Last data as data los timestamp in "offline mode"

yabl/protocol.go

@@ -156,6 +156,14 @@ func (c *converter) CheckTimeouts(isOffline bool) ([]*Event, bool) {
 					Value:      nil,
 				}
 
+				if isOffline {
+					// last received data
+					event.Updated = fld.last
+				} else {
+					// actual detection moment
+					event.Updated = &now
+				}
+
 				var mask uint64 = ^(ALL_BITS << fld.length)
 				mask = mask << from
 				fld.value = mask