Hier ist ein „Flow“, um die Werte eines Photovoltaik-Inverters von Kostal per Node-Red auszulesen und zusätzlich als MQTT-Nachrichten zu versenden.
Der Hintergrund ist, dass die Anlage nicht per SNMP oder ähnlich gängigen Verfahren auszulesen war, sondern nur über eine Webseite die Werte anzeigte. Zwar gibt es eine Software, aber die hat meine Wünsche nicht wirklich erfüllt.
Mit diesem Flow ist es möglich, die aktuelle Leistung einer PV-Anlage aktiv alle z.B. 20 Sekunden abzufragen, und die gelieferten Werte als Diagramm im Dashboard darzustellen.
Zur Langzeitvisualisierung versende ich die Werte zusätzlich an ein weiteres System (Zabbix). Das sieht dann so aus:
Und hier kommt der „Flow“-Code:
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