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Background
In order to model a real-world IoT application or a solution it is imperative to distribute load. In Greenhouse example we have a total of :
It is impractical to run entire sensors and actuators on one single node (either OnPrem or Cloud)
Cluster Design
Greenhouse Model Review
Complete Greenhouse Model (Queries, Macros, Facets, Models, Types) can be found here
Types
- Primitive Types
- Cardinality
- Defaults
- Composites
<Def Name="EnvInfo">
<Number Name="Temperature"/>
<Number Name="Humidity"/>
<Number Name="Light"/>
<Number Name="Pressure"/>
<Number Name="SoilMoisture"/>
<Number Name="Wind"/>
<String Name="LastUpdatedByProvider"/>
</Def>
<Def Name="BoundingBox">
<GeoLocation Name="Vertex1"/>
<GeoLocation Name="Vertex2"/>
<GeoLocation Name="Vertex3"/>
<GeoLocation Name="Vertex4"/>
</Def>
<Def Name="GeoLocation">
<Number Name="latitude"/>
<Number Name="longitude"/>
</Def>
<Def Name="PeripheralParams">
<String Name="Peripheral" />
<String Name="InterfacePort" />
<String Name="Interface" />
<String Name="UniqueId" default="56789" />
<String Name="Baudrate" />
<String Name="Format" default="ascii" />
<String Name="Operation" />
<String Name="Payload" />
</Def>
<Def Name="PhilipLightState">
<Boolean Name="On"/>
<Integer Name="bri"/>
<Integer Name="hue"/>
<Integer Name="sat"/>
<String Name="effect"/>
<Double Name="xy" cardinality="2"/>
<Integer Name="ct"/>
<String Name="alert"/>
<String Name="colormode"/>
<Boolean Name="reachable"/>
</Def>
<Def Name="ImageSize">
<Number Name="Height" />
<Number Name="Width" />
</Def>
<Def Name="CameraConfig">
<Number Name="Channel" />
<Number Name="Standard" />
<Number Name="Brightness" />
<Number Name="Contrast" />
<Number Name="Gamma" />
<Number Name="Saturation" />
<Number Name="Sharpness" />
<Number Name="Hue" />
<Number Name="Gain" />
<Number Name="Quality" />
</Def>
<Def Name="USBCameraParams">
<ImageSize Name="Size" />
<CameraConfig Name="Configuration" />
<String Name="SaveToDisk" />
<String Name="ImageFormat" />
<String Name="ImageName" />
</Def>
DataModel
- Primitive Types
- Default Format
- Hidden Modifiers
- Simple References
<DataModel Name="Greenhouse">
<Sid Name="GreenhouseID"/>
<String Name="GreenhouseName"/>
<GeoLocation Name="Location"/>
<String Name="LocationName"/>
<BoundingBox Name="Boundary"/>
<Integer Name="LaneCount"/>
<Double Name="LaneWidth"/>
<Double Name="ZoneLength"/>
<Integer Name="ZoneInLane"/>
<Integer Name="ZoneCount"/>
<Double Name="GHLength"/>
<Double Name="GHWidth"/>
<EnvInfo Name="ExternalEnv"/>
<EnvInfo Name="InternalEnv"/>
<String Name="VentOnOffState"/>
<String Name="FansOnOffState"/>
<Boolean Name="SunnyDay"/>
<Boolean Name="Running" default="false"/> <!-- true / false -->
<Reference Name="GHLanes"/>
<Reference Name="GHExternalEnv"/>
<Reference Name="GHInternalEnv"/>
</DataModel>
<DataModel Name="Lane">
<Sid Name="LaneID"/>
<String Name="LaneName"/>
<Double Name="LaneLength"/>
<Double Name="LaneWidth"/>
<Integer Name="ZoneInLane"/>
<String Name="BorderLane"/>
<BoundingBox Name="LaneLocation"/>
<Reference Name="GreenhouseID" Type="Greenhouse" Cardinality="1"/>
<Reference Name="LaneZones"/>
</DataModel>
<DataModel Name="Zone">
<Sid Name="ZoneID"/>
<String Name="ZoneName"/>
<BoundingBox Name="ZoneLocation"/>
<GeoLocation Name="Location"/>
<Double Name="ZoneWidth"/>
<Double Name="ZoneLength"/>
<Integer Name="GridOnLength"/>
<Integer Name="GridOnWidth"/>
<Integer Name="GridCount"/>
<Double Name="GridLength"/>
<Double Name="GridWidth"/>
<String Name="EndZone"/>
<Double Name="ZoneTemperature"/>
<Double Name="ZoneHumidity"/>
<Double Name="ZoneAvgSM"/>
<Double Name="ZoneAvgLight"/>
<String Name="CropType"/>
<Date Name="SeedingDate" format="$SimpleDateFormat(dd-MM-yyyy)"/>
<Date Name="LastFertilisationDate" format="$SimpleDateFormat(dd-MM-yyyy)"/>
<String Name="HarvestingSeason"/>
<Integer Name="NoOfPlants"/>
<Double Name="VPD"/>
<String Name="Live"/> <!-- Yes/No -->
<Reference Name="LaneID" Type="Lane" Cardinality="1"/>
<Reference Name="ZoneGrids"/>
</DataModel>
<DataModel Name="Grid">
<Sid Name="GridID"/>
<String Name="GridName"/>
<BoundingBox Name="GridLocation"/>
<Integer Name="GridNSPosition"/>
<Integer Name="GridWEPosition"/>
<Double Name="GridLength"/>
<Double Name="GridWidth"/>
<Double Name="SoilMoisture"/>
<Double Name="AmbientLight"/>
<Reference Name="ZoneID" Type="Zone" Cardinality="1"/>
</DataModel>
<AppModel Name="ExternalEnv">
<Sid Name="ExternalEnvID"/>
<Number Name="ExtTemperature"/>
<Number Name="ExtHumidity"/>
<Number Name="ExtLight"/>
<Reference Name="GreenhouseID" Type="Greenhouse" Cardinality="1"/>
</AppModel>
<AppModel Name="InternalEnv">
<Sid Name="InternalEnvID"/>
<Number Name="IntTemperature"/>
<Number Name="IntHumidity"/>
<Number Name="IntLight"/>
<Reference Name="GreenhouseID" Type="Greenhouse" Cardinality="1"/>
</AppModel>
<DataModel Name="AvgCityTemp">
<Sid Name="Sid"/>
<Number Name="Month"/>
<Number Name="AvgMonthHighTemp"/>
<Number Name="AvgMonthLowTemp"/>
</DataModel>
<DataModel Name="AvgCityHumidity">
<Sid Name="Sid"/>
<Number Name="Month" Modifiers="hidden"/>
<Number Name="MorningHumidity"/>
<Number Name="AfternoonHumidity"/>
</DataModel>
<DataModel Name="GHTempSensorCurrentTemp">
<Sid Name="Sid"/>
<String Name="TempSensorID"/>
<Double Name="CurrentTemp"/>
<Reference Name="GreenhouseID" Type="Greenhouse" Cardinality="1"/>
</DataModel>
<DataModel Name="GHHumiditySensorCurrentHumidity">
<Sid Name="Sid"/>
<String Name="HumiditySensorID"/>
<Double Name="CurrentHumidity"/>
<Reference Name="GreenhouseID" Type="Greenhouse" Cardinality="1"/>
</DataModel>
ThingModel and ThingFacets
- Protocol Handlers Used: PERIF, UCAM, HTTP, PHID
- Attach Things to Data using Simple References
- Proxy Sensor Design Pattern (Single MCUThingFacet → All Sensors)
- ThingFacets with Multiple Actions
- ThingFacet to load Vendor-Specified MetaData
<ThingModel Name="GHHumiditySensor" Combines="GHHumiditySensorFacet">
<Sid Name="SensorId"/>
<Reference Name="GreenhouseID" Type="Greenhouse" Cardinality="1"/>
</ThingModel>
<ThingModel Name="GHTempSensor" Combines="GHTempSensorFacet">
<Sid Name="sensorId"/>
<Reference Name="GreenhouseID" Type="Greenhouse" Cardinality="1"/>
</ThingModel>
<ThingModel Name="ServoMotorDevice" combines="ServoMotor">
<Sid Name="ServoID"/>
</ThingModel>
<ThingModel Name="HumiditySensor" Combines="HumiditySensorFacetNS">
<Sid Name="sensorId"/>
<Reference Name="ZoneID" Type="Zone" Cardinality="1"/>
</ThingModel>
<ThingModel Name="Heater">
<Sid Name="HeaterID"/>
<String Name="OnOffState"/>
<Integer Name="HeatingLevel"/>
<Reference Name="ZoneID" Type="Zone" Cardinality="1"/>
</ThingModel>
<ThingModel Name="LightModel" Combines="LightFacetNS">
<Sid Name="LightID"/>
<Reference Name="GridID" Type="Grid" Cardinality="1"/>
</ThingModel>
<ThingModel Name="AmbientLightSensorModel" Combines="AmbientLightSensorFacetNS">
<Sid Name="AmbientLightID"/>
<Reference Name="GridID" Type="Grid" Cardinality="1"/>
</ThingModel>
<ThingModel Name="IrrigationNozzleModel" Combines="IrrigationNozzleFacetNS">
<Sid Name="IrrigationNozzleID"/>
<Reference Name="GridID" Type="Grid" Cardinality="1"/>
</ThingModel>
<ThingModel Name="MCUSensorModel" combines="MCUSensorFacet">
<Sid Name="SensorId"/>
</ThingModel>
Macros
- Pipeline Macros - ExecuteQuery, ScheduleJob, UnScheduleJob, SubscribeToTQL
- Greenhouse Creation (Bulk Initialization)
- Simulate Sensors & Actuators
- Internal Activation of ThingFacets
<Macro Name="ExecuteQuery">
<Argument>
<QueryString>
<Query/>
</QueryString>
</Argument>
<Result>
<OnRequest Target="[:RuntimeParams.FacetIDName:]" Disable="CMD_SERVER">
<Process Return="CMD_NOP">
<Message>
<Value>
[:$Macro.Argument.QueryString:]
</Value>
</Message>
</Process>
</OnRequest>
</Result>
</Macro>
Gateway Setup
Cloud Setup
Cluster Definition
- Same Model definition in all the nodes participating in the cluster.