I recently installed an "Ubuntu 16.04 LTS" on a Raspberry 3 fully upgraded to evaluate some Z-Wave devices functionality. Now I see a high readKey load (15-20%) all around the clock which is not ok IMHO. What is it responsible for and is there a chance to get the reason of its running? The PPID is 1 by the way.

I can kill the process without losing any functionality which I am using.

  • The PPID is 1 because it is a service started by init, which is true of most or all background processes post-boot.
    – goldilocks
    Jul 6, 2016 at 8:53

1 Answer 1


It's part of z-way-server AFAIK. You may have installed it with the z-way installation script.

EDIT: take a look at /etc/init.d/readKey script for details.

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