This simple flow is used to set global variables on startup.
[ { "id": "fcbf6cdd.df1e2", "type": "inject", "z": "2e4673e7.251b2c", "name": "Trigger on Start", "topic": "", "payload": "true", "payloadType": "bool", "repeat": "", "crontab": "", "once": true, "onceDelay": "", "x": 160, "y": 100, "wires": [ [ "a33badfe.289c4" ] ] }, { "id": "a33badfe.289c4", "type": "function", "z": "2e4673e7.251b2c", "name": "Set Global Variables", "func": "global.set(\"assetId\", \"ANExample\")\n\nreturn msg;", "outputs": 1, "noerr": 0, "x": 420, "y": 100, "wires": [ [] ] } ]