HowTo: Node Red - Send Email on Events

1. Hello 🙂

   How is that, if I want to get for example a mail when a switch is active? With me then come infinitely many mails, I think that comes from the timestamp or so.

   Am absolute novice

   Greetings fabian

   Reply

   1. Hey Fabian,
      let me guess, you used an inject node which checks every second if the switch is activated and if yes a mail is sent? 🙂
      Why don't you post the code from the post in question here, so I can better understand it 🙂 .
      But if you already want to experiment a bit: You can build a "state lock" using two "trigger" blocks.
      An example where I have used this can be found in the code for presence detection using the FritzBox: https://nerdiy.de/nodered-fritzbox-anwesenheitserkennung-mit-der-fritzbox/
      This locking has the consequence that the incoming message is only forwarded if the status changes. After all, you only want to send an email when you switch the switch from "Off" to "On". 🙂
      I hope that helps you. If not, feel free to post your code here and I'll "craft" such a solution in there 🙂 .

      Best regards
      Fabian

      Reply

2. Hello Fabian
   Thanks for your feedback.

   Enclosed the code 😀

   LG Fabian

   [
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   }, "type": "ds18b20",
   }, "z": "57ba4cc7.5cb3f4",
   }, "name": "",
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   "x": 170,
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   "54a48697.1af1a8"
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   {
   }, "id": "54a48697.1af1a8",
   }, "type": "calculator",
   }, "z": "57ba4cc7.5cb3f4",
   }, "name": "",
   "inputMsgField": "payload",
   "outputMsgField": "payload",
   }, "operation": "sum",
   }, "constant": "2.4",
   "round": false,
   "decimals": 0,
   "x": 370,
   "y": 760,
   "wires": [
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   "b8f5c9e0.476758",
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   }, "format": "handlebars",
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   }, "name": "",
   "func": "if(msg.payload> 26.2) {msg.payload = false;}\nelse if (msg.payload< 24) {msg.payload = true;}\nreturn msg;",
   "outputs": 1,
   "noerr": 0,
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   "y": 460,
   "wires": [
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   "order": 6,
   "width: 0,
   "height: 0,
   "}, "gtype",
   }, "title": "water temp",
   "label: "",
   "format": "{{value| number:1}}°C",
   "min": 0,
   "max": "50",
   "colors": [
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   "#00ffe1",
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   "label: "",
   "format": "{{value| number:1}}°C",
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   "order": 2,
   "width": "7.8",
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   { "legend": "false",
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   "dot": true,
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   "useOneColor": false,
   "useUTC": false,
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   }, "field": "payload",
   }, "fieldType": "msg",
   }, "format": "handlebars",
   { "syntax": "mustache",
   "template": "{\"CurrentTemperature\":\"{{payload}}\"}",
   }, "output": "str",
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   }, "label": "temperature history",
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   "useOneColor": true,
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   "useOldStyle": false,
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   "wires": [
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   "wires": [
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   {
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   }, "label": "ventilation",
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   "width: 0,
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   "}, "topic",
   "}, "style",
   }, "onvalue": "false",
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   "}, "onicon",
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   "offvalueType": "bool",
   "}, "officon",
   "offcolor": "",
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   "timeoutUnits": "seconds",
   { "rate": "1",
   "nbRateUnits": "1",
   "rateUnits": "second",
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   }, "property": "payload",
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   "x": 750,
   "y": 760,
   "wires": [
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   },
   {
   }, "id": "97a8ff1f.f0019",
   }, "type": "rpi-gpio out",
   }, "z": "57ba4cc7.5cb3f4",
   }, "name": "ventilation",
   }, "pin": "37",
   "set": "",
   }, "level": "0",
   "}, "freq",
   "{ "out",
   "x": 1180,
   "y": 320,
   "wires": []
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   }, "field": "payload",
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   }, "format": "handlebars",
   { "syntax": "mustache",
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   }, "output": "str",
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   "wires": [
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   }, "z": "57ba4cc7.5cb3f4",
   }, "name": "",
   "}, "op1",
   "}, "op2",
   }, "op1type": "pay",
   }, "op2type": "payl",
   }, "duration": "24",
   "extend": false,
   "overrideDelay": false,
   }, "units": "hr",
   "}, "reset",
   }, "bytopic": "all",
   "{ "topic",
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   [
   "e08c20eb.589ed"
   ]
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   },
   {
   }, "id": "e08c20eb.589ed",
   }, "type": "template",
   }, "z": "57ba4cc7.5cb3f4",
   }, "name": "mail",
   }, "field": "payload",
   }, "fieldType": "msg",
   }, "format": "handlebars",
   { "syntax": "mustache",
   "template": "Warning message\n\nAquarium is too warm.\n\nVentilation has been activated!\n\nBest regards\nYour server",
   }, "output": "str",
   "x": 1310,
   "y": 460,
   "wires": [
   []
   ]
   },
   {
   }, "id": "d80536f4.eb90a8",
   { "type": "comment",
   }, "z": "57ba4cc7.5cb3f4",
   }, "name": "homekit",
   }, "info": "homekit",
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   "y": 400,
   "wires": []
   },
   {
   }, "id": "68db86f2.b08c58",
   { "type": "comment",
   }, "z": "57ba4cc7.5cb3f4",
   }, "name": "mailserver",
   { "info": "",
   "x": 1420,
   "y": 460,
   "wires": []
   },
   {
   }, "id": "a22f56en.8c6458",
   }, "type": "ui_group",
   }, "name": "aquarium",
   }, "tab": "2495f749.c25f58",
   "order": 4,
   "disp": true,
   "width": "4",
   "collapse": false
   },
   {
   }, "id": "8bdfeaf5.0afa18",
   }, "type": "ui_group",
   }, "name": "temperature",
   }, "tab": "99bb712a.2b3ca",
   "order": 3,
   "disp": true,
   "width": "12",
   "collapse": false
   },
   {
   }, "id": "be6d8af4.0031d8",
   }, "type": "ui_group",
   }, "name": "water values",
   }, "tab": "99bb712a.2b3ca",
   "order": 4,
   "disp": true,
   }, "width": "20",
   "collapse": false
   },
   {
   }, "id": "84c4d91b.9ddaa8",
   }, "type": "ui_group",
   }, "name": "circuit",
   }, "tab": "99bb712a.2b3ca",
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   "disp": true,
   "width": "4",
   "collapse": false
   },
   {
   }, "id": "2495f749.c25f58",
   }, "type": "ui_tab",
   }, "name": "control panel",
   }, "icon": "dashboard",
   "order": 1,
   "disabled: false,
   "hidden": false
   },
   {
   }, "id": "99bb712a.2b3ca",
   }, "type": "ui_tab",
   }, "name": "aquarium",
   }, "icon": "dashboard",
   "order": 4,
   "disabled: false,
   "hidden": false
   }
   ]

   Reply

   1. Hey Fabian,
      have been able to import your code. I didn't delete anything and only added the part that should bring the function 🙂 .
      Let me know if it worked 🙂 .
      [{„id“:“ab28b311.e87e5″,“type“:“ds18b20″,“z“:“ba705cfb.7ee0a“,“name“:““,“sensorid“:“28-03139779ce96″,“timer“:“0.1″,“x“:130,“y“:2520,“wires“:[[„b044b02a.74e65“]]},{„id“:“b044b02a.74e65″,“type“:“calculator“,“z“:“ba705cfb.7ee0a", "name":"", "inputMsgField": "payload", "outputMsgField": "payload", "operation": "sum", "constant": "2.4″,“round“:false,“decimals“:0,“x“:330,“y“:2520,“wires“:[[„7f3d76c9.23b358″,“c6a9f213.d9fcb“,“dd6c569.7663ca8″,“c3eb58f.778fda8″,“770f98ee.58c258″,“9cdd55d0.3bacf8″,“a40e44a0.15ea98″]]},{„id“:“7f3d76c9.23b358″,“type“:“template“,“z“:“ba705cfb.7ee0a", "name": "options", "field": "payload", "fieldType": "msg", "format": "handlebars", "syntax": "mustache", "template":"{\"foo\":\"bar\"}", "output": "str", "x":560, "y":2460, "wires":[["48dab8e0.ca9128"]]},{"id": "c6a9f213.d9fcb", "type": "function", "z": "ba705cfb.7ee0a", "name":"", "func": "if(msg.payload> 26.2) \n{\n msg.payload = false;\n}\nelse if (msg.payload< 24) \n{\n msg.payload = true;\n}\nreturn msg;", 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"interpolate":"linear","nodata":"","dot":true,"ymin":"23","ymax":"25","removeOlder":"1","removeOlderPoints":"","removeOlderUnit":"60","cutout":0,"useOneColor":false,"useUTC":false,"colors":["#00d9ff","#aec7e8","#ff7f0e","#00ff00","#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"],"useOldStyle":false,"outputs":1,"x":590,"y":2360,"wires":[[]]},{"id":"9cdd55d0.3bacf8","type":"template","z":"ba705cfb.7ee0a","name":"","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"{\"CurrentTemperature\":\"{{payload}}\"}","output":"str","x":560,"y":2520,"wires":[["15301b09.d03e65"]]},{"id":"a40e44a0.15ea98","type":"ui_chart","z":"ba705cfb.7ee0a", "name":"", "group": "bf0e6207.0ed3", "order":2, "width": "4", "height": "4", "label": "temperature history", "chartType": "line", "legend": "false", "xformat": "dd HH:mm", "interpolate": "linear", "nodata":"", "dot":false, "ymin": "23.", "ymax": "25", "removeOlder": "1", "removeOlderPoints":"", "removeOlderUnit": "604800", "cutout":0, "useOneColor":true, "useUTC":false, "colors":["#f702e3","#aec7e8","#ff7f0e","#00ff00","#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"],"useOldStyle":false,"outputs":1,"x":590,"y":2400,"wires":[[]]},{"id":"48dab8e0.ca9128","type":"json","z":"ba705cfb.7ee0a","name":"","property":"payload","action":"","pretty":false,"x":710,"y":2460,"wires":[[]]},{"id":"5b87956f.4ab73c","type":"ui_switch","z":"ba705cfb.7ee0a","name":"","label":"Lüftung","tooltip":"","group":"3cc5c223.3f1a2e", "order":4, "width":0, "height":0, "passthru":true, "decouple": "false", "topic":"", "style":"", "onvalue": "false", "onvalueType":"bool","onicon":"","oncolor":"","offvalue":"true","offvalueType":"bool","officon":"","offcolor":"","x":700,"y":2080,"wires":[["2fabb5e1.8db58a","8fda296a.f35b58","6bbb4798.295ab8"]]},{"id":"cac571b3.65e59","type":"delay","z":"ba705cfb.7ee0a", "name":"", "pauseType": "delay", "timeout": "10", "timeoutUnits": "seconds", "rate": "1", "nbRateUnits": "1", 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out","z":"ba705cfb.7ee0a","name":"Lüftung","pin":"37","set":"","level":"0","freq":"","out":"out","x":1140,"y":2080,"wires":[]},{"id":"8fda296a.f35b58","type":"template","z":"ba705cfb.7ee0a","name":"options","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"{\"foo\":\"bar\"}","output":"str","x":1000,"y":2160,"wires":[["f959d03a.784"]]},{"id":"6bbb4798.295ab8","type":"change","z":"ba705cfb.7ee0a","name":"","rules":[{"t":"change","p":"payload","pt":"msg","from":"false","fromt":"bool","to":"true","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":880,"y":2220,"wires":[["4e441bb9.ff4694"]]},{"id":"f959d03a.784","type":"json","z":"ba705cfb.7ee0a","name":"","property":"payload","action":"","pretty":false,"x":1150,"y":2160,"wires":[[]]},{"id":"4e441bb9.ff4694","type":"trigger","z":"ba705cfb.7ee0a","op1":"","op2":"","op1type":"pay","op2type":"payl","duration":"24","extend":false,"units":"hr","reset":"","bytopic":"all","name":"","x":1100,"y":2220,"wires":[["14531d47.88c793"]]},{"id":"14531d47.88c793","type":"template","z":"ba705cfb.7ee0a", "name": "mail", "field": "payload", "fieldType": "msg", "format": "handlebars", "syntax": "mustache", "template": "Warning message\n\nAquarium is too warm.\n\nVentilation has been activated!\n\nBest regards\nYour server", "output": "str", "x":1270, "y":2220, "wires":[[]]},{"id": "5d57fc0f.2457f4","type":"comment","z":"ba705cfb.7ee0a","name":"Homekit","info":"Homekit","x":1300,"y":2160,"wires":[]},{"id":"9db436ad.9af6b8","type":"comment","z":"ba705cfb.7ee0a","name":"Mailserver","info":"","x":1420,"y":2220,"wires":[]},{"id":"165cfc4f.46f004","type":"trigger","z":"ba705cfb.7ee0a","op1":"false","op2":"0","op1type":"str","op2type":"str","duration":"0","extend":false,"units":"ms","reset":"true","bytopic":"all","name":"false","x":1070,"y":2280,"wires":[["14531d47.88c793"]]},{"id":"2e9e95aa.f1c83a","type":"ui_group","name":"Aquarium","tab":"2d9fb55d.7b096a","order":4,"disp":true,"width":"4","collapse":false},{"id":"92f6590a.a3d328","type":"ui_group","name":"Temperatur","tab":"e7ec43f.3af8fc","order":3,"disp":true,"width":"12","collapse":false},{"id":"bf0e6207.0ed3","type":"ui_group","name":"Wasserwerte","tab":"e7ec43f.3af8fc","order":4,"disp":true,"width":"20","collapse":false},{"id":"3cc5c223.3f1a2e","type":"ui_group","name":"Schaltung","tab":"e7ec43f.3af8fc","order":2,"disp":true,"width":"4","collapse":false},{"id":"2d9fb55d.7b096a","type":"ui_tab","name":"Bedienfeld","icon":"dashboard","order":1,"disabled":false,"hidden":false},{"id":"e7ec43f.3af8fc", "type": "ui_tab", "name": "Aquarium", "icon": "dashboard", "order":4, "disabled":false, "hidden":false}] Best regards Fabian

      Reply

      1. Thank you 😀

         I will try right away;)

         Reply

3. Hello Fabian

   Unfortunately, I cannot paste the code.
   I have made you an email

   greetings
   fabian

   Reply

4. Hello! Maybe the MJML node is also something for you.
   https://flows.nodered.org/node/@vergissberlin/node-red-contrib-mjml
   With MJM L you can design e-mails in an attractive way. The MJM syntax simplifies the design process. By the need, is specially provided for e-mails is always generated.

   Reply

   1. Hey Andre,
      thanks for the hint. I didn't know that at all 🙂
      I'll have a look at it and maybe make a HowTo for it.
      Thank you and best regards
      Fabian

      Reply

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