ST-901L Not Working on My Traccar Server (But ST-915L Works Fine)

Jaccovw5 3 days ago

strange, that is the only message i see in the logs

Jaccovw5 2 days ago

this is the full stack trace:

2026-01-25 10:06:44  INFO: [T75ba6fef] connected
2026-01-25 10:06:47  INFO: [T75ba6fef: watch < 31.161.226.37] 2a48512c373032363231313332382c56382c3037333933332c412c353132382e373437332c4e2c30303335372e303835392c452c3030302e34352c3232342c3235303132362c46424646464246462c3230342c30382c33333630322c353132303236382c382c32352c34312c31303023
2026-01-25 10:06:47  INFO: [T75ba6fef] error - 
java.lang.IndexOutOfBoundsException: readerIndex(1) + length(2) exceeds writerIndex(2): UnpooledByteBufAllocator$InstrumentedUnpooledUnsafeHeapByteBuf(ridx: 1, widx: 2, cap: 256)
	at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1442)
	at io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1428)
	at io.netty.buffer.AbstractByteBuf.readSlice(AbstractByteBuf.java:879)
	at org.traccar.protocol.WatchProtocolDecoder.decode(WatchProtocolDecoder.java:205)
	at org.traccar.ExtendedObjectDecoder.channelRead(ExtendedObjectDecoder.java:75)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.traccar.WrapperContext.fireChannelRead(WrapperContext.java:102)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:333)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:454)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
	at org.traccar.WrapperInboundHandler.channelRead(WrapperInboundHandler.java:57)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
	at org.traccar.handler.StandardLoggingHandler.channelRead(StandardLoggingHandler.java:53)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.traccar.handler.NetworkMessageHandler.channelRead(NetworkMessageHandler.java:37)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:829)
2026-01-25 10:06:47  INFO: [T75ba6fef] disconnected

Jaccovw5 2 days ago

i already know what was wrong, omg guys.
i have already a gps tracker and have this entry in the traccar.xml file:

<entry key='watch.port'>5093</entry>

that works fine for that gps tracker
so i add a second entry below it:

<entry key='watch.port'>5013</entry>

but i just scroll down in the list: <!-- // Example ports/protocols you can activate.
and i see this one:

<entry key='h02.port'>5013</entry>

that was the good one.

just that simple it sometimes can be!