Feature
Expose MQTT, Modbus, OPC UA, BACnet, and KNX communication as part of the running twin instead of a separate static mock.
Connections & Protocol Behavior means that communication is part of the running digital twin, not a separate static mock. Applications can interact with MQTT, Modbus, OPC UA, BACnet, or KNX surfaces while the underlying model state changes.
Related features
Start, inspect, and control running twin instances with live state, actions, and runtime feedback.
Recreate real-world scenarios, edge cases, timing issues, and failure modes before those problems reach hardware-dependent stages.
Inspect live state, protocol behavior, logs, and debugging evidence while twin behavior is running.
Related protocols
Simulate MQTT device behavior with realistic topic updates, retained messages, reconnect flows, and automation interactions.
Emulate Modbus TCP behavior with realistic registers, timing, scaling, reads, writes, and fault conditions.
Validate OPC UA integrations against realistic nodes, namespaces, subscriptions, and scenario-driven system behavior.
Rehearse BACnet smart-building integrations with realistic objects, properties, schedules, alarms, and deterministic replay.
Simulate KNX sensors, actuators, schedules, and group-address traffic before onsite commissioning.
Related guides
Launch an OPC UA simulator in SPX, open the runtime UI, and verify live behavior with a standard client.
Launch a Modbus TCP simulator in SPX, inspect live register behavior, and validate client interactions without hardware.
Launch a BACnet simulator in SPX and verify building objects, values, and runtime behavior before commissioning.
Launch a KNX simulator in SPX, verify group-address updates, and test smart-building automation logic.
Start an MQTT simulator in SPX and verify topic updates, retained messages, and device-like telemetry flows.
Developer resources
Cataloged SPX models across building, industrial, energy, lab, and environment domains.
A Modbus master PLC-style model that supervises device behavior through direct Modbus TCP endpoints.
A process-cell OPC UA model for testing nodes, values, subscriptions, and industrial client behavior.
An MQTT environment sensor model for testing telemetry topics, device-like state, and integration flows.
