1 important!

     2 after recompile of the IOC, you have to set

     3 root as owner of the IOC-executable (bin/<arch>/kstm)

     4 and set the sticky bit so it will be executed as root 

     5 instead of local user.

     6 

     7 the DHT22 temperature & humidity sensor need root access

     8 for direct interaction with the GPIO pins of the 

     9 raspberry pi!

    10 

    11 do it as follows:

    12 

    13 ######

    14 cd bin/linux-arm/

    15 sudo chown root:root kstm

    16 sudo chmod u+s kstm

    17 ######

    18 

    19 check success with ls -la

    20 it should be marked red and have

    21 -r-sr-xr-x root root