Hi!
At the picture here, i get a date and time in a payload.
Is there a way to just extract the time and make an output to activate at this specific time?
my approach would be to use a node called Cron Plus that allows you to create dynamic schedules
with a little bit of javascript you can modify the datetime to Cron format and construct a msg to create that dynamic schedule
Test flow : (based on your previous thread)
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:\"2021-09-07T22:00:00.000+02:00\"},{\"total\":0.4366,\"energy\":0.3296,\"tax\":0.107,\"startsAt\":\"2021-09-07T23:00:00.000+02:00\"}]}}}]}}","payloadType":"json","x":130,"y":620,"wires":[["6068ec2576871871","6f82207b692dd1cf"]]},{"id":"6068ec2576871871","type":"debug","z":"4895ea10b4ee9ead","name":"1","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":230,"y":560,"wires":[]},{"id":"6f82207b692dd1cf","type":"function","z":"4895ea10b4ee9ead","name":"","func":"let today = msg.payload.viewer.homes[0].currentSubscription.priceInfo.today.slice(-5)\nlet tomorrow = msg.payload.viewer.homes[0].currentSubscription.priceInfo.tomorrow.slice(0, 5)\nlet total = today.concat(tomorrow)\nnode.warn(total);\n\nlet totalMinimum = today[0].total\nlet totalMinimumStartsAt;\n\ntotal.forEach(el => {\n if (el.total < totalMinimum) {\n totalMinimum = el.total;\n totalMinimumStartsAt = el.startsAt;\n }\n})\n\n\nmsg.payload = {\n totalMinimum,\n totalMinimumStartsAt\n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":330,"y":620,"wires":[["b1f094c1b38cb61b","12791505802fe0d3"]]},{"id":"b1f094c1b38cb61b","type":"debug","z":"4895ea10b4ee9ead","name":"2","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":430,"y":560,"wires":[]},{"id":"08fd97ed5d4aee8a","type":"cronplus","z":"4895ea10b4ee9ead","name":"","outputField":"payload","timeZone":"","persistDynamic":false,"commandResponseMsgOutput":"output1","outputs":1,"options":[],"x":720,"y":620,"wires":[[]]},{"id":"12791505802fe0d3","type":"function","z":"4895ea10b4ee9ead","name":"Date to Cron","func":"const dateToCron = (date) => {\n const seconds = date.getSeconds();\n const minutes = date.getMinutes();\n const hours = date.getHours();\n const day = date.getDate();\n const month = date.getMonth() + 1;\n const year = date.getFullYear();\n\n return `${seconds} ${minutes} ${hours} ${day} ${month} * ${year}`;\n};\n\nconst dateText = msg.payload.totalMinimumStartsAt;\nconst date = new Date(dateText);\n\nconst cron = dateToCron(date);\n\n// create Dynamic Cron Schedule\nmsg.payload = {\n \"command\": \"add\",\n \"name\": \"Dynamic Cron Schedule\",\n \"expression\": cron,\n \"expressionType\": \"cron\",\n \"payloadType\": \"default\",\n \"limit\": 1 \n}\n\n\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":530,"y":620,"wires":[["704890d26877d232","08fd97ed5d4aee8a"]]},{"id":"704890d26877d232","type":"debug","z":"4895ea10b4ee9ead","name":"3","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":650,"y":560,"wires":[]}]
ps. Im not sure about the timezone time conversion
Andy, clever demo 
However, since the OP's date time is already correct format, we can simply add a date schedule (instead of parsing the date into a cron schedule)
The benefit of this is the +02:00 timezone offset is taken into account.
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\"2021-09-07T22:00:00.000+02:00\"},{\"total\":0.4366,\"energy\":0.3296,\"tax\":0.107,\"startsAt\":\"2021-09-07T23:00:00.000+02:00\"}]}}}]}}","payloadType":"json","x":970,"y":1900,"wires":[["6068ec2576871871","12791505802fe0d3"]]},{"id":"6068ec2576871871","type":"debug","z":"5d3f964c.fef898","name":"1","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":1010,"y":1960,"wires":[]},{"id":"08fd97ed5d4aee8a","type":"cronplus","z":"5d3f964c.fef898","name":"","outputField":"payload","timeZone":"","persistDynamic":false,"commandResponseMsgOutput":"output1","outputs":1,"options":[],"x":1400,"y":1900,"wires":[["90682615323afee9"]]},{"id":"12791505802fe0d3","type":"function","z":"5d3f964c.fef898","name":"Generate date event","func":"\n\n// create Dynamic Cron Schedule\nmsg.payload = {\n \"command\": \"add\",\n \"name\": \"Dynamic Cron Schedule\",\n \"expression\": new Date(msg.payload.viewer.homes[0].currentSubscription.priceInfo.tomorrow[0].startsAt),\n \"expressionType\": \"dates\",\n \"payloadType\": \"default\",\n \"limit\": 1 \n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1180,"y":1900,"wires":[["08fd97ed5d4aee8a","598fe8c6d01b9460"]]},{"id":"90682615323afee9","type":"debug","z":"5d3f964c.fef898","name":"3","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":1470,"y":1960,"wires":[]},{"id":"598fe8c6d01b9460","type":"debug","z":"5d3f964c.fef898","name":"2","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":1250,"y":1960,"wires":[]}]
2 Likes
oppps .. ofcourse .. thats much cleaner ..
if only i spent a couple of minutes more reading the Cron plus Help window pass the code example 
1 Like
I get this error when using the function "Generate date event"
TypeError: Cannot read property 'homes' of undefined
I think that maybe it's because the tomorrow doesn't contain any information until after 14.00 PM.
Is the a way to discard that payload if there isn't containing anything?
Hello ..
What do you want your application to do in this case ?
Get the min. value from today only ? or not produce any result ?
In either case, some more checks need to be done in code to avoid any errors.
Put some debug nodes after each step to make sure what step is failing and producing that undefined.
By the way, Steve in his example to demostrate the correct use of Cron plus used this line
"expression": new Date(msg.payload.viewer.homes[0].currentSubscription.priceInfo.tomorrow[0].startsAt),
.. because i worked on your previous question (regarding finding the minimum value from the arrrays)
that process has the date in msg.payload.totalMinimumStartsAt
If tomorrow is null, I want only the value from today
But I think that it works anyway. I get a warning from function node, but it still sends the message
Try this
[{"id":"212466ae0870af64","type":"cronplus","z":"4895ea10b4ee9ead","name":"","outputField":"payload","timeZone":"","persistDynamic":false,"commandResponseMsgOutput":"output1","outputs":1,"options":[],"x":880,"y":1080,"wires":[["892b52223e704e42"]]},{"id":"3ad3b23fec44a0df","type":"function","z":"4895ea10b4ee9ead","name":"Generate date event","func":"\n// create Dynamic Cron Schedule\nmsg.payload = {\n \"command\": \"add\",\n \"name\": \"Dynamic Cron Schedule\",\n \"expression\": new Date(msg.payload.totalMinimumStartsAt),\n \"expressionType\": \"dates\",\n \"payload\": \"your msg when the schedule is triggered\",\n \"payloadType\": \"str\",\n \"limit\": 1 \n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":660,"y":1080,"wires":[["212466ae0870af64","7a39f750528ad605"]]},{"id":"892b52223e704e42","type":"debug","z":"4895ea10b4ee9ead","name":"3","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":950,"y":1140,"wires":[]},{"id":"7a39f750528ad605","type":"debug","z":"4895ea10b4ee9ead","name":"2","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":730,"y":1140,"wires":[]},{"id":"4723ba4c47d907fe","type":"inject","z":"4895ea10b4ee9ead","name":"check status","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"{\"command\":\"status-all\"}","payloadType":"json","x":750,"y":1000,"wires":[["212466ae0870af64"]]},{"id":"ab7e3bcb993b03b8","type":"inject","z":"4895ea10b4ee9ead","name":"with tomorrow","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"{\"viewer\":{\"homes\":[{\"currentSubscription\":{\"priceInfo\":{\"current\":{\"total\":1.422,\"energy\":1.118,\"tax\":0.304,\"startsAt\":\"2021-09-06T15:00:00.000+02:00\"},\"today\":[{\"total\":0.6721,\"energy\":0.5181,\"tax\":0.154,\"startsAt\":\"2021-09-06T00:00:00.000+02:00\"},{\"total\":0.6608,\"energy\":0.509,\"tax\":0.1518,\"startsAt\":\"2021-09-06T01:00:00.000+02:00\"},{\"total\":0.6603,\"energy\":0.5086,\"tax\":0.1517,\"startsAt\":\"2021-09-06T02:00:00.000+02:00\"},{\"total\":0.6641,\"energy\":0.5117,\"tax\":0.1524,\"startsAt\":\"2021-09-06T03:00:00.000+02:00\"},{\"total\":0.6731,\"energy\":0.5189,\"tax\":0.1542,\"startsAt\":\"2021-09-06T04:00:00.000+02:00\"},{\"total\":0.9165,\"energy\":0.7136,\"tax\":0.2029,\"startsAt\":\"2021-09-06T05:00:00.000+02:00\"},{\"total\":1.5177,\"energy\":1.1946,\"tax\":0.3231,\"startsAt\":\"2021-09-06T06:00:00.000+02:00\"},{\"total\":1.899,\"energy\":1.4996,\"tax\":0.3994,\"startsAt\":\"2021-09-06T07:00:00.000+02:00\"},{\"total\":2.0578,\"energy\":1.6266,\"tax\":0.4312,\"startsAt\":\"2021-09-06T08:00:00.000+02:00\"},{\"total\":1.7942,\"energy\":1.4158,\"tax\":0.3784,\"startsAt\":\"2021-09-06T09:00:00.000+02:00\"},{\"total\":1.6516,\"energy\":1.3017,\"tax\":0.3499,\"startsAt\":\"2021-09-06T10:00:00.000+02:00\"},{\"total\":1.4313,\"energy\":1.1254,\"tax\":0.3059,\"startsAt\":\"2021-09-06T11:00:00.000+02:00\"},{\"total\":1.3661,\"energy\":1.0733,\"tax\":0.2928,\"startsAt\":\"2021-09-06T12:00:00.000+02:00\"},{\"total\":1.2986,\"energy\":1.0193,\"tax\":0.2793,\"startsAt\":\"2021-09-06T13:00:00.000+02:00\"},{\"total\":1.3323,\"energy\":1.0462,\"tax\":0.2861,\"startsAt\":\"2021-09-06T14:00:00.000+02:00\"},{\"total\":1.422,\"energy\":1.118,\"tax\":0.304,\"startsAt\":\"2021-09-06T15:00:00.000+02:00\"},{\"total\":1.5488,\"energy\":1.2195,\"tax\":0.3293,\"startsAt\":\"2021-09-06T16:00:00.000+02:00\"},{\"total\":1.6755,\"energy\":1.3208,\"tax\":0.3547,\"startsAt\":\"2021-09-06T17:00:00.000+02:00\"},{\"total\":1.6755,\"energy\":1.3208,\"tax\":0.3547,\"startsAt\":\"2021-09-06T18:00:00.000+02:00\"},{\"total\":1.6558,\"energy\":1.3051,\"tax\":0.3507,\"startsAt\":\"2021-09-06T19:00:00.000+02:00\"},{\"total\":1.2656,\"energy\":0.9929,\"tax\":0.2727,\"startsAt\":\"2021-09-06T20:00:00.000+02:00\"},{\"total\":1.1671,\"energy\":0.9141,\"tax\":0.253,\"startsAt\":\"2021-09-06T21:00:00.000+02:00\"},{\"total\":0.9563,\"energy\":0.7454,\"tax\":0.2109,\"startsAt\":\"2021-09-06T22:00:00.000+02:00\"},{\"total\":0.6288,\"energy\":0.4834,\"tax\":0.1454,\"startsAt\":\"2021-09-06T23:00:00.000+02:00\"}],\"tomorrow\":[{\"total\":0.6308,\"energy\":0.4851,\"tax\":0.1457,\"startsAt\":\"2021-09-07T00:00:00.000+02:00\"},{\"total\":0.6263,\"energy\":0.4814,\"tax\":0.1449,\"startsAt\":\"2021-09-07T01:00:00.000+02:00\"},{\"total\":0.6249,\"energy\":0.4803,\"tax\":0.1446,\"startsAt\":\"2021-09-07T02:00:00.000+02:00\"},{\"total\":0.6241,\"energy\":0.4797,\"tax\":0.1444,\"startsAt\":\"2021-09-08T03:00:00.000+02:00\"},{\"total\":0.6293,\"energy\":0.4838,\"tax\":0.1455,\"startsAt\":\"2021-09-07T04:00:00.000+02:00\"},{\"total\":0.7142,\"energy\":0.5518,\"tax\":0.1624,\"startsAt\":\"2021-09-07T05:00:00.000+02:00\"},{\"total\":1.1434,\"energy\":0.8951,\"tax\":0.2483,\"startsAt\":\"2021-09-07T06:00:00.000+02:00\"},{\"total\":1.4823,\"energy\":1.1662,\"tax\":0.3161,\"startsAt\":\"2021-09-07T07:00:00.000+02:00\"},{\"total\":1.7308,\"energy\":1.3651,\"tax\":0.3657,\"startsAt\":\"2021-09-07T08:00:00.000+02:00\"},{\"total\":1.5923,\"energy\":1.2543,\"tax\":0.338,\"startsAt\":\"2021-09-07T09:00:00.000+02:00\"},{\"total\":1.4388,\"energy\":1.1315,\"tax\":0.3073,\"startsAt\":\"2021-09-07T10:00:00.000+02:00\"},{\"total\":1.4383,\"energy\":1.1311,\"tax\":0.3072,\"startsAt\":\"2021-09-07T11:00:00.000+02:00\"},{\"total\":1.362,\"energy\":1.07,\"tax\":0.292,\"startsAt\":\"2021-09-07T12:00:00.000+02:00\"},{\"total\":1.1805,\"energy\":0.9248,\"tax\":0.2557,\"startsAt\":\"2021-09-07T13:00:00.000+02:00\"},{\"total\":1.1298,\"energy\":0.8842,\"tax\":0.2456,\"startsAt\":\"2021-09-07T14:00:00.000+02:00\"},{\"total\":0.9907,\"energy\":0.773,\"tax\":0.2177,\"startsAt\":\"2021-09-07T15:00:00.000+02:00\"},{\"total\":0.9702,\"energy\":0.7566,\"tax\":0.2136,\"startsAt\":\"2021-09-07T16:00:00.000+02:00\"},{\"total\":1.0907,\"energy\":0.853,\"tax\":0.2377,\"startsAt\":\"2021-09-07T17:00:00.000+02:00\"},{\"total\":1.0866,\"energy\":0.8497,\"tax\":0.2369,\"startsAt\":\"2021-09-07T18:00:00.000+02:00\"},{\"total\":1.0081,\"energy\":0.7869,\"tax\":0.2212,\"startsAt\":\"2021-09-07T19:00:00.000+02:00\"},{\"total\":0.9414,\"energy\":0.7335,\"tax\":0.2079,\"startsAt\":\"2021-09-07T20:00:00.000+02:00\"},{\"total\":0.872,\"energy\":0.678,\"tax\":0.194,\"startsAt\":\"2021-09-07T21:00:00.000+02:00\"},{\"total\":0.5883,\"energy\":0.451,\"tax\":0.1373,\"startsAt\":\"2021-09-07T22:00:00.000+02:00\"},{\"total\":0.4366,\"energy\":0.3296,\"tax\":0.107,\"startsAt\":\"2021-09-07T23:00:00.000+02:00\"}]}}}]}}","payloadType":"json","x":210,"y":1040,"wires":[["6f82207b692dd1cf"]]},{"id":"6f82207b692dd1cf","type":"function","z":"4895ea10b4ee9ead","name":"totalMinimum","func":"let today = msg.payload.viewer.homes[0].currentSubscription.priceInfo.today.slice(-5)\nlet tomorrow = msg.payload.viewer.homes[0].currentSubscription.priceInfo.tomorrow || []\ntomorrow = tomorrow.slice(0, 5)\nlet total = today.concat(tomorrow)\nnode.warn(total);\n\nlet totalMinimum = today[0].total\nlet totalMinimumStartsAt;\n\ntotal.forEach(el => {\n if (el.total < totalMinimum) {\n totalMinimum = el.total;\n totalMinimumStartsAt = el.startsAt;\n }\n})\n\nmsg.payload = {\n totalMinimum,\n totalMinimumStartsAt\n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":400,"y":1080,"wires":[["b1f094c1b38cb61b","3ad3b23fec44a0df"]]},{"id":"b1f094c1b38cb61b","type":"debug","z":"4895ea10b4ee9ead","name":"2","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":490,"y":1020,"wires":[]},{"id":"02faf65844a13615","type":"inject","z":"4895ea10b4ee9ead","name":"with no tomorrow","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"{\"viewer\":{\"homes\":[{\"currentSubscription\":{\"priceInfo\":{\"current\":{\"total\":1.422,\"energy\":1.118,\"tax\":0.304,\"startsAt\":\"2021-09-06T15:00:00.000+02:00\"},\"today\":[{\"total\":0.6721,\"energy\":0.5181,\"tax\":0.154,\"startsAt\":\"2021-09-06T00:00:00.000+02:00\"},{\"total\":0.6608,\"energy\":0.509,\"tax\":0.1518,\"startsAt\":\"2021-09-06T01:00:00.000+02:00\"},{\"total\":0.6603,\"energy\":0.5086,\"tax\":0.1517,\"startsAt\":\"2021-09-06T02:00:00.000+02:00\"},{\"total\":0.6641,\"energy\":0.5117,\"tax\":0.1524,\"startsAt\":\"2021-09-06T03:00:00.000+02:00\"},{\"total\":0.6731,\"energy\":0.5189,\"tax\":0.1542,\"startsAt\":\"2021-09-06T04:00:00.000+02:00\"},{\"total\":0.9165,\"energy\":0.7136,\"tax\":0.2029,\"startsAt\":\"2021-09-06T05:00:00.000+02:00\"},{\"total\":1.5177,\"energy\":1.1946,\"tax\":0.3231,\"startsAt\":\"2021-09-06T06:00:00.000+02:00\"},{\"total\":1.899,\"energy\":1.4996,\"tax\":0.3994,\"startsAt\":\"2021-09-06T07:00:00.000+02:00\"},{\"total\":2.0578,\"energy\":1.6266,\"tax\":0.4312,\"startsAt\":\"2021-09-06T08:00:00.000+02:00\"},{\"total\":1.7942,\"energy\":1.4158,\"tax\":0.3784,\"startsAt\":\"2021-09-06T09:00:00.000+02:00\"},{\"total\":1.6516,\"energy\":1.3017,\"tax\":0.3499,\"startsAt\":\"2021-09-06T10:00:00.000+02:00\"},{\"total\":1.4313,\"energy\":1.1254,\"tax\":0.3059,\"startsAt\":\"2021-09-06T11:00:00.000+02:00\"},{\"total\":1.3661,\"energy\":1.0733,\"tax\":0.2928,\"startsAt\":\"2021-09-06T12:00:00.000+02:00\"},{\"total\":1.2986,\"energy\":1.0193,\"tax\":0.2793,\"startsAt\":\"2021-09-06T13:00:00.000+02:00\"},{\"total\":1.3323,\"energy\":1.0462,\"tax\":0.2861,\"startsAt\":\"2021-09-06T14:00:00.000+02:00\"},{\"total\":1.422,\"energy\":1.118,\"tax\":0.304,\"startsAt\":\"2021-09-06T15:00:00.000+02:00\"},{\"total\":1.5488,\"energy\":1.2195,\"tax\":0.3293,\"startsAt\":\"2021-09-06T16:00:00.000+02:00\"},{\"total\":1.6755,\"energy\":1.3208,\"tax\":0.3547,\"startsAt\":\"2021-09-06T17:00:00.000+02:00\"},{\"total\":1.6755,\"energy\":1.3208,\"tax\":0.3547,\"startsAt\":\"2021-09-06T18:00:00.000+02:00\"},{\"total\":1.6558,\"energy\":1.3051,\"tax\":0.3507,\"startsAt\":\"2021-09-06T19:00:00.000+02:00\"},{\"total\":1.2656,\"energy\":0.9929,\"tax\":0.2727,\"startsAt\":\"2021-09-06T20:00:00.000+02:00\"},{\"total\":1.1671,\"energy\":0.9141,\"tax\":0.253,\"startsAt\":\"2021-09-06T21:00:00.000+02:00\"},{\"total\":0.9563,\"energy\":0.7454,\"tax\":0.2109,\"startsAt\":\"2021-09-06T22:00:00.000+02:00\"},{\"total\":0.6288,\"energy\":0.4834,\"tax\":0.1454,\"startsAt\":\"2021-09-06T23:00:00.000+02:00\"}]}}}]}}","payloadType":"json","x":200,"y":1120,"wires":[["6f82207b692dd1cf"]]}]
let tomorrow = msg.payload.viewer.homes[0].currentSubscription.priceInfo.tomorrow || []
tomorrow = tomorrow.slice(0, 5)
|| [] assigns an empty array to tomorrow variable if the left hand side is undefined
Great ,that should do the trick!
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