Monthly signal - help please

[Trying_to_learn]

(Brain failure)

I'm wanting a monthly signal to happen at ...... 23:50. (say)
(Sorry.... The rub: last day of the month)

The inject nodes doesn't quite seem to do that.

cronplus may. bigtimer seems possible too.

But I just can't get my head around how to do it.

Someone - please.

[JGKK]

You can use an inject node and a very simple function node.

[{"id":"8a7ca794.3fa14","type":"function","z":"f954564f.03e718","name":"is tomorrow the 1st?","func":"let date = new Date(msg.payload+86400000); //create a date object from the timestamp plus one day\nlet day = date.getDate(); //get the corresponding day\nif(day==1){ //check if tomorrow is the 1st\n    return msg;\n}else{\n    return null; //else do nothing\n}","outputs":1,"noerr":0,"x":440,"y":3840,"wires":[["26e1d7e1.e15c5"]]},{"id":"67f730c5.493e6","type":"inject","z":"f954564f.03e718","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"50 23 * * *","once":false,"onceDelay":0.1,"x":230,"y":3840,"wires":[["8a7ca794.3fa14"]]},{"id":"26e1d7e1.e15c5","type":"debug","z":"f954564f.03e718","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":650,"y":3840,"wires":[]}]

A timestamp is injected at 23:50 everyday and we than check in a function if tomorrow is the first, otherwise we return nothing:

let date = new Date(msg.payload+86400000); //create a date object from the timestamp plus one day
let day = date.getDate(); //get the corresponding day
if(day==1){ //check if tomorrow is the 1st
    return msg;
}else{
    return null; //else do nothing
}

Johannes

[Trying_to_learn]

Ok. Thanks.

I'll look at it.

I'm guessing all those times are local and not Zulu time. (Sorry I have had a few problems with time zones, and just want to be sure.)

[JGKK]

This will be whatever time the machine nodered runs on uses as we generate the Date object from the base of the timestamp from the inject node.

[Trying_to_learn]

Ok. Again: Thanks.

[bakman2]

With cronplus you could use:

[Trying_to_learn]

Ah! I missed the L flag.

[bakman2]

It is not a standard cron feature (ie: not available everywhere), but is a very useful one in this case!

[Trying_to_learn]

Yeah. Thanks.

I was nearly going to make it at 00:10:00 on the first day of the month.
It isn't that critical.

But for the sake of getting it as I want, it is good to know and learn.

[Steve-Mcl]

@bakman2

It is not a standard cron feature (ie: not available everywhere)

While this is not a standard, L is employed by a quite a few cron implementations I've seen, including Quartz.

Its even listed on wikipedia (so it must be popular )

[Trying_to_learn]

Yeah, thanks.

I did google it and did a bit of digging. But I didn't see that mentioned/listed/shown.

Anyway, it is now resolved and again: Thanks to all who responded.