Node-Red Tutorial-Reihe - Part 9: Daten von FHEM per JsonList holen
In einem früheren Video habe ich ja bereits gezeigt, wie man über einen generischen Weg per MQTT die Daten in NodeRed aktualisieren kann. Was wäre aber, wenn man kein MQTT hat oder extra nutzen möchte, und trotzdem Informationen aus FHEM holen will? Dann bietet sich der Weg über ein FHEM-Modul namens JsonList2 an. Dieses liefert die aktuellen Readings und deren Wert im Json-Format aus. In NdeRed lieben wir JSON, da man damit extrem einfach weiter arbeiten kann. Wie genau das geht, zeige ich DIr in diesem Video.
Was wird benötigt?
- Eine Node-Red-Installation
- Eine FHEM-Installation
Video
Beispiel-Flow zum importieren
[
{
"id": "fb6b67f4.d7aee8",
"type": "subflow",
"name": "Von FHEM",
"info": "",
"in": [
{
"x": 60,
"y": 60,
"wires": [
{
"id": "3f754c77.b2f4d4"
}
]
}
],
"out": [
{
"x": 1160,
"y": 40,
"wires": [
{
"id": "a4b7a456.c9ab38",
"port": 0
}
]
},
{
"x": 920,
"y": 140,
"wires": [
{
"id": "1e2f55f6.75270a",
"port": 0
}
]
}
]
},
{
"id": "12b059a2.82d646",
"type": "http request",
"z": "fb6b67f4.d7aee8",
"name": "",
"method": "GET",
"ret": "txt",
"url": "",
"tls": "",
"x": 470,
"y": 60,
"wires": [
[
"925db50c.7dc158"
]
]
},
{
"id": "3f754c77.b2f4d4",
"type": "function",
"z": "fb6b67f4.d7aee8",
"name": "Jsonlist",
"func": "msg.url = 'http://fhem:8083/fhem?cmd=jsonlist2%20' + msg.payload + '&XHR=1';\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 300,
"y": 60,
"wires": [
[
"12b059a2.82d646"
]
]
},
{
"id": "925db50c.7dc158",
"type": "json",
"z": "fb6b67f4.d7aee8",
"name": "",
"property": "payload",
"action": "",
"pretty": false,
"x": 610,
"y": 60,
"wires": [
[
"d8ccb083.5b964",
"1e2f55f6.75270a"
]
]
},
{
"id": "d8ccb083.5b964",
"type": "switch",
"z": "fb6b67f4.d7aee8",
"name": "Ergebnisse",
"property": "payload.totalResultsReturned",
"propertyType": "msg",
"rules": [
{
"t": "gte",
"v": "1",
"vt": "num"
},
{
"t": "else"
}
],
"checkall": "false",
"repair": false,
"outputs": 2,
"x": 770,
"y": 60,
"wires": [
[
"a4b7a456.c9ab38"
],
[
"34783fbd.68f6a"
]
]
},
{
"id": "a4b7a456.c9ab38",
"type": "function",
"z": "fb6b67f4.d7aee8",
"name": "Erstes Element holen",
"func": "msg.payload = msg.payload.Results[0];\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 1020,
"y": 40,
"wires": [
[]
]
},
{
"id": "1e2f55f6.75270a",
"type": "function",
"z": "fb6b67f4.d7aee8",
"name": "Anzahl Ergebnisse",
"func": "msg.payload = msg.payload.totalResultsReturned;\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 790,
"y": 140,
"wires": [
[]
]
},
{
"id": "34783fbd.68f6a",
"type": "function",
"z": "fb6b67f4.d7aee8",
"name": "Fehler, keine Geräte",
"func": "msg.payload = 'Keine Geräte gefunden';\nnode.error(\"Keine Geräte gefunden\", msg);",
"outputs": 1,
"noerr": 0,
"x": 1020,
"y": 80,
"wires": [
[]
]
},
{
"id": "9023e543.753388",
"type": "subflow:fb6b67f4.d7aee8",
"z": "bf5eeb85.d24f28",
"name": "",
"x": 310,
"y": 1500,
"wires": [
[
"dd5a729a.e965"
],
[]
]
}
]
