@chris-1 So hier die Lösung:
Der JSONATA Ausdruck erzeugt ein neues Objekt mit den Attributen key und value auf dass Du dann normal mit den Blockly Attributen zugreifen kannst.
Der JSONATA Ausdruck lautet:
$.$sift(function($v, $k) {$k ~> /^EF00\/02/}){"key": $keys(),"value":$.*}
Hier das Ganze zum Import und Testen
Spoiler
<xml xmlns="https://developers.google.com/blockly/xml">
<variables>
<variable id=";po#/$v(8.UbHdHNkx[6">Objekt</variable>
</variables>
<block type="variables_set" id="W@hg1tE.68iwuYzK2!uN" x="-1263" y="-835">
<field name="VAR" id=";po#/$v(8.UbHdHNkx[6">Objekt</field>
<value name="VALUE">
<block type="convert_json2object" id="(0IX6:]p|*y3zL7||zBw">
<value name="VALUE">
<block type="text" id="cj9Q,eiBn6QVld(V7kV2">
<field name="TEXT">{"Device":"0x0D73","EF00/0214":83,"Endpoint":1,"LinkQuality":136}</field>
</block>
</value>
</block>
</value>
<next>
<block type="variables_set" id="9+M],oEz;U^a+N[vt#`g">
<field name="VAR" id=";po#/$v(8.UbHdHNkx[6">Objekt</field>
<value name="VALUE">
<block type="convert_jsonata" id="N^%KxZ{%,3GmzsQvn+c(">
<value name="EXPRESSION">
<shadow type="text" id="g]4!|~f.(-MAU?:dXi)?">
<field name="TEXT">$.$sift(function($v, $k) {$k ~> /^EF00\/02/}){"key": $keys(),"value":$.*}</field>
</shadow>
</value>
<value name="TARGET">
<block type="variables_get" id="70c4ESN`7hWTUT-(49y!">
<field name="VAR" id=";po#/$v(8.UbHdHNkx[6">Objekt</field>
</block>
</value>
</block>
</value>
<next>
<block type="debug" id="n7%]r/8E9.7*=Yc/SwqD">
<field name="Severity">log</field>
<value name="TEXT">
<shadow type="text" id="_OZ+{6nC[=m9DhEs.K[]">
<field name="TEXT">test</field>
</shadow>
<block type="variables_get" id="-Q_F|i0gY.V`q1:_DGZj">
<field name="VAR" id=";po#/$v(8.UbHdHNkx[6">Objekt</field>
</block>
</value>
<next>
<block type="debug" id="$mUXBli_e}bd4hA?t2Ls">
<field name="Severity">log</field>
<value name="TEXT">
<shadow type="text" id="+:$J:sSMpe_Z8M4p0YYN">
<field name="TEXT">test</field>
</shadow>
<block type="get_attr" id="s8LY=qPscr-My@k|c-.l">
<value name="PATH">
<shadow type="text" id="[}UnHmrmR:{xN!J)0KlB">
<field name="TEXT">key</field>
</shadow>
</value>
<value name="OBJECT">
<block type="variables_get" id="R_[5TjBBSEIu*I=Xk-SJ">
<field name="VAR" id=";po#/$v(8.UbHdHNkx[6">Objekt</field>
</block>
</value>
</block>
</value>
<next>
<block type="debug" id="$|g.Yy_[6Qity9{lgt{#">
<field name="Severity">log</field>
<value name="TEXT">
<shadow type="text" id="3Ym?y,.KIM6gAqn4!z4e">
<field name="TEXT">test</field>
</shadow>
<block type="get_attr" id="d_i|9]ucU.,jP7d;WRR)">
<value name="PATH">
<shadow type="text" id=",eAl@_h]7=Nna@c5r-3t">
<field name="TEXT">value</field>
</shadow>
</value>
<value name="OBJECT">
<block type="variables_get" id="r|%-}(FGnhMNQwQaC/rH">
<field name="VAR" id=";po#/$v(8.UbHdHNkx[6">Objekt</field>
</block>
</value>
</block>
</value>
</block>
</next>
</block>
</next>
</block>
</next>
</block>
</next>
</block>
</xml>