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Empower Your Build

Simulate, Integrate, Validate

Realistic simulations for real-world integration and testing.

Solutions

Dashboard of SPX industrial protocol simulator showing virtual devices and live data

MQTT Simulator

QoS, RETAINED, LWT - REALISTIC DEVICE BEHAVIOR

Launch MQTT device simulations and validate topic updates, reconnect storms, and automation flows. Replay deterministic scenarios and debug with logs—without physical hardware.

Modbus

Simulator

REGISTER MAPS, SCALING, TIMING EDGE CASES

Emulate Modbus TCP devices with realistic register behavior, endianness, and timeouts. Verify reads/writes, faults, and regressions in a repeatable, CI-ready virtual lab.

OPC UA

Simulator

ADDRESS SPACE FIDELITY AND SUBSCRIPTION WORKFLOWS

Test OPC UA integrations against a controllable server: nodes, namespaces, browse/read/write, and subscriptions. Reproduce timing/state issues deterministically and validate client behavior end-to-end.

BACnet

Simulator

BMS-READY OBJECTS, PROPERTIES, AND COV PATTERNS

Rehearse BACnet smart-building integrations offline. Validate value changes, alarms, and common commissioning scenarios with deterministic replay and full observability.

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KNX

Simulator

GROUP ADDRESS UPDATES AND ACTUATOR SEMANTICS

Simulate KNX sensors and actuators (e.g., blinds, switches) and validate live group address updates. Test schedules, overrides, and automation logic with repeatable scenarios.

Built by Professionals, for Professionals

SPX was created by engineers with years of experience in industrial automation, embedded systems, and software engineering.
After decades of working on distributed systems, signal processing, and control software, we saw how difficult it was to test and validate device-related code in realistic environments. SPX was born from that need — to bring simplicity, flexibility, and realism to the simulation process without heavy infrastructure or complex setup.

Every feature of SPX reflects real-world engineering practice.
It’s designed for professionals who build and test software that interacts with physical devices — from industrial controllers and sensors to robotics, automotive, and medical systems. SPX gives engineers the ability to model physics, communication, and control logic directly in code, making simulation a natural extension of the development workflow.

Developer with problem
Colorful Light Streaks

Simulate systems end-to-end
and ship with confidence.

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