Unique identifier name of the <a href="https://docs.kelvininc.com/latest/kelvin-overview/kelvin-platform/kelvin-assets/\" target="_blank">Kelvin Asset.
Unique identifier name for the Kelvin Metric.
The payload will depend on what type of Kelvin Bridge is being used. There are four types of Kelvin Bridges; OPC UA, MQTT, Modbus and ROC.