Thanks - I did change the config to add one device “JoJo” with an IpAddress and I changed “Millie” from IpAddress to MacAddress (I am guessing that is why it is not showing in the ping result - but am not sure). I did not make any other changes to the config (apart from adding the debug line). There is no other bottom_center module and it clearly displays Devices Online “Loading…”, so I don’t think it’s the case that entries are being pushed off the page.

 {
139                         module:                 "MMM-NetworkScanner",
140                         position:               "bottom_center",
141                         header:                 "Devices Online",
142                         config: {
143                                 devices: [
144                                 { ipAddress: "192.168.1.11", name: "Champagne", icon: "server"},
145                                 { macAddress: "xxxx", name: "Millie", icon: "server"},
146                                 { ipAddress: "192.168.1.17", name:  "Marmite", icon:  "server"},
147                                 { ipAddress: "192.168.1.70", name: "JoJo", icon: "male"}
148                                 ],
149                                 showUnknown: false,
150                                 showOffline:  true,
151                                 keepAlive:  600,
152                                 showLastSeen:  true,
153                                 updateInterval:  30,
154                                 debug: true,
155                                 Password:  'xxxx'
156                                 }
157                 },

Thanks. Scan seems to find some devices, but does not display them on Mirror.

Here is output log:

[20:41:24.611] [LOG]    MMM-NetworkScanner is performing arp-scan
[20:41:24.650] [LOG]    MMM-NetworkScanner is performing ip address scan
[20:41:24.651] [LOG]    MMM-NetworkScanner is checking device:  Champagne
[20:41:24.651] [LOG]    MMM-NetworkScanner is pinging  192.168.1.11
[20:41:24.666] [LOG]    MMM-NetworkScanner is checking device:  Millie
[20:41:24.667] [LOG]    MMM-NetworkScanner is checking device:  Marmite
[20:41:24.667] [LOG]    MMM-NetworkScanner is pinging  192.168.1.17
[20:41:24.690] [LOG]    MMM-NetworkScanner is checking device:  JoJo
[20:41:24.691] [LOG]    MMM-NetworkScanner is pinging  192.168.1.70
[20:41:24.705] [LOG]    MMM-NetworkScanner completed SCAN_NETWORK
[20:41:24.707] [LOG]    MMM-NetworkScanner ping result:  [ 'Champagne', true ]
[20:41:26.741] [LOG]    MMM-NetworkScanner ping result:  [ 'Marmite', false ]
[20:41:26.743] [LOG]    MMM-NetworkScanner ping result:  [ 'JoJo', false ]
[20:41:54.605] [LOG]    MMM-NetworkScanner received SCAN_NETWORK
[20:41:54.605] [LOG]    MMM-NetworkScanner is performing arp-scan
[20:41:54.630] [LOG]    MMM-NetworkScanner is performing ip address scan
[20:41:54.631] [LOG]    MMM-NetworkScanner is checking device:  Champagne
[20:41:54.631] [LOG]    MMM-NetworkScanner is pinging  192.168.1.11
[20:41:54.644] [LOG]    MMM-NetworkScanner is checking device:  Millie
[20:41:54.645] [LOG]    MMM-NetworkScanner is checking device:  Marmite
[20:41:54.645] [LOG]    MMM-NetworkScanner is pinging  192.168.1.17
[20:41:54.658] [LOG]    MMM-NetworkScanner is checking device:  JoJo
[20:41:54.659] [LOG]    MMM-NetworkScanner is pinging  192.168.1.70
[20:41:54.672] [LOG]    MMM-NetworkScanner completed SCAN_NETWORK
[20:41:54.675] [LOG]    MMM-NetworkScanner ping result:  [ 'Champagne', true ]
[20:41:56.706] [LOG]    MMM-NetworkScanner ping result:  [ 'Marmite', false ]
[20:41:56.707] [LOG]    MMM-NetworkScanner ping result:  [ 'JoJo', false ]

Error log:

[20:35:38.953] [ERROR]  (node:20348) MaxListenersExceededWarning: Possible Event                                                                                                                                                             Emitter memory leak detected. 11 error listeners added. Use emitter.setMaxListen                                                                                                                                                             ers() to increase limit
[20:35:38.953] [ERROR]  (node:20348) MaxListenersExceededWarning: Possible Event                                                                                                                                                             Emitter memory leak detected. 11 end listeners added. Use emitter.setMaxListener                                                                                                                                                             s() to increase limit
[20:35:38.954] [ERROR]  (node:20348) MaxListenersExceededWarning: Possible Event                                                                                                                                                             Emitter memory leak detected. 11 drain listeners added. Use emitter.setMaxListen                                                                                                                                                             ers() to increase limit
[20:35:38.954] [ERROR]  (node:20348) MaxListenersExceededWarning: Possible Event                                                                                                                                                             Emitter memory leak detected. 11 close listeners added. Use emitter.setMaxListen                                                                                                                                                             ers() to increase limit
[20:35:38.955] [ERROR]  (node:20348) MaxListenersExceededWarning: Possible Event                                                                                                                                                             Emitter memory leak detected. 11 data listeners added. Use emitter.setMaxListene                                                                                                                                                             rs() to increase limit

@sdetweil
Thanks Sam

Tried update. Error log below:

[11:45:29.130] [ERROR]  TypeError: Cannot read property 'network' of undefined
    at Class.scanNetworkMAC (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:46:36)
    at Class.socketNotificationReceived (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:33:18)
    at Socket.<anonymous> (/home/jojo/MagicMirror/js/node_helper.js:113:11)
    at Socket.emit (events.js:198:13)
    at /home/jojo/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
    at process._tickCallback (internal/process/next_tick.js:61:11)

Node_helper code:

        // Target hosts/network supplied in config or entire localnet
 46         var arpHosts = self.config.network || '-l';
 47                                 var options = {
 48                                                 cachePassword: true,
 49                                                 prompt: 'Password,' + self.config.Password     // put your password where ???? are (notice the quotes around)
 50                                 }
 51         var arp = sudo(['arp-scan', '-q', arpHosts]) //, options);

Module entry in config.js:

                {
139                         module:                 "MMM-NetworkScanner",
140                         position:               "bottom_center",
141                         header:                 "Devices Online",
142                         config: {
143                                 devices: [
144                                 { ipAddress: "192.168.1.11", name: "Champagne", icon: "server"},
145                                 { ipAddress: "192.168.1.15", name: "Millie", icon: "server"},
146                                 { ipAddress: "192.168.1.17", name:  "Marmite", icon:  "server"}
147                                 ],
148                                 showUnknown: false,
149                                 showOffline:  true,
150                                 keepAlive:  600,
151                                 showLastSeen:  true,
152                                 updateInterval:  30,
153                                 Password:  'xxxx'
154                                 }
155                 },

@sdetweil
Hi Sam - thanks I tried the update. Still getting the same error - from the log:

[19:00:49.868] [ERROR]  TypeError: Cannot read property 'network' of undefined
    at Class.scanNetworkMAC (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:42:36)
    at Class.socketNotificationReceived (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:30:18)
    at Socket.<anonymous> (/home/jojo/MagicMirror/js/node_helper.js:113:11)
    at Socket.emit (events.js:198:13)
    at /home/jojo/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
    at process._tickCallback (internal/process/next_tick.js:61:11)

That is how the config looks.

Still getting the node_helper line 42 error. Will park this for now. Thank you for spending so much time on this Sam - much appreciated. Will come back to this later in the week.

Hmm

So with the password entered only in the config file, the error output still references line 42

 var arpHosts = this.config.network || '-l';

Error output:

0|mm       | [19:37:36.956] [ERROR]  TypeError: Cannot read property 'network' of undefined
0|mm       |     at Class.scanNetworkMAC (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:42:36)
0|mm       |     at Class.socketNotificationReceived (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:30:18)
0|mm       |     at Socket.<anonymous> (/home/jojo/MagicMirror/js/node_helper.js:113:11)
0|mm       |     at Socket.emit (events.js:198:13)
0|mm       |     at /home/jojo/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
0|mm       |     at process._tickCallback (internal/process/next_tick.js:61:11)

0|mm  | [19:37:50.982] [LOG]    MMM-NetworkScanner received SCAN_NETWORK
0|mm  | [19:37:50.983] [LOG]    MMM-NetworkScanner is performing arp-scan
0|mm  | [19:37:50.984] [LOG]    Whoops! There was an uncaught exception...
0|mm  | [19:37:50.984] [ERROR]
0|mm  | TypeError: Cannot read property 'network' of undefined
0|mm  |     at Class.scanNetworkMAC (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:42:36)
0|mm  |     at Class.socketNotificationReceived (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:30:18)
0|mm  |     at Socket.<anonymous> (/home/jojo/MagicMirror/js/node_helper.js:113:11)
0|mm  |     at Socket.emit (events.js:198:13)
0|mm  |     at /home/jojo/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
0|mm  |     at process._tickCallback (internal/process/next_tick.js:61:11)
0|mm  | [19:37:50.985] [LOG]
0|mm  | MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection?
0|mm  | [19:37:50.986] [LOG]    If you think this really is an issue, please open an issue on GitHub: https://github.com/MichMich/MagicMirror/issues
0|mm  | [19:38:21.046] [LOG]
0|mm  | MMM-NetworkScanner received SCAN_NETWORK
0|mm  | [19:38:21.047] [LOG]
0|mm  | MMM-NetworkScanner is performing arp-scan
0|mm  | [19:38:21.048] [LOG]    Whoops! There was an uncaught exception...
0|mm  | [19:38:21.048] [ERROR]
0|mm  | TypeError: Cannot read property 'network' of undefined
0|mm  |     at Class.scanNetworkMAC (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:42:36)
0|mm  |     at Class.socketNotificationReceived (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:30:18)
0|mm  |     at Socket.<anonymous> (/home/jojo/MagicMirror/js/node_helper.js:113:11)
0|mm  |     at Socket.emit (events.js:198:13)
0|mm  |     at /home/jojo/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
0|mm  |     at process._tickCallback (internal/process/next_tick.js:61:11)

Sorry I’m not being clear. I know that I need to modify the config.js (and have done so), but in line 45 of node_helper.js (as shown below) there is:

 prompt: 'Password,' + this.config.Password     // put your password where ???? are (notice the quotes around)

Should I leave this as is or fill in the password? That is where I have tried it both ways.

Code you asked for from node_helper.js:

    scanNetworkMAC: function() {
 38         this.log(this.name + " is performing arp-scan");
 39
 40         var self = this;
 41         // Target hosts/network supplied in config or entire localnet
 42         var arpHosts = this.config.network || '-l';
 43                                 var options = {
 44                                                 cachePassword: true,
 45                                                 prompt: 'Password,' + this.config.Password     // put your password where ???? are (notice the quotes around)
 46                                 }
 47         var arp = sudo(['arp-scan', '-q', arpHosts], options);

@sdetweil
I tried it both ways - but should the ‘password’ field in the helper file be filled in?

@karsten13
Hi - it seems to function correctly - it returns the IP and MAC addresses of the various clients on the network.

@sdetweil
Thanks Sam - tried your version of the module and modified the config.js accordingly. Still not quite working. Error logs as follows:

0|mm       |     at process._tickCallback (internal/process/next_tick.js:61:11)
0|mm       | [09:41:25.508] [ERROR]  ReferenceError: options is not defined
0|mm       |     at Class.scanNetworkMAC (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:42:54)
0|mm       |     at Class.socketNotificationReceived (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:29:18)
0|mm       |     at Socket.<anonymous> (/home/jojo/MagicMirror/js/node_helper.js:113:11)
0|mm       |     at Socket.emit (events.js:198:13)
0|mm       |     at /home/jojo/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
0|mm       |     at process._tickCallback (internal/process/next_tick.js:61:11)
0|mm       | [09:41:55.508] [ERROR]  ReferenceError: options is not defined
0|mm       |     at Class.scanNetworkMAC (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:42:54)
0|mm       |     at Class.socketNotificationReceived (/home/jojo/MagicMirror/modules/MMM-NetworkScanner/node_helper.js:29:18)
0|mm       |     at Socket.<anonymous> (/home/jojo/MagicMirror/js/node_helper.js:113:11)
0|mm       |     at Socket.emit (events.js:198:13)
0|mm       |     at /home/jojo/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
0|mm       |     at process._tickCallback (internal/process/next_tick.js:61:11)