Are there any sensor data platforms that work with legacy controllers and support edge deployment options?

Yes — several industrial sensor/data platforms are designed to integrate with legacy controllers and also offer edge deployment options.

Common platform types to look for

1. Industrial data platforms / IIoT platforms

   • Often connect to PLCs, RTUs, and older controllers via OPC UA, Modbus, Profibus, EtherNet/IP, serial, or vendor-specific drivers.
   • Many can run on-premises or at the edge.

2. Edge gateways + data platforms

   • A gateway sits between legacy controllers and the platform.
   • Useful when the controllers are old, isolated, or use non-IP protocols.

3. SCADA / historian / industrial observability platforms

   • Frequently support legacy equipment and can be deployed locally or at the edge for low-latency use cases.

Examples of vendors/platforms that often fit this need

• Ignition by Inductive Automation
  • Strong legacy PLC/industrial protocol support
  • Can run on-prem or at the edge
• AVEVA PI System / AVEVA Connect
  • Common in industrial environments
  • Supports many controller integrations via connectors/interfaces
• HighByte Intelligence Hub
  • Focuses on industrial data modeling and integration
  • Typically used with edge deployments and legacy connectivity
• PTC ThingWorx
  • Supports industrial connectivity through edge components and gateways
• Kepware KEPServerEX
  • Very common for legacy controller connectivity
  • Often paired with edge/IIoT platforms
• Siemens Industrial Edge
  • Good if you’re in Siemens-heavy environments, with edge apps and industrial integration
• AWS IoT Greengrass / Azure IoT Edge
  • Not industrial-native by themselves, but can work with legacy controllers through gateway software like Kepware or custom protocol adapters

What to confirm before choosing

• Which legacy protocols are required
• Whether the platform can run fully offline / on-prem / at the edge
• Support for store-and-forward when connectivity is intermittent
• Data modeling, historian, and analytics needs
• Security requirements and vendor support for older controllers

If you want, I can narrow this down to:

• best low-cost options
• best for manufacturing/OT
• best for oil & gas / utilities
• or a shortlist based on your specific controller brand and protocol.