Efficient way to compare/check when an entity was last changed?

nappyjim · August 22, 2024, 1:54am

I have a button next to my furnace air filter. When I change the filter, I press the button which updates a input_datetime helper to the current date/time.

I would like an efficient way to check this date to current date/time and have an alert sent to me if the two are more than 45 days apart.

For other things, I’ve just used a trigger node and had it wait, but that was for hours, not days. I feel like its not good to have a trigger node counting for 45 days.

Is there some sort of compare I can do? And if it passes the compare, it would then send my phone an alert. I can handle the alert part, I just need help with the compare part.

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mwaterbu · August 22, 2024, 2:30am

I think this is what you are asking for:

trigger:
  - platform: template
    value_template: >-
      {{(as_timestamp(now()) - as_timestamp(states.sensor.button_hvac_filter.last_changed)) > 3888000 }}

However, I would be concerned that the last_changed of that button could get reset during a reboot or update, especially for such a long time period. Sometimes if entities go unavailable, it can mess with those attributes.

My thought for making this more robust would be to run a script when you press that button to save the current date into a helper.

sequence:
  - action: input_datetime.set_datetime
    data:
      datetime: "{{now()}}"
    target:
      entity_id: input_datetime.test

and then trigger based on that value

trigger:
  - platform: template
    value_template: >-
      {{(as_timestamp(now()) - as_timestamp(states.input_datetime.test.state)) > 3888000 }}

I am actually working on something similar to this using a to-do list. If I ever get back around to that, I will try to remember and share it here as well.

Edit: I just realized this is tagged Node-RED…I have not used that before. Hope this is still at least somewhat useful for you.

nappyjim · August 22, 2024, 3:34am

@mwaterbu Thank you for suggestion. I amended my original post. I like your idea of adding a input_datetime helper. So I did that, but i still need node red help in comparing the value in the helper to the current date.

Mikefila · August 22, 2024, 3:57am

When you press the button set the date time helper to 45 days later. Use the date time helper in a time node to trigger the notification. Use the time formatter node to add 45 days to the time stamp.

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edit: to set a specific time change HH:mm:ss to the time of day(24 hour clock) in the output section. If you wanted the notification 45 days later @ 1:00pm use

nappyjim · August 22, 2024, 4:08am

@Mikefila

I think that’ll work! Thanks!

nappyjim · September 14, 2024, 4:50am

@Mikefila

I am getting back around to truly implementing this and I am getting some odd results in testing. Half the time I try to add 1 day to the datetime, the state node errors out. And my node red debug is saying the date is in the past. But if you look at the date time helper, it is NOT in the past. It is one day in the future.

But then if I just change the state node to some other entity, then back to the right one, it will update and say the date that it just told me was in the past, is now actually, rightfully, in the future.

See video below. And here is the code. (the comment on the nodes say 30 days, but its currently set to 1 day just because i was testing)

[{"id":"941be3a5d2e1fdb5","type":"tab","label":"Flow 2","disabled":false,"info":"","env":[]},{"id":"57364d8579367e03","type":"inject","z":"941be3a5d2e1fdb5","name":"Simulate button press","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"iso","payloadType":"date","x":135,"y":270,"wires":[["101f9485bd171a33"]]},{"id":"101f9485bd171a33","type":"moment","z":"941be3a5d2e1fdb5","name":"add 30 days","topic":"","input":"payload","inputType":"msg","inTz":"ETC/UTC","adjAmount":"1","adjType":"days","adjDir":"add","format":"YYYY-MM-DD HH:mm:ss","locale":"En","output":"payload","outputType":"msg","outTz":"America/Chicago","x":350,"y":270,"wires":[["60c551cde377a1fc"]]},{"id":"60c551cde377a1fc","type":"api-call-service","z":"941be3a5d2e1fdb5","name":"Set filter due date time","server":"ab3e2c53.e3491","version":7,"debugenabled":false,"action":"input_datetime.set_datetime","floorId":[],"areaId":[],"deviceId":[],"entityId":["input_datetime.hvac_filter_change_due_date","input_datetime.hvac_filter_change_due_date_nag"],"labelId":[],"data":"{\"datetime\": payload }","dataType":"jsonata","mergeContext":"","mustacheAltTags":false,"outputProperties":[],"queue":"none","blockInputOverrides":false,"domain":"input_datetime","service":"set_datetime","x":560,"y":270,"wires":[[]]},{"id":"50e034759879a719","type":"ha-time","z":"941be3a5d2e1fdb5","name":"Trigger on HVAC filter change due date","server":"ab3e2c53.e3491","version":3,"exposeAsEntityConfig":"","entityId":"input_datetime.hvac_filter_change_due_date","property":"state","offset":"0","offsetType":"num","offsetUnits":"minutes","randomOffset":false,"repeatDaily":false,"outputProperties":[{"property":"payload","propertyType":"msg","value":"","valueType":"date"},{"property":"data","propertyType":"msg","value":"","valueType":"entity"},{"property":"topic","propertyType":"msg","value":"","valueType":"triggerId"}],"sunday":true,"monday":true,"tuesday":true,"wednesday":true,"thursday":true,"friday":true,"saturday":true,"x":165,"y":405,"wires":[["36274334734556bf"]]},{"id":"36274334734556bf","type":"api-call-service","z":"941be3a5d2e1fdb5","name":"Alert Jims phone","server":"ab3e2c53.e3491","version":7,"debugenabled":false,"action":"notify.notify_jim","floorId":[],"areaId":[],"deviceId":[],"entityId":[],"labelId":[],"data":"{\"title\":\"\",\"message\":\"Change HVAC filter\",\"data\":{\"sticky\":\"false\",\"priority\":\"Normal\",\"ttl\":0,\"tag\":\"HVAC filter\",\"color\":\"blue\",\"notification_icon\":\"mdi:air-filter\"}}","dataType":"json","mergeContext":"","mustacheAltTags":false,"outputProperties":[{"property":"payload","propertyType":"msg","value":"","valueType":"date"}],"queue":"none","blockInputOverrides":false,"domain":"notify","service":"notify_jim","x":450,"y":405,"wires":[["561048dd42d86ec0"]]},{"id":"561048dd42d86ec0","type":"moment","z":"941be3a5d2e1fdb5","name":"Add 12 hours","topic":"","input":"payload","inputType":"msg","inTz":"ETC/UTC","adjAmount":"1","adjType":"days","adjDir":"add","format":"YYYY-MM-DD HH:mm:ss","locale":"En","output":"payload","outputType":"msg","outTz":"America/Chicago","x":640,"y":405,"wires":[["43b54680bbabcd45"]]},{"id":"43b54680bbabcd45","type":"api-call-service","z":"941be3a5d2e1fdb5","name":"Set filter due date NAG time","server":"ab3e2c53.e3491","version":7,"debugenabled":false,"action":"input_datetime.set_datetime","floorId":[],"areaId":[],"deviceId":[],"entityId":["input_datetime.hvac_filter_change_due_date_nag"],"labelId":[],"data":"{\"datetime\": payload }","dataType":"jsonata","mergeContext":"","mustacheAltTags":false,"outputProperties":[],"queue":"none","blockInputOverrides":false,"domain":"input_datetime","service":"set_datetime","x":855,"y":405,"wires":[[]]},{"id":"ab3e2c53.e3491","type":"server","name":"AvilaSmartHome","version":5,"addon":true,"rejectUnauthorizedCerts":true,"ha_boolean":"y|yes|true|on|home|open","connectionDelay":true,"cacheJson":true,"heartbeat":false,"heartbeatInterval":30,"areaSelector":"friendlyName","deviceSelector":"friendlyName","entitySelector":"friendlyName","statusSeparator":"at: ","statusYear":"hidden","statusMonth":"short","statusDay":"numeric","statusHourCycle":"h23","statusTimeFormat":"h:m","enableGlobalContextStore":true}]

Mikefila · September 14, 2024, 5:45pm

I don’t experience that error. The only thing I can suggest is deleting that time node, deploy and drag out a new one.

nappyjim · September 14, 2024, 6:15pm

Hmmm, I created new flow, new datetime helpers and I see the same thing. It work the first time, then errors out after.

Domoticon · September 14, 2024, 6:17pm

Can’t you use Unix Epoch time for this?
Like storing (by a button) the Epoch value in a remanent variable/file, and substract the actual Epoch value with stored value.
You wil end with a value which represents the seconds between storage ↔ actual.

As far as I know the simpletime node can generate Epoch values (node-red-contrib-simpletime).
Also you can use A Date/Time Formatter - node for more time convertion possibilities (node-red-contrib-moment).

I hope this helps…

EDIT: FYI, I checked the inject-node which can inject milliseconds since epoch (timestamp). You can use it to inject it every second, minute etc…
EDIT2: FYI, the milliseconds since epoch is also available in the button nodes.
EDIT3: FYI, an Unix Epoch Clock.

mikep99 · September 14, 2024, 6:32pm

I’ve just had something similar after updating to the latest version of NR.
Make sure all your nodes are upto date in the palette and restart Node Red.
It seemed to work for me.
HTH

nappyjim · September 15, 2024, 1:43am

No go. Still errors.

@Domoticon
I understand where your going but I wont be able to implement it.

Mikefila · September 15, 2024, 1:55am

It doesn’t solve the error but you could, instead of saving it to a datetime helper, save it to a local calendar. Then use the calendar node for a trigger.

nappyjim · September 15, 2024, 2:17am

It just so weird because once it errors out, I can inject into it as much as I want and it’ll never work again until I change the enitity to something else, then back to the right one. Then I can inject every second and it works.

nappyjim · September 16, 2024, 2:13am

FYI I posted bug report for this as it has to be a bug.

github.com/zachowj/node-red-contrib-home-assistant-websocket

Time node errors out with incorrect claim.

opened 03:12AM - 15 Sep 24 UTC

nappyjim

### Describe the bug I will be attaching video to the bottom. Below is the s…teps that are occurring in the video: 1. On first line you will see me simulate a button press which adds 15 seconds to a HomeAssistant datetime helper called test1. 2. On second line, the time node tied to **input_datetime.test1** is waiting to expire. When it does, it adds 30 seconds to **input_datetime.test2** 3. On third line, the time node tide to input_datetime.test2 is waiting to expire, which will happen in 30 seconds. **So far so good. But then here is where things go bad.** 4. After test2 expires, it adds 30 seconds to the time and tries to set test2 again. That is when you see the error and in the debug log it says "Date in past. Will never be fired". But that is NOT true. You can see the node triggered at 19:26, but on the right side of the screen in the other browser you can see the test2 time node is set for 19:27. Last time I checked, 19:27 is in the future in reference to 19:26. Everything is updated. I have tried a restart. I have tried deleting everything and restarting from scratch, it doesnt matter. For purposes of taking video, I reduced the time to seconds, but even when I had it set to days, the issue occured. ### To Reproduce _No response_ ### Expected behavior In step 4 above, I should not have an error as the datetime helper is set to the future, not the past. ### Screenshots https://www.youtube.com/watch?v=iCnvJFhC1X0 ### Example Flow ```json [{"id":"62f33b91447bf1c4","type":"tab","label":"Flow 1","disabled":false,"info":"","env":[]},{"id":"c8a58b2f06ace016","type":"ha-time","z":"62f33b91447bf1c4","name":"input_datetime.test1","server":"ab3e2c53.e3491","version":3,"exposeAsEntityConfig":"","entityId":"input_datetime.test1","property":"state","offset":"0","offsetType":"num","offsetUnits":"minutes","randomOffset":false,"repeatDaily":false,"outputProperties":[{"property":"payload","propertyType":"msg","value":"","valueType":"date"}],"sunday":true,"monday":true,"tuesday":true,"wednesday":true,"thursday":true,"friday":true,"saturday":true,"x":1335,"y":525,"wires":[["b5e28bb9a324bcd2"]]},{"id":"b5e28bb9a324bcd2","type":"moment","z":"62f33b91447bf1c4","name":"Add 30 seconds","topic":"","input":"payload","inputType":"msg","inTz":"ETC/UTC","adjAmount":"10","adjType":"seconds","adjDir":"add","format":"YYYY-MM-DD HH:mm:ss","locale":"En","output":"payload","outputType":"msg","outTz":"America/Chicago","x":1585,"y":525,"wires":[["7739dfb4c9d275eb"]]},{"id":"7739dfb4c9d275eb","type":"api-call-service","z":"62f33b91447bf1c4","name":"Set test2","server":"ab3e2c53.e3491","version":7,"debugenabled":false,"action":"input_datetime.set_datetime","floorId":[],"areaId":[],"deviceId":[],"entityId":["input_datetime.test2"],"labelId":[],"data":"{\"datetime\": payload }","dataType":"jsonata","mergeContext":"","mustacheAltTags":false,"outputProperties":[],"queue":"none","blockInputOverrides":false,"domain":"input_datetime","service":"set_datetime","x":1770,"y":525,"wires":[[]]},{"id":"26852d81db7cbbdd","type":"ha-time","z":"62f33b91447bf1c4","name":"input_datetime.test2","server":"ab3e2c53.e3491","version":3,"exposeAsEntityConfig":"","entityId":"input_datetime.test2","property":"state","offset":"0","offsetType":"num","offsetUnits":"minutes","randomOffset":false,"repeatDaily":false,"outputProperties":[{"property":"payload","propertyType":"msg","value":"","valueType":"date"},{"property":"data","propertyType":"msg","value":"","valueType":"entity"},{"property":"topic","propertyType":"msg","value":"","valueType":"triggerId"}],"sunday":true,"monday":true,"tuesday":true,"wednesday":true,"thursday":true,"friday":true,"saturday":true,"x":1335,"y":615,"wires":[["b5e28bb9a324bcd2"]]},{"id":"94a1f3a130a6b952","type":"inject","z":"62f33b91447bf1c4","name":"Simulate button press","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"iso","payloadType":"date","x":1355,"y":435,"wires":[["2fb52b2829bb7654"]]},{"id":"2fb52b2829bb7654","type":"moment","z":"62f33b91447bf1c4","name":"add 15 seconds","topic":"","input":"payload","inputType":"msg","inTz":"ETC/UTC","adjAmount":"15","adjType":"seconds","adjDir":"add","format":"YYYY-MM-DD HH:mm:ss","locale":"En","output":"payload","outputType":"msg","outTz":"America/Chicago","x":1580,"y":435,"wires":[["9fc707bb7aa24b3d"]]},{"id":"9fc707bb7aa24b3d","type":"api-call-service","z":"62f33b91447bf1c4","name":"Set test1","server":"ab3e2c53.e3491","version":7,"debugenabled":false,"action":"input_datetime.set_datetime","floorId":[],"areaId":[],"deviceId":[],"entityId":["input_datetime.test1"],"labelId":[],"data":"{\"datetime\": payload }","dataType":"jsonata","mergeContext":"","mustacheAltTags":false,"outputProperties":[],"queue":"none","blockInputOverrides":false,"domain":"input_datetime","service":"set_datetime","x":1765,"y":435,"wires":[[]]},{"id":"ab3e2c53.e3491","type":"server","name":"AvilaSmartHome","version":5,"addon":true,"rejectUnauthorizedCerts":true,"ha_boolean":"y|yes|true|on|home|open","connectionDelay":true,"cacheJson":true,"heartbeat":false,"heartbeatInterval":30,"areaSelector":"friendlyName","deviceSelector":"friendlyName","entitySelector":"friendlyName","statusSeparator":"at: ","statusYear":"hidden","statusMonth":"short","statusDay":"numeric","statusHourCycle":"h23","statusTimeFormat":"h:m","enableGlobalContextStore":true}] ``` ### Environment Information Version: 0.72.2 Home Assistant version: 2024.9.1 Companion version: 4.1.0 Node-RED version: 4.0.2 Docker: yes Add-on: no Node.js version: v18.20.3 x64 linux OS: Linux 6.6.46-haos x64 ### Additional context _No response_

mikep99 · September 17, 2024, 10:39am

Thanks Jim - I’ve also had similar issues over the last few days which seem to have come around since updating to v4.0.2

nappyjim · September 21, 2024, 3:05am

This was fixed in node-red-contrib-home-assistant-websocket v0.73.0

nappyjim · October 1, 2024, 12:57am

@Mikefila now that I got this working for its intended purpose, I would like to use it for another purpose.

That being, using it as a timer for my garden watering system.

See the graphic and attached flow. What I have setup is a button, an input_number, and an input_datetime. What I would like it when the button is pressed, it looks at the value of input_number and then tranfers that to the date/time formatter node to be put into the input_datetime.

My question is; is there a way to have the value of the input_number be used for the date/time formatter node? So if input_number = 5, I want the date/time formatter node set the input_datetime 5 minutes in the future.

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Mikefila · October 1, 2024, 3:11pm

It doesn’t look like the node accepts a variable for the adjustment value. You can though use the moment func as jsonata. This will add days based on the number in the input helper.

$moment().add($entity().state, 'd')

edit: removed extra word