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-rw-r--r--src/main/java/org/traccar/protocol/SuntechFrameDecoder.java2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java b/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java
index 7b8337468..8748ecc61 100644
--- a/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java
+++ b/src/main/java/org/traccar/protocol/SuntechFrameDecoder.java
@@ -32,7 +32,7 @@ public class SuntechFrameDecoder extends BaseFrameDecoder {
protected Object decode(
ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
- if (buf.getByte(buf.readerIndex()) == (byte) 0x81) {
+ if (buf.getByte(buf.readerIndex() + 1) == 0) {
int length = 1 + 2 + buf.getShort(buf.readerIndex() + 1);
if (buf.readableBytes() >= length) {