V4.2.4a - check for null gatt characteristic before writing - should fix #158

app/src/main/AndroidManifest.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
-    android:versionCode="137"
-    android:versionName="4.2.3">
+    android:versionCode="138"
+    android:versionName="4.2.4a">
     <!-- android:allowBackup="false" -->
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

app/src/main/java/uk/org/openseizuredetector/SdDataSourceBLE.java

@@ -392,6 +392,7 @@ public class SdDataSourceBLE extends SdDataSource {
          * @param nBytes - number of bytes to send.
          */
         private void executeWriteCharacteristic(BluetoothGattCharacteristic gattCharacteristic, byte[] valBytes) {
+            if (gattCharacteristic != null) {
                 gattCharacteristic.setValue(valBytes);
                 boolean retVal = mBluetoothGatt.writeCharacteristic(gattCharacteristic);
                 if (retVal) {
@@ -405,6 +406,9 @@ public class SdDataSourceBLE extends SdDataSource {
                         }
                     }, 100);
                 }
+            } else {
+                Log.i(TAG,"ExecuteWriteCharacteristic() - gatCharacteristic is null, so not doing anything");
+            }
         }