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Schedule the Publication of Readings

The following table describes the configuration variables that can be used with each object in the array of objects of the Schedules parameter:

Parameter Type Description Valid Values Required
device String The name of the device providing readings, as configured in the Devices parameter A valid device name Y
resource String The name of the device resource to publish, as configured in the Devices parameter A valid device resource Y
interval Unsigned Integer The interval in microseconds between the publication of each reading Y
topics Array of strings The topics on which to publish readings N

For further information on the Schedules and Devices parameters, see Device Service Component Configuration.

Schedule Configuration Example

The following example JSON configuration file configures a schedule for readings from the Modbus Network Power Meter Simulation device:

{
  "Library": "libxrt-modbus-device-service.so",
  "Factory": "xrt_modbus_device_service_factory",
  "Name": "modbus_device_service",
  "Topic": "modbus_device_service/data",
  "Devices": {
    "Network-Power-Meter-Simulation": {
      "profile": "Network Power Meter",
      "protocols": {
        "modbus-tcp": {
          "Address": "${MODBUS_DEVICE_ADDRESS}",
          "Port": "1502",
          "UnitID": "1"
        }
      }
    }
  },
  "Schedules": [
    {
      "device": "Network-Power-Meter-Simulation",
      "resource": "Current",
      "interval": 2000000
    },
    {
      "device": "Network-Power-Meter-Simulation",
      "resource": "Energy",
      "interval": 1000000,
      "topics": ["modbus_device_service/readings", "modbus_device_service/energy"]
    }
  ],
  "ProfileDir": "config/profiles",
  "Scheduler": "sched",
  "Logger": "logger",
  "ThreadPool": "pool",
  "Bus": "bus"
}
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