2 * Copyright (c) 2010-2023 Contributors to the openHAB project
4 * See the NOTICE file(s) distributed with this work for additional
7 * This program and the accompanying materials are made available under the
8 * terms of the Eclipse Public License 2.0 which is available at
9 * http://www.eclipse.org/legal/epl-2.0
11 * SPDX-License-Identifier: EPL-2.0
13 package org.openhab.binding.hue.internal.api.dto.clip2;
15 import org.eclipse.jdt.annotation.NonNullByDefault;
16 import org.eclipse.jdt.annotation.Nullable;
17 import org.openhab.core.library.types.OnOffType;
18 import org.openhab.core.library.types.QuantityType;
19 import org.openhab.core.library.unit.Units;
20 import org.openhab.core.types.State;
21 import org.openhab.core.types.UnDefType;
23 import com.google.gson.annotations.SerializedName;
26 * DTO for CLIP 2 light level sensor.
28 * @author Andrew Fiddian-Green - Initial contribution
31 public class LightLevel {
32 private @SerializedName("light_level") int lightLevel;
33 private @SerializedName("light_level_valid") boolean lightLevelValid;
34 private @Nullable @SerializedName("light_level_report") LightLevelReport lightLevelReport;
37 * The underlying field is deprecated in the CLIP 2 API.
38 * Moved to light_level_report/light_level
39 * Should be used only as fallback for older firmwares.
41 public int getLightLevel() {
46 * The underlying field is deprecated in the CLIP 2 API.
47 * Indication whether the value presented in light_level is valid
48 * Should be used only as fallback for older firmwares.
50 public boolean isLightLevelValid() {
51 return lightLevelValid;
55 * Raw sensor light level formula is '10000 * log10(lux + 1)' so apply the inverse formula to convert back to Lux.
56 * NOTE: the Philips/Signify API documentation quotes the formula as '10000 * log10(lux) + 1', however this code
57 * author thinks that that formula is wrong since zero Lux would cause a log10(0) negative infinity overflow!
59 * @return a QuantityType with light level in Lux, or UNDEF.
61 public State getLightLevelState() {
62 if (lightLevelValid) {
63 return new QuantityType<>(Math.pow(10f, (double) lightLevel / 10000f) - 1f, Units.LUX);
65 return UnDefType.UNDEF;
68 public State isLightLevelValidState() {
69 return OnOffType.from(lightLevelValid);
72 public @Nullable LightLevelReport getLightLevelReport() {
73 return lightLevelReport;