diff -r ec018606c207 -r 68a4f654dc00 DHT-changeOwner.notice
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT-changeOwner.notice	Thu Jul 05 08:48:18 2018 +0000
@@ -0,0 +1,21 @@
+important!
+after recompile of the IOC, you have to set
+root as owner of the IOC-executable (bin/<arch>/kstm)
+and set the sticky bit so it will be executed as root 
+instead of local user.
+
+the DHT22 temperature & humidity sensor need root access
+for direct interaction with the GPIO pins of the 
+raspberry pi!
+
+do it as follows:
+
+######
+cd bin/linux-arm/
+sudo chown root:root kstm
+sudo chmod u+s kstm
+######
+
+check success with ls -la
+it should be marked red and have
+-r-sr-xr-x root root