Doesn't detect hosts on network

[SimplyPeace]

When I launched the program the first time it could detect a few hosts, but now it can't detect any hosts at all on my home network with multiple devices connected.

[roccomuso]

Hmm Currently i'm using a "Ping Sweep" technique to discover hosts.
The node-arp lib does a var ping = spawn("ping", [ "-c", "1", ipaddress ]); to populate the ARP table and get IP and Mac Address. I don't know if there's a better method.
Could you try to call Network.js#L47 manually?
Which OS are you using?
Paste here your arp table: arp -a