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-rw-r--r--src/org/traccar/protocol/UlbotechProtocolDecoder.java4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/org/traccar/protocol/UlbotechProtocolDecoder.java b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
index 5d882ffd8..dd6fb1593 100644
--- a/src/org/traccar/protocol/UlbotechProtocolDecoder.java
+++ b/src/org/traccar/protocol/UlbotechProtocolDecoder.java
@@ -204,7 +204,9 @@ public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
case DATA_EVENT:
position.set(Event.KEY_EVENT, buf.readUnsignedByte());
- position.set("event-mask", buf.readUnsignedInt());
+ if (length > 1) {
+ position.set("event-mask", buf.readUnsignedInt());
+ }
break;
default: