Chart's wont show content, persistence is setup

Hi n_c,

THX for the reply… here’s the Item’s I want to plot:

openhab> items list
HG_Temperatur (Type=NumberItem, State=5, Label=Temperatur, Category=null)
HG_Luftdruck (Type=NumberItem, State=977.00, Label=Luftdruck, Category=null)
HG_Luftfeuchtigkeit (Type=NumberItem, State=85, Label=Luftfeuchtigkeit, Category=null)
Diesel_BN_JET (Type=NumberItem, State=NULL, Label=Diesel BN Jet, Category=null, Groups=[diesel_group])
Diesel_BN_AVIA (Type=NumberItem, State=NULL, Label=Diesel BN AVIA, Category=null, Groups=[diesel_group])
diesel_group (Type=GroupItem, Members=2, State=NULL, Label=Diesel, Category=car)

And this is the related rrd4j.persist file:

// persistence strategies have a name and a definition and are referred to in the "Items" section


Strategies {
   everyMinute	: "0 * * * * ?"
   everyHour    : "0 0 * * * ?"
   everyDay     : "0 0 0 * * ?"
   default = everyChange
}


Items {
   HG_Luftdruck : strategy = everyMinute, restoreOnStartup
   HG_Luftfeuchtigkeit : strategy = everyMinute, restoreOnStartup
   HG_Temperatur : strategy = everyMinute, restoreOnStartup
   Diesel_BN_JET : strate`Preformatted text`gy = everyHour, restoreOnStartup
   Diesel_BN_AVIA : strategy = everyHour, restoreOnStartup
}

But how do I use the REST API to check the stored data?

EDIT: found this topic and from there tried to adopt the URL:

http://hab:8080/rest/persistence/items/ItemDiesel_BN_JET?serviceId=rrd4j&starttime=2018-13-03T12%3A00%3A00.000