diff --git a/CHANGES.md b/CHANGES.md
index 400e99ae2..debc2dfbf 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,6 @@
+# HAP-Java 2.0.2
+ * Various minor stability issues for after an accessory has been removed.
+
 # HAP-Java 2.0.1
 ## Fixes
 * Log accessory names instead of futures. [#150](https://github.com/hap-java/HAP-Java/issues/150)
diff --git a/src/main/java/io/github/hapjava/characteristics/impl/base/BaseCharacteristic.java b/src/main/java/io/github/hapjava/characteristics/impl/base/BaseCharacteristic.java
index a90f1fadc..77b0bc452 100644
--- a/src/main/java/io/github/hapjava/characteristics/impl/base/BaseCharacteristic.java
+++ b/src/main/java/io/github/hapjava/characteristics/impl/base/BaseCharacteristic.java
@@ -125,15 +125,26 @@ public final void setValue(JsonValue jsonValue) {
     try {
       setValue(convert(jsonValue));
     } catch (Exception e) {
-      logger.warn("Error while setting JSON value", e);
+      logger.warn(
+          "Error while setting JSON value {} for characteristic {}",
+          jsonValue,
+          getClass().getName(),
+          e);
     }
   }
 
   /** {@inheritDoc} */
   @Override
   public void supplyValue(JsonObjectBuilder builder) {
+    CompletableFuture<T> futureValue = getValue();
+
+    if (futureValue == null) {
+      setJsonValue(builder, getDefault());
+      return;
+    }
+
     try {
-      setJsonValue(builder, getValue().get());
+      setJsonValue(builder, futureValue.get());
     } catch (InterruptedException | ExecutionException e) {
       logger.warn("Error retrieving value", e);
       setJsonValue(builder, getDefault());
@@ -143,13 +154,13 @@ public void supplyValue(JsonObjectBuilder builder) {
   /** {@inheritDoc} */
   @Override
   public void subscribe(HomekitCharacteristicChangeCallback callback) {
-    subscriber.get().accept(callback);
+    subscriber.ifPresent(s -> s.accept(callback));
   }
 
   /** {@inheritDoc} */
   @Override
   public void unsubscribe() {
-    unsubscriber.get().run();
+    unsubscriber.ifPresent(u -> u.run());
   }
 
   /**
@@ -181,7 +192,7 @@ public void unsubscribe() {
    *
    * @return a sensible default value.
    */
-  protected abstract T getDefault();
+  public abstract T getDefault();
 
   /**
    * Writes the value key to the serialized characteristic
diff --git a/src/main/java/io/github/hapjava/characteristics/impl/base/BooleanCharacteristic.java b/src/main/java/io/github/hapjava/characteristics/impl/base/BooleanCharacteristic.java
index 83d7f765a..3e07936a8 100644
--- a/src/main/java/io/github/hapjava/characteristics/impl/base/BooleanCharacteristic.java
+++ b/src/main/java/io/github/hapjava/characteristics/impl/base/BooleanCharacteristic.java
@@ -71,7 +71,7 @@ protected void setValue(Boolean value) throws Exception {
 
   /** {@inheritDoc} */
   @Override
-  protected Boolean getDefault() {
+  public Boolean getDefault() {
     return false;
   }
 }
diff --git a/src/main/java/io/github/hapjava/characteristics/impl/base/EnumCharacteristic.java b/src/main/java/io/github/hapjava/characteristics/impl/base/EnumCharacteristic.java
index f983efe16..df3287de5 100644
--- a/src/main/java/io/github/hapjava/characteristics/impl/base/EnumCharacteristic.java
+++ b/src/main/java/io/github/hapjava/characteristics/impl/base/EnumCharacteristic.java
@@ -111,7 +111,7 @@ protected void setValue(Integer value) throws Exception {
 
   /** {@inheritDoc} */
   @Override
-  protected Integer getDefault() {
+  public Integer getDefault() {
     // as default return first item from valid values
     if (validValues != null && validValues.length > 0) {
       return validValues[0].getCode();
diff --git a/src/main/java/io/github/hapjava/characteristics/impl/base/FloatCharacteristic.java b/src/main/java/io/github/hapjava/characteristics/impl/base/FloatCharacteristic.java
index e15da4fde..a8a98dc27 100644
--- a/src/main/java/io/github/hapjava/characteristics/impl/base/FloatCharacteristic.java
+++ b/src/main/java/io/github/hapjava/characteristics/impl/base/FloatCharacteristic.java
@@ -130,12 +130,12 @@ protected final CompletableFuture<Double> getValue() {
 
   @Override
   protected void setValue(Double value) throws Exception {
-    setter.get().accept(value);
+    if (setter.isPresent()) setter.get().accept(value);
   }
 
   /** {@inheritDoc} */
   @Override
-  protected Double getDefault() {
+  public Double getDefault() {
     return minValue;
   }
 }
diff --git a/src/main/java/io/github/hapjava/characteristics/impl/base/IntegerCharacteristic.java b/src/main/java/io/github/hapjava/characteristics/impl/base/IntegerCharacteristic.java
index fcd804ccd..22a6dce83 100644
--- a/src/main/java/io/github/hapjava/characteristics/impl/base/IntegerCharacteristic.java
+++ b/src/main/java/io/github/hapjava/characteristics/impl/base/IntegerCharacteristic.java
@@ -77,12 +77,12 @@ protected CompletableFuture<Integer> getValue() {
 
   @Override
   protected void setValue(Integer value) throws Exception {
-    setter.get().accept(value);
+    if (setter.isPresent()) setter.get().accept(value);
   }
 
   /** {@inheritDoc} */
   @Override
-  protected Integer getDefault() {
+  public Integer getDefault() {
     return minValue;
   }
 
diff --git a/src/main/java/io/github/hapjava/characteristics/impl/base/StaticStringCharacteristic.java b/src/main/java/io/github/hapjava/characteristics/impl/base/StaticStringCharacteristic.java
index d5de2f9ce..576df7e0e 100644
--- a/src/main/java/io/github/hapjava/characteristics/impl/base/StaticStringCharacteristic.java
+++ b/src/main/java/io/github/hapjava/characteristics/impl/base/StaticStringCharacteristic.java
@@ -60,12 +60,12 @@ public void setValue(String value) throws Exception {
   /** {@inheritDoc} */
   @Override
   protected CompletableFuture<String> getValue() {
-    return getter.map(stringGetter -> stringGetter.get()).get();
+    return getter.map(stringGetter -> stringGetter.get()).orElse(null);
   }
 
   /** {@inheritDoc} */
   @Override
-  protected String getDefault() {
+  public String getDefault() {
     return "Unknown";
   }
 }
diff --git a/src/main/java/io/github/hapjava/characteristics/impl/base/StringCharacteristic.java b/src/main/java/io/github/hapjava/characteristics/impl/base/StringCharacteristic.java
index 4373b06c9..65cf45a71 100644
--- a/src/main/java/io/github/hapjava/characteristics/impl/base/StringCharacteristic.java
+++ b/src/main/java/io/github/hapjava/characteristics/impl/base/StringCharacteristic.java
@@ -63,18 +63,18 @@ public String convert(JsonValue jsonValue) {
   /** {@inheritDoc} */
   @Override
   public void setValue(String value) throws Exception {
-    setter.get().accept(value);
+    if (setter.isPresent()) setter.get().accept(value);
   }
 
   /** {@inheritDoc} */
   @Override
   protected CompletableFuture<String> getValue() {
-    return getter.map(stringGetter -> stringGetter.get()).get();
+    return getter.map(stringGetter -> stringGetter.get()).orElse(null);
   }
 
   /** {@inheritDoc} */
   @Override
-  protected String getDefault() {
+  public String getDefault() {
     return "Unknown";
   }
 }
diff --git a/src/main/java/io/github/hapjava/characteristics/impl/lightbulb/ColorTemperatureCharacteristic.java b/src/main/java/io/github/hapjava/characteristics/impl/lightbulb/ColorTemperatureCharacteristic.java
index 12886c7a1..987ab5eee 100644
--- a/src/main/java/io/github/hapjava/characteristics/impl/lightbulb/ColorTemperatureCharacteristic.java
+++ b/src/main/java/io/github/hapjava/characteristics/impl/lightbulb/ColorTemperatureCharacteristic.java
@@ -9,7 +9,7 @@
 import java.util.function.Consumer;
 import java.util.function.Supplier;
 
-/** This characteristic describes color temperature in Kelvin */
+/** This characteristic describes color temperature in mireds */
 public class ColorTemperatureCharacteristic extends IntegerCharacteristic
     implements EventableCharacteristic {
   public static final int DEFAULT_MIN_VALUE = 50;
@@ -27,7 +27,7 @@ public ColorTemperatureCharacteristic(
         "color temperature",
         minValue,
         maxValue,
-        "K",
+        "mired",
         Optional.of(getter),
         Optional.of(setter),
         Optional.of(subscriber),
diff --git a/src/main/java/io/github/hapjava/server/impl/json/CharacteristicsController.java b/src/main/java/io/github/hapjava/server/impl/json/CharacteristicsController.java
index 4d20a0c6b..d061a11fc 100644
--- a/src/main/java/io/github/hapjava/server/impl/json/CharacteristicsController.java
+++ b/src/main/java/io/github/hapjava/server/impl/json/CharacteristicsController.java
@@ -51,7 +51,7 @@ public HttpResponse get(HttpRequest request) throws Exception {
           characteristics.add(characteristic.add("aid", aid).add("iid", iid).build());
         } else {
           logger.warn(
-              "Accessory " + aid + " does not have characteristic " + iid + "Request: " + uri);
+              "Accessory " + aid + " does not have characteristic " + iid + ". Request: " + uri);
         }
       } else {
         logger.warn(
@@ -77,7 +77,16 @@ public HttpResponse put(HttpRequest request, HomekitClientConnection connection)
           JsonObject jsonCharacteristic = (JsonObject) value;
           int aid = jsonCharacteristic.getInt("aid");
           int iid = jsonCharacteristic.getInt("iid");
-          Characteristic characteristic = registry.getCharacteristics(aid).get(iid);
+          Map<Integer, Characteristic> accessory = registry.getCharacteristics(aid);
+          if (accessory.isEmpty()) {
+            logger.warn("Accessory {} has no characteristics or does not exist.", aid);
+            return new HapJsonNoContentResponse();
+          }
+          Characteristic characteristic = accessory.get(iid);
+          if (characteristic == null) {
+            logger.warn("Accessory {} does not have characteristic {}.", aid, iid);
+            return new HapJsonNoContentResponse();
+          }
 
           if (jsonCharacteristic.containsKey("value")) {
             characteristic.setValue(jsonCharacteristic.get("value"));