Do not duplicate code
Do not duplicate code

Make the tutorial shorter and more high-level (beforeRead => updateTime).

open62541/open62541,jpfr/open62541,jpfr/open62541,JGrothoff/open62541,open62541/open62541,JGrothoff/open62541,StalderT/open62541,JGrothoff/open62541,StalderT/open62541,open62541/open62541,open62541/open62541,jpfr/open62541,StalderT/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541