Do not plug a free BACnet simulator into a live, operational commercial building network without permission.
All the simulators listed above are (Ethernet). Why? Because you can run them on your WiFi laptop without a $500 USB-to-MSTP dongle (like the BASrouter). free bacnet ip device simulator
If you are in a Niagara environment (Ax, N4, or Web Supervisor), you love Java. The open-source BACnet Stack for Java (part of the Serotonin project) includes a robust simulator. Do not plug a free BACnet simulator into