Fix string property change notifications. (#111)

Fixes #2479

Author: mrstegeman

Thing.h

@@ -226,6 +226,11 @@ class ThingItem {
     this->hasChanged = true;
   }
 
+  void setValue(const char *s) {
+    *(this->getValue().string) = s;
+    this->hasChanged = true;
+  }
+
   /**
    * Returns the property value if it has been changed via {@link setValue}
    * since the last call or returns a nullptr.
@@ -603,7 +608,7 @@ class ThingDevice {
       break;
     }
     case STRING:
-      *(property->getValue().string) = newValue.as<String>();
+      property->setValue(newValue.as<const char *>());
       property->changed(property->getValue());
       break;
     }

examples/AsyncProperty/AsyncProperty.ino

@@ -3,6 +3,8 @@
  * thing-url-adapter.
  */
 
+#define LARGE_JSON_BUFFERS 1
+
 #include <Arduino.h>
 #include <Thing.h>
 #include <WebThingAdapter.h>

examples/BME280/BME280.ino

@@ -27,6 +27,8 @@
  updates: dh, kg 2018
  */
 
+#define LARGE_JSON_BUFFERS 1
+
 #include <Arduino.h>
 #include <BME280.h>
 #include <BME280I2C.h>

examples/RGBLamp/RGBLamp.ino

@@ -10,6 +10,8 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
+#define LARGE_JSON_BUFFERS 1
+
 #include <Arduino.h>
 #include <Thing.h>
 #include <WebThingAdapter.h>

library.json

@@ -2,7 +2,7 @@
     "name": "webthing-arduino",
     "description": "A library for creating Web Things using the Web of Things API. Runs on ESP8266, ESP32, Ethernet, and WiFi101-compatible boards. Compatible with the Mozilla WebThings Gateway.",
     "keywords": "Communication",
-    "version": "0.11.2",
+    "version": "0.11.3",
     "authors": {
         "name": "Mozilla IoT <iot@mozilla.com>"
     },

library.properties

@@ -1,5 +1,5 @@
 name=webthing-arduino
-version=0.11.2
+version=0.11.3
 author=Mozilla IoT <iot@mozilla.com>
 maintainer=James Hobin <hobinjk@gmail.com>
 sentence=A library for creating Web Things using the Web of Things API