled by the online / offline state.

Device Object

The device object contains information about the devices to be found on the network.

Key Description Example
macAddress optional the MAC address of the device. aa:bb:cc:11:22:33
ipAddress optional the IP address or host name of the device. 192.168.0.1 or gitlab.com
name optional the friendly name for the device. If omitted, the macAddress or ipAddress will be used. Phone or Router
icon optional the symbol to show next to the device. See Font Awesome cheatsheet. If omitted, question will be used. There are a huge number of icons to choose from. Here are some examples: globe, server, desktop, laptop, mobile, wifi.
color optional the color the device should be displayed with. #0000ff for blue
colorStateOnline optional the color the device should be displayed with when it is online. #00ff00 for green
colorStateOffline optional the color the device should be displayed with when it is offline. #ff0000 for red
showInNewRow optional add a line break if showDeviceColumns = true. false for no line break

Note: A device object should only contain either a macAddress or an ipAddress NOT both.

Note: MAC and Static IP addresses work more consistently than DHCP assigned addresses or hostnames.

Note: The coloredState parameter overwrites the colored parameter if both parameters are set to true. With the parameter coloredSymbolOnly the status driven coloring can be limited to the icon.

Generating the device array

The devices array can be generated by using arps2mm.sh from within the scripts folder. The output of the script will include all the devices found on the network, using the name of the vendor identified from the arp-scan result. Run the following script, edit the device names and icons then copy the array into the config file:

cd ~/MagicMirror/modules/MMM-MacAddressScan/scripts
chmod +x arps2mm.sh
./arps2mm.sh

If a network interface needs to be specified for arp-scan to detect devices on the local network then run arps2mm.sh with the -I <interface> option. For example:

./arps2mm.sh -I wlan0

Note: Updating the vendor database is recommended before generating the device array. See the installation instructions for details.

Examples

Simple example

Scans the network (using the default updateInterval) and display the status of the four specified devices. Display the IP of discovered devices as well:

    {
        module: "MMM-MacAddressScan",
        position: "top_left",
        header: "Who's home",
        config: {
            devices: [
                { macAddress: "1a:1b:1c:1a:1b:1c", name: "Dad", icon: "male"},
                { macAddress: "2a:2b:2c:2a:2b:2c", name: "Mum", icon: "female"},
                { macAddress: "3a:3b:3c:3a:3b:3c", name: "Son", icon: "male"},
                { macAddress: "4a:4b:4c:4a:4b:4c", name: "Daughter", icon: "female"}
            ],
            showIP: true,
            showUnknown: false,
        }
     }

Example with columns

Displays the specified devices as columns:

    {
        module: "MMM-MacAddressScan",
        position: "top_left",
        header: "Geräte im Netzwerk",
        config: {
            devices: [
                { 
                    ipAddress: "192.168.178.101", 
                    name: "UniFi", 
                    icon: "server", 
                    colorStateOnline: "green", 
                    colorStateOffline: "red",
                },
                { 
                    ipAddress: "192.168.178.31", 
                    name: "QNAP1", 
                    icon: "database", 
                    colorStateOnline: "green", 
                    colorStateOffline: "red",
                 },
                { 
                    ipAddress: "192.168.178.32", 
                    name: "QNAP2", 
                    icon: "database", 
                    colorStateOnline: "green", 
                    colorStateOffline: "red",
                    showInNewRow: true,
                },
                { 
                    ipAddress: "192.168.178.33", 
                    name: "QNAP3", 
                    icon: "database", 
                    colorStateOnline: "green", 
                    colorStateOffline: "red",
                },
                { 
                    ipAddress: "192.168.178.134", 
                    name: "APS", 
                    icon: "wifi", 
                    colorStateOnline: "green", 
                    colorStateOffline: "red",
                 },

            ],
            sort: false,
            showIP: false,
            showUnknown: false,
            showDeviceColumns: true,
            coloredState: true,
        }
    }

Keep alive example

Scan every 5 seconds and only display the specified devices whether they are online or offline. Devices will continue to be shown as online (i.e. kept alive) for 5 mins after they are last found:

    {
        module: 'MMM-MacAddressScan',
        position: 'top_left', 
        config: {
            devices: [
                    { ipAddress: "gitlab.com", name: "Gitlab", icon: "globe"},
                    { macAddress: "1a:1b:1c:1a:1b:1c", name: "Server", icon: "server"},
                    { macAddress: "2a:2b:2c:2a:2b:2c", name: "Desktop", icon: "desktop"},
                    { ipAddress: "10.1.1.10", name: "Laptop", icon: "laptop"},
                    { macAddress: "4a:4b:4c:4a:4b:4c", name: "Mobile", icon: "mobile"},
                ],
            showIP: false,
            showUnknown: false,
            showOffline: true,
            keepAlive: 300,
            updateInterval: 5
        }        
    },

Notification example

As with the previous example, this scans every 5 seconds and only display the specified devices whether they are online or offline. Devices will continue to be shown as online (i.e. kept alive) for 5 mins after they are last found on the network.

In addition, the module will send a notification (occupiedCMD) to turn the monitor on when either Mobile or Laptop (the residents) are found on the network. Another notification (vacantCMD) will be sent when neither device is online:

    {
        module: 'MMM-MacAddressScan',
        position: 'top_left', 
        config: {
            devices: [
                    { ipAddress: "gitlab.com", name: "Gitlab", icon: "globe"},
                    { macAddress: "1a:1b:1c:1a:1b:1c", name: "Server", icon: "server"},
                    { macAddress: "2a:2b:2c:2a:2b:2c", name: "Desktop", icon: "desktop"},
                    { ipAddress: "10.1.1.10", name: "Laptop", icon: "laptop"},
                    { macAddress: "4a:4b:4c:4a:4b:4c", name: "Mobile", icon: "mobile"},
                ],
            showUnknown: false,
            showOffline: true,
            keepAlive: 300,
            updateInterval: 5,
            residents: ["Mobile", "Laptop"],
            occupiedCMD: {notification: 'REMOTE_ACTION', payload: {action: 'MONITORON'}},
            vacantCMD  : {notification: 'REMOTE_ACTION', payload: {action: 'MONITOROFF'}},

        }        
    },

NOTE The REMOTE_ACTION notifications (MONITORON and MONITOROFF) actions require the MMM-Remote-Control module to be installed.

CSS Styling

The default styling applied to the MMM-MacAddressScan module is as follows:

.MMM-MacAddressScan .deviceCell {
  text-align: left;
}

.MMM-MacAddressScan .deviceCell i {
  padding-left: 0;
  padding-right: 10px;
}

.MMM-MacAddressScan .dateCell {
  padding-left: 30px;
  text-align: right;
}

Additional custom styling may be applied with entries in:

MagicMirror/css/custom.css

For example, to increase the font size of devices text labels and module header, add the following to your custom.css file:

.MMM-MacAddressScan .module-header {
  font-size: 28px;
  color: #B5F5F2;
}

.MMM-MacAddressScan .deviceCell {
  font-size: 28px;
}

.MMM-MacAddressScan .headerDevCell {
  font-size: 28px;
}

TelegramBot integration

You can dynamically control some MMM-MacAddressScan configuration settings using the Telegram app by installing the MMM-TelegramBot module and adding MMM-TelegramBot configuration to your config.js.

TelegramBot installation

Follow the instructions at the 4th Party Modules Wiki to create a Telegram Bot, install MMM-TelegramBot, and configure your MagicMirror config.js to enable Telegram commands.

Note: You do not need to create custom commands. The Telegram commands used with MMM-MacAddressScan are already created by the module. You only need to follow the 4th Party Modules Wiki Installation instructions.

Telegram usage

Once installed and configured, you can control your MMM-MacAddressScan display by sending messages in the Telegram app to your previously created Telegram Bot. The supported commands are:

  • /showip
  • /hideip
  • /showOffline
  • /hideOffline
  • /updateInterval <seconds>
  • /getconfig

The commands /showip and /hideip show and hide, respectively, the IP addresses of discovered devices.

The commands /showOffline and /hideOffline show and hide, respectively, offline discovered devices.

The command /updateInterval <seconds> sets the interval betweeen device scans in seconds. The 'seconds' argument must be a non-negative integer and represents the number of seconds between device scans.

The command getconfig displays the current settings for the showIP, showOffline, and updateInterval configuration parameters.

Update

To update the module to the latest version, use your terminal to go to your MMM-MacAddressScan module folder and type the following command:

cd ~/MagicMirror/modules/MMM-MacAddressScan
git pull
npm install

If you haven't changed the module then this should work without problem. Type git status to see your changes. If there are any changes, you can reset them with git reset --hard. After that, git pull should be possible.

Screenshots

Devices as rows or columns

Devices as columns with newLines

Network/System Info Screen and MMM-MacAddressScan Module
Online devices are highlighted with device group color
Offline devices are dimmed with red device icon color
(click to enlarge)

The Network/System Info screenshot is from a MagicMirror configured with the following config.js, custom CSS, and 3rd party modules:

Support

Issues with MMM-MacAddressScan can be reported and tracked in the Issues section of the repository at https://gitlab.com/doctorfree/MMM-MacAddressScan/-/issues

License

Copyright (c) 2016 Ian Perrin

Copyright (c) 2021-2023 Ronald Joe Record

MIT License

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A module for MagicMirror which determines the status of devices on the network based on their MAC address.

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magicmirror arp-scanner arpscan magicmirror-module

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