قبل البداية
يجب أن يكون لديك بالفعل Node-Red مثبتًا مع عقدة اللحظة. تم وصف طرق التثبيت المختلفة على موقع المطور /nodered.org/docs/getting-started / قم
باستيراد كود التدفق إلى Node-RED وستحصل على جميع العقد كما في الصورة
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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":[]}]ماذا يفعل هذا التدفق
- يتحقق مما إذا كان هناك اتصال بالإنترنت
- يتحقق مما إذا كان هناك وصول إلى الموقع
- إذا لم يكن هناك وصول / استعاد تغريدة عن ذلك
- تحسب المدة التي ظل فيها الموقع خاملاً
- يكتب سجل إلى ملف
ما يجب تكوينه
- العقدة 1: تحتاج إلى كتابة عنوان الموقع للمراقبة
- العقد 2: تحتاج إلى تعيين الجزء الأول من نص التغريدة
- العقد 3: هنا يتم إضافة البيانات المؤقتة إلى التغريدة ، يمكنك أيضًا إضافة النص الخاص بك
- - العقد 4: هنا تحتاج إلى تعيين حساب Twitter الخاص بك والمجلد لملف السجل بعد التغييرات ، لا تنس النقر فوق نشر
كيف تعمل
نبدأ من أعلى اليسار
- عقدة [الطابع الزمني] - تكتب الوقت إلى متغير الوقت
- عقدة [Started!] - تعيد تعيين عدادات الأحداث في البداية وتعيين المشغلات
- العقدة [1 دقيقة] - تبدأ عملية المراقبة كل دقيقة.
بادئ ذي بدء ، سوف نتحقق مما إذا كانت عقد الإنترنت [google.com]> [تحقق مما إذا كان الإنترنت الخاص بي يعمل] إذا تلقينا استجابة قدرها 200 ، فإن الإنترنت يعمل لدينا ، إذا لم يكن الأمر كذلك ، فإما أن الإنترنت لا يعمل معنا أو أن موقع google.com مستلقي
. موقع [name.com]> ([تم العثور على كلمة على الويب] [ليست 200 استجابة]) هنا لا يمكننا انتظار رد 200 فحسب ، بل يمكن أيضًا إصداره من خلال صفحات كعب روتين (على سبيل المثال ، عدم الدفع مقابل الاستضافة) - لذلك ، يعتبر الموقع عاملاً إذا تم العثور على كلمة في محتواه - لدي معرف Google هذا. إذا لم يكن هناك إجابة 200 (الموقع لا يعمل على الإطلاق أو يعطي أخطاء 404 ، وما إلى ذلك) ، فإننا نعتبر أن الموقع لا يعمل.
بعد ذلك ، نبدأ في حساب هذه الأحداث ، إذا ظهرت 3 رسائل متتالية حول موقع معطل ، فسيتم تمريرها إلى مشغل - يتخطى رسالة واحدة ويتم حظره - بحيث لا يوجد العديد من التغريدات حول نفس الشيء. لكي يعمل المشغل على إرسال تغريدة تفيد بأن كل شيء على ما يرام ، تحتاج إلى 5 رسائل متتالية حول عمل الموقع. تعيد عدادات الرسائل إعادة تعيين بعضها البعض عند ظهور رسالة ، وهذا يوفر عددًا من 3-5 رسائل على التوالي.
يتم إطلاق الزناد عندما يفتح الآخر للاستقبال.