Thanks @TimO , seems is working fine. I updated my installation with the new jar and now CPU is around 4-6%. Thanks a lot. By the way, I did not see a commit in the code repository.

@TimO I would say at a glance, that the thread is continuously reading the Serial port, with out a break, so this must be very CPU consuming?

Is any bodoy having high CPU load with this binding? My setup is: Openhab 2.0, running on a Pi3, with Java SDK Oracle. Openhab is running +100% CPU all the time. Here is the output of top command:

top - 19:54:33 up  9:19,  1 user,  load average: 0.98, 1.01, 1.03
Tasks: 153 total,   1 running, 152 sleeping,   0 stopped,   0 zombie
%Cpu(s): 21.4 us,  4.2 sy,  0.0 ni, 74.4 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem :   948056 total,   112832 free,   325232 used,   509992 buff/cache
KiB Swap:        0 total,        0 free,        0 used.   573692 avail Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
 3919 root      20   0  455068 180668  14280 S 101.3 19.1 547:33.46 java
28144 root      20   0    8436   2840   2280 R   0.7  0.3   0:06.30 top
  368 root      20   0    1448     88     16 S   0.3  0.0   0:31.75 rngd

If I look all the threats with command

ps -Lp 3919

I can see one that is eating too much CPU:

 3919  4226 ?        08:25:13 java

and looking at this one in the output of a thread dump: (4226 DEC = 1082 HEX)

Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: "pool-41-thread-1" #273 prio=5 os_prio=0 tid=0x62addc00 **nid=0x1082** runnable [0x5d6be000]
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]:    java.lang.Thread.State: RUNNABLE
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at gnu.io.RXTXPort.nativeavailable(Native Method)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at gnu.io.RXTXPort$SerialInputStream.available(RXTXPort.java:1568)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011- locked <0x6afb81f8> (a gnu.io.RXTXPort$SerialInputStream)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at sun.nio.cs.StreamDecoder.inReady(StreamDecoder.java:363)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at sun.nio.cs.StreamDecoder.implReady(StreamDecoder.java:371)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at sun.nio.cs.StreamDecoder.ready(StreamDecoder.java:185)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011- locked <0x6b2a41e8> (a java.io.InputStreamReader)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at java.io.InputStreamReader.ready(InputStreamReader.java:195)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at java.io.BufferedReader.ready(BufferedReader.java:463)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011- locked <0x6b2a41e8> (a java.io.InputStreamReader)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at org.openhab.binding.mysensors.protocol.MySensorsReader.run(MySensorsReader.java:50)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at java.util.concurrent.FutureTask.run(FutureTask.java:266)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
Jun  1 19:30:31 avinaz-pi3 start.sh[3822]: #011at java.lang.Thread.run(Thread.java:745)

You can see that is related to org.openhab.binding.mysensors.protocol.MySensorsReader.run(MySensorsReader.java:50)

Any ideas?