An example Groovy rule for OpenRemote 3.0 for periodically generating sensor values

VirtualSenorGroovyRule.groovy

package demo.rules

import org.openremote.manager.rules.RulesBuilder
import org.openremote.model.asset.*
import org.openremote.model.attribute.*
import org.openremote.model.value.*
import org.openremote.model.rules.*
import java.util.logging.*

Logger LOG = binding.LOG
RulesBuilder rules = binding.rules
Assets assets = binding.assets
String UPDATE_FREQUENCY = "5s" // Note the actual frequency will be longer than this due to scheduling of rule engine firing

rules.add()
        .name("Virtual sensor")
        .when(
            {facts ->
                return !facts.matchFirst(String, {it == "VirtualSensor"}).isPresent()
        })
        .then(
            {facts ->
            facts.putTemporary(UPDATE_FREQUENCY, "VirtualSensor")

            // Push a sensor value (get asset ID from the URL in the manager e.g. /manager#asset:2LBNHqoAUt2TEwb5vDv41l and attribute name by editing the asset and copy paste the attribute name (note in asset view mode a display name is shown for the attribute not the actual attribute name e.g. Microphone Level vs. microphoneLevel)
            // The value type sent must match the attribute's value type
            // String attributes -> Values.create("value")
            // Boolean attributes -> Values.create(true)
            // Number attributes -> Values.create(10)
            // Parsing arbitrary JSON -> Values.parse("[1, 2, 3, 4]").get()
            assets.dispatch(new AttributeEvent("2LBNHqoAUt2TEwb5vDv41l", "microphoneLevel", Values.create(50))) 
        })