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.dto.clip2;
15 import org.eclipse.jdt.annotation.NonNullByDefault;
16 import org.openhab.core.library.types.OnOffType;
17 import org.openhab.core.library.types.QuantityType;
18 import org.openhab.core.library.unit.Units;
19 import org.openhab.core.types.State;
20 import org.openhab.core.types.UnDefType;
22 import com.google.gson.annotations.SerializedName;
25 * DTO for CLIP 2 light level sensor.
27 * @author Andrew Fiddian-Green - Initial contribution
30 public class LightLevel {
31 private @SerializedName("light_level") int lightLevel;
32 private @SerializedName("light_level_valid") boolean lightLevelValid;
34 public int getLightLevel() {
38 public boolean isLightLevelValid() {
39 return lightLevelValid;
43 * Raw sensor light level formula is '10000 * log10(lux + 1)' so apply the inverse formula to convert back to Lux.
44 * NOTE: the Philips/Signify API documentation quotes the formula as '10000 * log10(lux) + 1', however this code
45 * author thinks that that formula is wrong since zero Lux would cause a log10(0) negative infinity overflow!
47 * @return a QuantityType with light level in Lux, or UNDEF.
49 public State getLightLevelState() {
50 if (lightLevelValid) {
51 return new QuantityType<>(Math.pow(10f, (double) lightLevel / 10000f) - 1f, Units.LUX);
53 return UnDefType.UNDEF;
56 public State isLightLevelValidState() {
57 return OnOffType.from(lightLevelValid);