[iammeter] Iammeter Binding initial contribution

bom/openhab-addons/pom.xml

@@ -414,6 +414,11 @@
       <artifactId>org.openhab.binding.hyperion</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.openhab.addons.bundles</groupId>
+      <artifactId>org.openhab.binding.iammeter</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.openhab.addons.bundles</groupId>
       <artifactId>org.openhab.binding.iaqualink</artifactId>

bundles/org.openhab.binding.iammeter/.classpath

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src/main/java"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

bundles/org.openhab.binding.iammeter/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.openhab.binding.iammeter</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

bundles/org.openhab.binding.iammeter/NOTICE

@@ -0,0 +1,13 @@
+This content is produced and maintained by the openHAB project.
+
+* Project home: https://www.openhab.org
+
+== Declared Project Licenses
+
+This program and the accompanying materials are made available under the terms
+of the Eclipse Public License 2.0 which is available at
+https://www.eclipse.org/legal/epl-2.0/.
+
+== Source Code
+
+https://github.com/openhab/openhab-addons

bundles/org.openhab.binding.iammeter/README.md

@@ -0,0 +1,57 @@
+# Iammeter Binding 
+
+[Iammeter](https://www.iammeter.com) provides real-time readings of single-phase (WEM3080, WEM3162) and three-phase (WEM3080T) meters from IAMMETER over Wi-Fi.
+
+## Use of the binding
+
+The Iammeter is exposed as one thing with a number of channels that can be used to read the values for different aspects of your Iammeter devices. 
+
+## Setup of the binding
+
+You can add the Iammeter device via the openHAB UI manually.
+
+
+## Available channels
+
+The following table is taken from the official manual and contains all available channels.
+
+Single-phase energy meter (WEM3080/WEM3162)
+| Name           | Unit | Description                  | Type                     |
+|----------------|------|------------------------------|--------------------------|
+| voltage_a      | V    | Voltage                      | Number:ElectricPotential |
+| current_a      | A    | Current                      | Number:ElectricCurrent   |
+| power_a        | W    | Active power                 | Number:Power             |
+| importenergy_a | kWh  | Energy consumption from gird | Number:Energy            |
+| exportgrid_a   | kWh  | Energy export to grid        | Number:Energy            |
+
+
+Three-phase energy meter (WEM3080T)
+| Name           | Unit | Description           | Type                     |
+|----------------|------|-----------------------|--------------------------|
+| voltage_a      | V    | A phase voltage       | Number:ElectricPotential |
+| current_a      | A    | A phase current       | Number:ElectricCurrent   |
+| power_a        | W    | A phase active power  | Number:Power             |
+| importenergy_a | kWh  | A phase import energy | Number:Energy            |
+| exportgrid_a   | kWh  | A phase export energy | Number:Energy            |
+| frequency_a    | kWh  | A phase frequency     | Number:Frequency         |
+| pf_a           | kWh  | A phase power factor  | Number                   |
+| voltage_b      | V    | B phase voltage       | Number:ElectricPotential |
+| current_b      | A    | B phase current       | Number:ElectricCurrent   |
+| power_b        | W    | B phase active power  | Number:Power             |
+| importenergy_b | kWh  | B phase import energy | Number:Energy            |
+| exportgrid_b   | kWh  | B phase export energy | Number:Energy            |
+| frequency_b    | kWh  | B phase frequency     | Number:Frequency         |
+| pf_b           | kWh  | B phase power factor  | Number                   |
+| voltage_c      | V    | C phase voltage       | Number:ElectricPotential |
+| current_c      | A    | C phase current       | Number:ElectricCurrent   |
+| power_c        | W    | C phase active power  | Number:Power             |
+| importenergy_c | kWh  | C phase import energy | Number:Energy            |
+| exportgrid_c   | kWh  | C phase export energy | Number:Energy            |
+| frequency_c    | kWh  | C phase frequency     | Number:Frequency         |
+| pf_c           | kWh  | C phase power factor  | Number                   |
+
+
+
+## More information
+
+More information about the Iammeter devices can be found in the [Iammeter website](https://www.iammeter.com). 

bundles/org.openhab.binding.iammeter/pom.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.openhab.addons.bundles</groupId>
+    <artifactId>org.openhab.addons.reactor.bundles</artifactId>
+    <version>2.5.9-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>org.openhab.binding.iammeter</artifactId>
+
+  <name>openHAB Add-ons :: Bundles :: Iammeter Binding</name>
+
+</project>

bundles/org.openhab.binding.iammeter/src/main/feature/feature.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<features name="org.openhab.binding.iammeter-${project.version}" xmlns="http://karaf.apache.org/xmlns/features/v1.4.0">
+	<repository>mvn:org.openhab.core.features.karaf/org.openhab.core.features.karaf.openhab-core/${ohc.version}/xml/features</repository>
+
+	<feature name="openhab-binding-iammeter" description="Iammeter Binding" version="${project.version}">
+		<feature>openhab-runtime-base</feature>
+		<bundle start-level="80">mvn:org.openhab.addons.bundles/org.openhab.binding.iammeter/${project.version}</bundle>
+	</feature>
+</features>

bundles/org.openhab.binding.iammeter/src/main/java/org/openhab/binding/iammeter/internal/Iammeter3080THandler.java

@@ -0,0 +1,64 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.iammeter.internal;
+
+import java.util.List;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.smarthome.core.thing.Channel;
+import org.eclipse.smarthome.core.thing.Thing;
+import org.eclipse.smarthome.core.thing.ThingStatus;
+import org.eclipse.smarthome.core.types.State;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+
+/**
+ * The {@link IammeterHandler} is responsible for handling commands, which are
+ * sent to one of the channels.
+ *
+ * @author Yang Bo - Initial contribution
+ */
+
+@NonNullByDefault
+public class Iammeter3080THandler extends IammeterBaseHandler {
+
+    public Iammeter3080THandler(Thing thing) {
+        super(thing);
+    }
+
+    @SuppressWarnings("null")
+    @Override
+    protected void resolveData(String response) {
+        JsonElement iammeterDataElement = new JsonParser().parse(response);
+        JsonObject iammeterData = iammeterDataElement.getAsJsonObject();
+        String keyWord = "Datas";
+        if (iammeterData.has("Datas") && iammeterData.has("SN")) {
+            String groups[] = { "powerPhaseA", "powerPhaseB", "powerPhaseC" };
+            for (int row = 0; row < groups.length; row++) {
+                String gpName = groups[row];
+                List<Channel> chnList = getThing().getChannelsOfGroup(gpName);
+                for (IammeterWEM3080Channel channelConfig : IammeterWEM3080Channel.values()) {
+                    Channel chnl = chnList.get(channelConfig.ordinal());
+                    if (chnl != null) {
+                        State state = getQuantityState(iammeterData.get(keyWord).getAsJsonArray().get(row)
+                                .getAsJsonArray().get(channelConfig.ordinal()).toString(), channelConfig.getUnit());
+                        updateState(chnl.getUID(), state);
+                    }
+                }
+                updateStatus(ThingStatus.ONLINE);
+            }
+        }
+    }
+}

bundles/org.openhab.binding.iammeter/src/main/java/org/openhab/binding/iammeter/internal/IammeterBaseHandler.java

@@ -0,0 +1,126 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.iammeter.internal;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+
+import javax.measure.Unit;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.eclipse.smarthome.core.cache.ExpiringCache;
+import org.eclipse.smarthome.core.library.types.QuantityType;
+import org.eclipse.smarthome.core.thing.ChannelUID;
+import org.eclipse.smarthome.core.thing.Thing;
+import org.eclipse.smarthome.core.thing.ThingStatus;
+import org.eclipse.smarthome.core.thing.ThingStatusDetail;
+import org.eclipse.smarthome.core.thing.binding.BaseThingHandler;
+import org.eclipse.smarthome.core.types.Command;
+import org.eclipse.smarthome.core.types.RefreshType;
+import org.eclipse.smarthome.core.types.State;
+import org.eclipse.smarthome.core.types.UnDefType;
+import org.eclipse.smarthome.io.net.http.HttpUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.gson.JsonSyntaxException;
+
+/**
+ * The {@link IammeterHandler} is responsible for handling commands, which are
+ * sent to one of the channels.
+ *
+ * @author Yang Bo - Initial contribution
+ */
+
+@NonNullByDefault
+public abstract class IammeterBaseHandler extends BaseThingHandler {
+
+    private final Logger logger = LoggerFactory.getLogger(IammeterBaseHandler.class);
+    private @Nullable ScheduledFuture<?> refreshJob;
+    private IammeterConfiguration config;
+    private static final int TIMEOUT_MS = 5000;
+    private final ExpiringCache<Boolean> refreshCache = new ExpiringCache<>(Duration.ofSeconds(5), this::refresh);
+
+    public IammeterBaseHandler(Thing thing) {
+        super(thing);
+        config = getConfiguration();
+    }
+
+    @Override
+    public void handleCommand(ChannelUID channelUID, Command command) {
+        if (command instanceof RefreshType) {
+            refreshCache.getValue();
+        }
+    }
+
+    @Override
+    public void initialize() {
+        ScheduledFuture<?> refreshJob = this.refreshJob;
+        config = getConfiguration();
+        if (refreshJob == null) {
+            refreshJob = scheduler.scheduleWithFixedDelay(this::refresh, 0, config.refreshInterval, TimeUnit.SECONDS);
+            this.refreshJob = refreshJob;
+            updateStatus(ThingStatus.UNKNOWN);
+        }
+    }
+
+    protected abstract void resolveData(String response);
+
+    @SuppressWarnings("null")
+    private boolean refresh() {
+        refreshCache.invalidateValue();
+        IammeterConfiguration config = this.config;
+        try {
+            String httpMethod = "GET";
+            String url = "http://" + config.username + ":" + config.password + "@" + config.host + ":" + config.port
+                    + "/monitorjson";
+            String response = HttpUtil.executeUrl(httpMethod, url, TIMEOUT_MS);
+            resolveData(response);
+            updateStatus(ThingStatus.ONLINE);
+            return true;
+            // Very rudimentary Exception differentiation
+        } catch (IOException e) {
+            updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
+                    "Communication error with the device: " + e.getMessage());
+        } catch (JsonSyntaxException je) {
+            logger.warn("Invalid JSON when refreshing source {}: {}", getThing().getUID(), je.getMessage());
+            updateStatus(ThingStatus.OFFLINE);
+        }
+        return false;
+    }
+
+    protected State getQuantityState(String value, Unit<?> unit) {
+        try {
+            return QuantityType.valueOf(Float.parseFloat(value), unit);
+        } catch (NumberFormatException e) {
+            return UnDefType.UNDEF;
+        }
+    }
+
+    @Override
+    public void dispose() {
+        ScheduledFuture<?> refreshJob = this.refreshJob;
+        if (refreshJob != null && !refreshJob.isCancelled()) {
+            refreshJob.cancel(true);
+            this.refreshJob = null;
+        }
+        super.dispose();
+    }
+
+    public IammeterConfiguration getConfiguration() {
+        return this.getConfigAs(IammeterConfiguration.class);
+    }
+}

bundles/org.openhab.binding.iammeter/src/main/java/org/openhab/binding/iammeter/internal/IammeterBindingConstants.java

@@ -0,0 +1,32 @@
+/**
+ * Copyright (c) 2010-2020 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.binding.iammeter.internal;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.smarthome.core.thing.ThingTypeUID;
+
+/**
+ * The {@link IammeterBindingConstants} class defines common constants, which are
+ * used across the whole binding.
+ *
+ * @author yang bo - Initial contribution
+ */
+@NonNullByDefault
+public class IammeterBindingConstants {
+
+    public static final String BINDING_ID = "iammeter";
+
+    // List of all Thing Type UIDs
+    public static final ThingTypeUID THING_TYPE_POWERMETER = new ThingTypeUID(BINDING_ID, "powermeter");
+    public static final ThingTypeUID THING_TYPE_POWERMETER_3080T = new ThingTypeUID(BINDING_ID, "powermeter3080T");
+}