Vor dem Anfang
Sie sollten Node-Red bereits mit dem Moment-Knoten installiert haben. Verschiedene Installationsmethoden sind auf der Entwickler - Website beschrieben /nodered.org/docs/getting-started /
Import der Fluss Code in Ihre Node-RED , und Sie werden alle Knoten , wie im Bild haben
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Downtime: ' + downtimenow + 'min #myhost' ;\nreturn msg;","outputs":1,"noerr":0,"x":1640,"y":500,"wires":[["4c032cf4.424084","4c25ef47.71b94"]]},{"id":"e3f88e59.88023","type":"trigger","z":"c20c2bf8.f5bba8","op1":"","op2":"","op1type":"pay","op2type":"pay","duration":"0","extend":true,"units":"min","reset":"reset","bytopic":"all","name":"","x":1360,"y":420,"wires":[["e24a68a2.c83f58"]]},{"id":"300022a2.3d497e","type":"trigger","z":"c20c2bf8.f5bba8","op1":"","op2":"","op1type":"pay","op2type":"pay","duration":"0","extend":true,"units":"min","reset":"reset","bytopic":"all","name":"","x":1360,"y":620,"wires":[["419d4a24.ec1604","11c46064.1ffc7"]]},{"id":"aac1daf2.c77e18","type":"function","z":"c20c2bf8.f5bba8","name":"send reset","func":"\nreturn {\n payload: `reset`\n}","outputs":1,"noerr":0,"x":1150,"y":540,"wires":[["e3f88e59.88023"]]},{"id":"59f336.30325ccc","type":"function","z":"c20c2bf8.f5bba8","name":"send reset","func":"\nreturn {\n payload: `reset`\n}","outputs":1,"noerr":0,"x":1150,"y":480,"wires":[["300022a2.3d497e"]]},{"id":"5a06f9e1.e303d8","type":"counter","z":"c20c2bf8.f5bba8","name":"count to 10","init":"0","step":"1","lower":"0","upper":"10","mode":"increment","outputs":1,"x":690,"y":660,"wires":[["e93a8fe8.8bb23"]]},{"id":"323380d1.a71af","type":"switch","z":"c20c2bf8.f5bba8","name":"if its 3","property":"count","propertyType":"msg","rules":[{"t":"eq","v":"3","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":990,"y":660,"wires":[["d5bf4f53.b8ae2","aac1daf2.c77e18"]]},{"id":"24d1969a.a4e5da","type":"function","z":"c20c2bf8.f5bba8","name":"reset counter","func":"msg.reset = true; return msg","outputs":1,"noerr":0,"x":890,"y":440,"wires":[["5a06f9e1.e303d8"]]},{"id":"834b9f2b.cfb89","type":"counter","z":"c20c2bf8.f5bba8","name":"count to 10","init":"0","step":"1","lower":"0","upper":"10","mode":"increment","outputs":1,"x":670,"y":380,"wires":[["641f8b3.143cd74"]]},{"id":"440de7c7.eb6d48","type":"function","z":"c20c2bf8.f5bba8","name":"reset counter","func":"msg.reset = true; return msg","outputs":1,"noerr":0,"x":850,"y":580,"wires":[["834b9f2b.cfb89"]]},{"id":"1b410fb8.f2e8b","type":"switch","z":"c20c2bf8.f5bba8","name":"if its 5","property":"count","propertyType":"msg","rules":[{"t":"eq","v":"5","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":990,"y":380,"wires":[["107dec81.7d3953","59f336.30325ccc"]]},{"id":"641f8b3.143cd74","type":"switch","z":"c20c2bf8.f5bba8","name":"it its > 0","property":"count","propertyType":"msg","rules":[{"t":"gt","v":"0","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":840,"y":380,"wires":[["24d1969a.a4e5da","1b410fb8.f2e8b"]]},{"id":"e93a8fe8.8bb23","type":"switch","z":"c20c2bf8.f5bba8","name":"it its > 0","property":"count","propertyType":"msg","rules":[{"t":"gt","v":"0","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":840,"y":660,"wires":[["323380d1.a71af","440de7c7.eb6d48"]]},{"id":"e24a68a2.c83f58","type":"switch","z":"c20c2bf8.f5bba8","name":"not a on start web up message","property":"payload","propertyType":"msg","rules":[{"t":"neq","v":"Started!","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":1650,"y":420,"wires":[["834e384f.425cb8"]]},{"id":"2ef6b867.dd9328","type":"inject","z":"c20c2bf8.f5bba8","name":"","topic":"","payload":"Started!","payloadType":"str","repeat":"","crontab":"","once":true,"onceDelay":"","x":240,"y":160,"wires":[["e3f88e59.88023","24d1969a.a4e5da","440de7c7.eb6d48"]]},{"id":"f3ac9999.c58e48","type":"switch","z":"c20c2bf8.f5bba8","name":"Check if my Internet is up","property":"statusCode","propertyType":"msg","rules":[{"t":"eq","v":"200","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":230,"y":420,"wires":[["fa2dd78f.64ef58"]]},{"id":"aa173003.800e9","type":"http request","z":"c20c2bf8.f5bba8","name":"google.com","method":"GET","ret":"txt","url":"https://www.google.com/","tls":"","x":210,"y":320,"wires":[["f3ac9999.c58e48"]]},{"id":"cc3ecdf3.6ce24","type":"counter","z":"c20c2bf8.f5bba8","name":"count to 3000","init":"3","step":"1","lower":"0","upper":"3000","mode":"increment","outputs":1,"x":1360,"y":160,"wires":[["aeda28f4.55d248"]]},{"id":"419d4a24.ec1604","type":"function","z":"c20c2bf8.f5bba8","name":"reset counter","func":"msg.reset = true; return msg","outputs":1,"noerr":0,"x":1370,"y":240,"wires":[["cc3ecdf3.6ce24"]]},{"id":"e540e4d1.e10a98","type":"file","z":"c20c2bf8.f5bba8","name":"Write www.log","filename":"/root/iot_data/www.log","appendNewline":true,"createDir":false,"overwriteFile":"false","x":1820,"y":600,"wires":[[]]},{"id":"11c46064.1ffc7","type":"function","z":"c20c2bf8.f5bba8","name":"Add time to data","func":"var timenow=flow.get('time');\nmsg.payload = msg.payload + ' ' + timenow + ' #myhost';\nreturn msg;","outputs":1,"noerr":0,"x":1600,"y":620,"wires":[["e540e4d1.e10a98","c51c74c3.bdf448"]]},{"id":"aeda28f4.55d248","type":"function","z":"c20c2bf8.f5bba8","name":"Set downmin","func":"flow.set(\"downmin\", msg.count);","outputs":1,"noerr":0,"x":1550,"y":160,"wires":[[]]},{"id":"c51c74c3.bdf448","type":"twitter out","z":"c20c2bf8.f5bba8","twitter":"","name":"Tweet","x":1790,"y":640,"wires":[]},{"id":"4c25ef47.71b94","type":"twitter out","z":"c20c2bf8.f5bba8","twitter":"","name":"Tweet","x":1790,"y":520,"wires":[]}]Was macht dieser Fluss?
- Überprüft, ob ein Internetzugang vorhanden ist
- Überprüft, ob Zugriff auf die Site besteht
- Wenn kein Zugriff / wiederhergestellter Tweet darüber
- Zählt, wie lange die Site inaktiv war
- Schreibt ein Protokoll in eine Datei
Was muss konfiguriert werden
- Knoten 1: Sie müssen die Standortadresse für die Überwachung schreiben
- Knoten 2: Sie müssen den ersten Teil des Textes für den Tweet festlegen
- Knoten 3: Hier werden temporäre Daten zum Tweet hinzugefügt. Sie können auch Ihren eigenen Text hinzufügen
- - Knoten 4: Hier müssen Sie nach den Änderungen Ihr Twitter-Konto und den Ordner für die Protokolldatei festlegen. Vergessen Sie nicht, auf Bereitstellen zu klicken
Wie es funktioniert
Wir beginnen oben links
- Knoten [Zeitstempel] - schreibt die Zeit in die Zeitvariable
- Knoten [Gestartet!] - setzt die Ereigniszähler beim Start zurück und setzt Trigger
- Knoten [1 min] - Startet den Überwachungsprozess jede Minute.
Zunächst prüfen wir, ob die Internetknoten [google.com]> [Überprüfen, ob mein Internet aktiv ist], wenn wir eine Antwort von 200 erhalten, das Internet für uns funktioniert. Wenn nicht, funktioniert entweder das Internet für uns nicht oder google.com legt sich hin.
Als nächstes überprüfen wir unsere site [name.com]> ([gefundenes Wort im Web] [nicht 200 Antworten]). Hier können wir nicht nur auf eine Antwort von 200 warten, sondern sie kann auch von Stub-Seiten ausgegeben werden (z. B. Nichtzahlung für das Hosting). Daher gilt die Website als funktionsfähig, wenn in ihrem Inhalt ein Wort gefunden wird. Ich habe diese Google-ID. Wenn es keine Antwort 200 gibt (die Site funktioniert überhaupt nicht oder gibt 404 Fehler usw. aus), gehen wir davon aus, dass die Site nicht funktioniert.
Als nächstes beginnen wir mit dem Zählen dieser Ereignisse. Wenn 3 Nachrichten über eine nicht betriebsbereite Site hintereinander eingehen, wird sie an den Trigger weitergeleitet, der eine Nachricht überspringt und blockiert, sodass nicht viele Tweets über dieselbe Nachricht vorhanden sind. Damit der Auslöser einen Tweet sendet, der funktioniert, dass alles in Ordnung ist, benötigen Sie 5 Nachrichten hintereinander über die Arbeit der Site. Die Nachrichtenzähler setzen sich gegenseitig zurück, wenn eine Nachricht auftritt. Dies ergibt eine Anzahl von 3-5 Nachrichten hintereinander.
Der Auslöser wird ausgelöst, wenn der andere zum Empfangen geöffnet wird.