Field and application protocols.

Technologies

• MQTT Publish-subscribe telemetry with sessions, quality-of-service levels and retained messages.
• Sparkplug Topic and payload conventions over MQTT for industrial state and birth and death certificates.
• CoAP RESTful messaging for constrained devices over UDP, with observe and block transfer.
• OSCORE and EDHOC End-to-end object security and lightweight key exchange for constrained messaging.
• OPC UA Information models and secure client-server and publish-subscribe for industrial systems.
• Modbus RTU and TCP The common register-based protocol of loggers, inverters, meters and controllers.
• SDI-12 Low-power serial bus for environmental sensors and data loggers.
• DNP3 and IEC 61850 Utility telemetry and substation protocols for power and water assets.
• Compact payload encodings Binary and sensor-specific encodings that keep airtime and energy low.