Set a Timer for Day of Month

[ZhuDaHai]

Probably another dumb question of me, but looking at the Timers doc for Tasmota, I don't see any way to set a Day-of-Month for a timer: https://tasmota.github.io/docs/Timers/

I want to set a timer on an outlet socket to turn off on the first day of every month and then turn back on a minute later. This is to reset a modem that after a few months 'forgets' to let anything connect to it.

What am I missing?

Thanks!

[gfn256]

Make a rule that checks for uptime of 30 days, and then resets the modem, and then resets itself.

example:

rule1 on tele-UptimeSec>2592000 DO backlog power1 0; delay 600; power1 1; restart 1 endon

rule1 1

Please note I haven't checked if it works - do it yourself
Also note that the timing starts from whenever the tasmota device is turned on. So if the device is ever reset, the 30 day timer will start again.

[barbudor]

On an esp8266 based device you may have more possibilities by switching from rules to Scripting Language
Requires either a custom build or the unofficial Tasmota-scripting.bin.gz binary

[sfromis]

For much better facilities for setting up a schedule, you could run Tasmota on a device based on ESP32, where you have the language Berry including the very flexible cron feature, making such things easy to do.

[ZhuDaHai]

Oh dear. I totally missed that warning at the top of the Scripting docs, and had already hashed out a first-draft script:

>D
>S
if day==1 and hours==1 and mins==1 and secs>40 and secs<42
then =>power1 0
if day==1 and hours==1 and mins==2 and secs>0 and secs<2
then ->power1 1

I guess I'll dig more into rules...
Thanks!

[sfromis]

With rules, you can also make a trigger based on a string-contains match, like on Time$|-26T00:0 do ... endon which will trigger on a JSON payload (like .../STATE at TelePeriod) with a time stamp where the date ends in -26 and the time starts with 00:0 meaning up to 10 minutes past midnight. Modify for other times.

[ZhuDaHai]

So, sometime link this:
rule1 on time$|-01T01:00:0 DO power1 0; delay 200; power1 1; endon

On the first day of the month at 1am, power off, wait 20 seconds and power on.

[ZhuDaHai]

So, I'm trying this rule to turn the switch off at 50 sec mark every minute and then back on again after 20 seconds. But its not doing anything :(
rule1 on Time$>:50 DO backlog power1 0; delay 200; power1 1; endon

[sfromis]

Well, I carefully chose my example to avoid an issue you'd be getting into. It only works in case of a message being published at that time, within 10 seconds after 01:00, or in your additional example, at exactly second 50. Tasmota will publish messages by TelePeriod, default every 5 minutes, not continuously. That's why I wrote "will trigger on a JSON payload".

However, you can make your first example work using an additional rule like this:
rule1 on Time#Minute==60 do Status 7 endon on time$|-01T01:00:0 DO ...
This will execute that command ( Status 7 is not the only option) at 01:00:00, generating a payload for the other rule to react to.

Beware that your usage of Delay is not reliable if you want to be sure of 20 seconds, as the interval can be cut short by other things happening.

[sfromis]

Beware that if you want to avoid the trigger firing more than once at the pertinent time, you may want to also activate one-shot, Rule1 5, and put any additional rule to generate a payload to react to into a separate rule set, like Rule2

[ZhuDaHai]

Well, I got a lot more to read up on as this is making my head spin.
Thank you for all your help! I'll read up on the all the Status command and Rule1 settings.

[gemu2015]

it is very easy with a script.

>D
mo=0
t:timer=-1
>S
; be sure that time is set
if year<2022 {
break
}
mo=month
if chg[mo]>0 {
print month has changed, power off
=>power1 0
; set timer to 10 seconds
timer=10
}

; check if timer has counted to zero
if timer==0 {
; Power on again
timer=-1
=>power1 1
}

[ZhuDaHai]

Beware that if you want to avoid the trigger firing more than once at the pertinent time, you may want to also activate one-shot, Rule1 5, and put any additional rule to generate a payload to react to into a separate rule set, like Rule2

Ok, so something like this?

Rule1 on Time#Minute=60 do backlog Rule2 5; Status 7; endon
Rule1 1

Rule2 on time$|-01T do backlog power1 0; delay 300; power1 1; endon

Rule1 runs every day at 60 minutes past midnight. It then sets Rule2 to run only once and executes Status 7 which then triggers Rule2 to check for the first day of the month, and then turn the switch off, wait ~30 seconds, and turn it back on.

Did I get it even close to correct?
Thanks!

[ZhuDaHai]

Well, I don't get it. I tried this as a test and it doesn't do anything:

Rule1 on Time#Minute|3 do backlog Rule2 5; Status 7; endon
Rule1 1

Rule2 on Local$|-27T do backlog power1 0; delay 300; power1 1; endon
Rule2 5

I tried Rule2 with "Local" and "time" as Status 7 shows 'Local' in the response instead of Time

[barbudor]

If Rule1 has 'once' set and it already been triggered once today it won't trigger again
So you need to clear the 'once' with Rule1 4 and re-enable it with 'Rule1 5' to re-arm the 'once'

[barbudor]

I think there is a slightly more straigh forward way with neither 'once' nor Status 7

Rule1 
  on Time#Minute=60 do event checkdate %timestamp% endon
  on event#checkdate$|-01T do backlog power1 0; ruletimer1 3 endon
  on Rules#Timer=1 do power1 1 endon
Rule1 1

And if you only use that relay to reboot the modem you can even do:

Rule1 
  on Time#Minute=60 do event checkdate %timestamp% endon
  on event#checkdate$|-01T do backlog power1 0 endon
Rule1 1
Pulsetime 30
PoweOnState 5

Which let Tasmota manage the 3 seconds delay automatically

[ZhuDaHai]

Rule1 0
Rule1 ""
Rule2 0
Rule2 ""
Rule1 4

Then re-entered the 3min test rules above.

Rule1 on StatusTIM#Local$|-27T do backlog power1 0; delay 300; power1 1; endon
Rule2 on Time#Minute|3 do Status 7; endon
Rule1 1
Rule2 1

Rule2 executes and triggers Status 7. Rule1 never executes. So, thanks anyway. It's beyond my abilities

[barbudor]

If you don't enable Rule1 1 it will never be triggered

You have 2 independant things

• The rule should be enabled : Rule1 1
• The rule should have the "once" mode enabled : Rule1 5

When you type 'Rule1' to see the rule status you will see that there are 2 fields:
"State":"OFF","Once":"OFF"
State is controled by Rule1 1 (on) and Rule1 0 (off)
Once is controled by Rule1 5 (on) and Rule1 4 (off)
Even the "once" will never be fired if the rule is not enabled at all

Whatever see my latest proposal which is way simpler

[ZhuDaHai]

Whatever see my latest proposal which is way simpler

Here's the results of your first script:

09:17:23.258 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T09:17:23","Uptime":"0T00:00:11","UptimeSec":11,"Heap":23,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":34,"MqttCount":1,"POWER":"OFF","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":66,"Signal":-67,"LinkCount":1,"Downtime":"0T00:00:05"}}
09:22:23.391 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T09:22:23","Uptime":"0T00:05:11","UptimeSec":311,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER":"OFF","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":62,"Signal":-69,"LinkCount":1,"Downtime":"0T00:00:05"}}
09:22:43.512 CMD: Rule1 on Time#Minute|3 do event checkdate %timestamp% endon on event#checkdate$|-28T do backlog power1 0; ruletimer1 3 endon on Rules#Timer=1 do power1 1 endon
09:22:43.524 RUL: Stored uncompressed, would compress from 153 to 102 (-33%)
09:22:43.529 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"OFF","Once":"OFF","StopOnError":"OFF","Length":153,"Free":358,"Rules":"on Time#Minute|3 do event checkdate %timestamp% endon on event#checkdate$|-28T do backlog power1 0; ruletimer1 3 endon on Rules#Timer=1 do power1 1 endon"}}
09:22:47.234 CMD: Rule1 1
09:22:47.241 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":153,"Free":358,"Rules":"on Time#Minute|3 do event checkdate %timestamp% endon on event#checkdate$|-28T do backlog power1 0; ruletimer1 3 endon on Rules#Timer=1 do power1 1 endon"}}
09:24:00.398 RUL: TIME#MINUTE|3 performs "backlog event checkdate 2023-01-28T09:24:00"
09:24:00.438 MQT: stat/sonoff-01/RESULT = {"Event":"Done"}
09:27:00.406 RUL: TIME#MINUTE|3 performs "backlog event checkdate 2023-01-28T09:27:00"
09:27:00.446 MQT: stat/sonoff-01/RESULT = {"Event":"Done"}
09:27:12.381 APP: Serial logging disabled
09:27:23.378 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T09:27:23","Uptime":"0T00:10:11","UptimeSec":611,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":24,"MqttCount":1,"POWER":"OFF","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":72,"Signal":-64,"LinkCount":1,"Downtime":"0T00:00:05"}}
09:30:00.406 RUL: TIME#MINUTE|3 performs "backlog event checkdate 2023-01-28T09:30:00"
09:30:00.447 MQT: stat/sonoff-01/RESULT = {"Event":"Done"}

The socket never turned off or on.

[ZhuDaHai]

This is the log from the "Status 7" rules previously suggested:

09:38:32.353 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T09:38:32","Uptime":"0T00:00:18","UptimeSec":18,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":100,"MqttCount":1,"POWER":"OFF","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":70,"Signal":-65,"LinkCount":1,"Downtime":"0T00:00:11"}}
09:38:39.837 CMD: Rule1 on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1; endon
09:38:39.842 RUL: Stored uncompressed, would compress from 72 to 56 (-22%)
09:38:39.846 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"OFF","Once":"OFF","StopOnError":"OFF","Length":72,"Free":439,"Rules":"on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1; endon"}}
09:38:47.409 CMD: Rule2 on Time#Minute|3 do Status 7; endon
09:38:47.413 RUL: Stored uncompressed, would compress from 35 to 28 (-21%)
09:38:47.418 MQT: stat/sonoff-01/RESULT = {"Rule2":{"State":"OFF","Once":"OFF","StopOnError":"OFF","Length":35,"Free":476,"Rules":"on Time#Minute|3 do Status 7; endon"}}
09:38:54.474 CMD: Rule1 1
09:38:54.481 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":72,"Free":439,"Rules":"on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1; endon"}}
09:39:00.694 CMD: Rule2 1
09:39:00.702 MQT: stat/sonoff-01/RESULT = {"Rule2":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":35,"Free":476,"Rules":"on Time#Minute|3 do Status 7; endon"}}
09:39:16.333 RUL: TIME#MINUTE|3 performs "Status 7;"
09:39:16.341 MQT: stat/sonoff-01/STATUS7 = {"StatusTIM":{"UTC":"2023-01-28T01:39:16","Local":"2023-01-28T09:39:16","StartDST":"2023-03-26T02:00:00","EndDST":"2023-10-29T03:00:00","Timezone":"+08:00","Sunrise":"06:48","Sunset":"17:24"}}
09:42:00.326 RUL: TIME#MINUTE|3 performs "Status 7;"
09:42:00.335 MQT: stat/sonoff-01/STATUS7 = {"StatusTIM":{"UTC":"2023-01-28T01:42:00","Local":"2023-01-28T09:42:00","StartDST":"2023-03-26T02:00:00","EndDST":"2023-10-29T03:00:00","Timezone":"+08:00","Sunrise":"06:48","Sunset":"17:24"}}
09:43:32.322 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T09:43:32","Uptime":"0T00:05:18","UptimeSec":318,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER":"OFF","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":62,"Signal":-69,"LinkCount":1,"Downtime":"0T00:00:11"}}

Again, the switch does not turn off or on and only Rule1 executes even though both are set to: "State":"ON","Once":"OFF","StopOnError":"OFF"

[ZhuDaHai]

I enabled one-shot for Rule1, but it still won't execute:

09:54:19.321 CMD: Rule1 5
09:54:19.328 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"ON","Once":"ON","StopOnError":"OFF","Length":72,"Free":439,"Rules":"on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1; endon"}}
09:57:00.346 RUL: TIME#MINUTE|3 performs "Status 7;"
09:57:00.358 MQT: stat/sonoff-01/STATUS7 = {"StatusTIM":{"UTC":"2023-01-28T01:57:00","Local":"2023-01-28T09:57:00","StartDST":"2023-03-26T02:00:00","EndDST":"2023-10-29T03:00:00","Timezone":"+08:00","Sunrise":"06:48","Sunset":"17:24"}}
09:57:32.928 CMD: Rule1
09:57:32.936 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"ON","Once":"ON","StopOnError":"OFF","Length":72,"Free":439,"Rules":"on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1; endon"}}

[ZhuDaHai]

Interesting results...

Works everytime:

Rule1 on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1 endon
Rule2 on Time#Minute|3 do backlog Status 7 endon
Rule1 1
Rule2 1

10:46:21.417 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T10:46:21","Uptime":"0T00:00:12","UptimeSec":12,"Heap":23,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":79,"MqttCount":1,"POWER":"ON","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":94,"Signal":-53,"LinkCount":1,"Downtime":"0T00:00:05"}}
10:46:40.172 CMD: Rule1 on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1 endon
10:46:40.178 RUL: Stored uncompressed, would compress from 71 to 55 (-23%)
10:46:40.182 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"OFF","Once":"OFF","StopOnError":"OFF","Length":71,"Free":440,"Rules":"on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1 endon"}}
10:46:47.379 CMD: Rule2 on Time#Minute|3 do backlog Status 7 endon
10:46:47.384 RUL: Stored uncompressed, would compress from 42 to 32 (-24%)
10:46:47.389 MQT: stat/sonoff-01/RESULT = {"Rule2":{"State":"OFF","Once":"OFF","StopOnError":"OFF","Length":42,"Free":469,"Rules":"on Time#Minute|3 do backlog Status 7 endon"}}
10:46:54.270 CMD: Rule1 1
10:46:54.277 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":71,"Free":440,"Rules":"on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1 endon"}}
10:47:00.395 CMD: Rule2 1
10:47:00.403 MQT: stat/sonoff-01/RESULT = {"Rule2":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":42,"Free":469,"Rules":"on Time#Minute|3 do backlog Status 7 endon"}}
10:48:00.434 RUL: TIME#MINUTE|3 performs "backlog Status 7"
10:48:00.475 MQT: stat/sonoff-01/STATUS7 = {"StatusTIM":{"UTC":"2023-01-28T02:48:00","Local":"2023-01-28T10:48:00","StartDST":"2023-03-26T02:00:00","EndDST":"2023-10-29T03:00:00","Timezone":"+08:00","Sunrise":"06:48","Sunset":"17:24"}}
10:48:00.501 RUL: STATUSTIM#LOCAL$|-28T performs "backlog power1 0; delay 300; power1 1"
10:48:00.525 MQT: stat/sonoff-01/RESULT = {"POWER":"OFF"}
10:48:00.528 MQT: stat/sonoff-01/POWER = OFF (retained)
10:48:00.725 MQT: stat/sonoff-01/RESULT = {"Delay":300}
10:48:30.757 MQT: stat/sonoff-01/RESULT = {"POWER":"ON"}
10:48:30.760 MQT: stat/sonoff-01/POWER = ON (retained)
10:51:00.402 RUL: TIME#MINUTE|3 performs "backlog Status 7"
10:51:00.443 MQT: stat/sonoff-01/STATUS7 = {"StatusTIM":{"UTC":"2023-01-28T02:51:00","Local":"2023-01-28T10:51:00","StartDST":"2023-03-26T02:00:00","EndDST":"2023-10-29T03:00:00","Timezone":"+08:00","Sunrise":"06:48","Sunset":"17:24"}}
10:51:00.469 RUL: STATUSTIM#LOCAL$|-28T performs "backlog power1 0; delay 300; power1 1"
10:51:00.489 MQT: stat/sonoff-01/RESULT = {"POWER":"OFF"}
10:51:00.492 MQT: stat/sonoff-01/POWER = OFF (retained)
10:51:00.691 MQT: stat/sonoff-01/RESULT = {"Delay":300}
10:51:21.418 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T10:51:21","Uptime":"0T00:05:12","UptimeSec":312,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER":"OFF","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":96,"Signal":-52,"LinkCount":1,"Downtime":"0T00:00:05"}}
10:51:30.713 MQT: stat/sonoff-01/RESULT = {"POWER":"ON"}
10:51:30.717 MQT: stat/sonoff-01/POWER = ON (retained)

---

Does not work if 'backlog' removed from Rule2 (even though there is only one Command)

Rule1 on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1 endon
Rule2 on Time#Minute|3 do Status 7 endon
Rule1 1
Rule2 1

11:01:53.760 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T11:01:53","Uptime":"0T00:00:38","UptimeSec":38,"Heap":25,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER":"ON","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":96,"Signal":-52,"LinkCount":1,"Downtime":"0T00:00:03"}}
11:02:10.583 CMD: Rule1 on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1 endon
11:02:10.589 RUL: Stored uncompressed, would compress from 71 to 55 (-23%)
11:02:10.593 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"OFF","Once":"OFF","StopOnError":"OFF","Length":71,"Free":440,"Rules":"on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1 endon"}}
11:02:17.990 CMD: Rule2 on Time#Minute|3 do Status 7 endon
11:02:17.994 RUL: Stored uncompressed, would compress from 34 to 27 (-21%)
11:02:17.999 MQT: stat/sonoff-01/RESULT = {"Rule2":{"State":"OFF","Once":"OFF","StopOnError":"OFF","Length":34,"Free":477,"Rules":"on Time#Minute|3 do Status 7 endon"}}
11:02:24.880 CMD: Rule1 1
11:02:24.887 MQT: stat/sonoff-01/RESULT = {"Rule1":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":71,"Free":440,"Rules":"on StatusTIM#Local$|-28T do backlog power1 0; delay 300; power1 1 endon"}}
11:02:31.400 CMD: Rule2 1
11:02:31.407 MQT: stat/sonoff-01/RESULT = {"Rule2":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":34,"Free":477,"Rules":"on Time#Minute|3 do Status 7 endon"}}
11:03:00.777 RUL: TIME#MINUTE|3 performs "Status 7"
11:03:00.785 MQT: stat/sonoff-01/STATUS7 = {"StatusTIM":{"UTC":"2023-01-28T03:03:00","Local":"2023-01-28T11:03:00","StartDST":"2023-03-26T02:00:00","EndDST":"2023-10-29T03:00:00","Timezone":"+08:00","Sunrise":"06:48","Sunset":"17:24"}}
11:06:00.800 RUL: TIME#MINUTE|3 performs "Status 7"
11:06:00.808 MQT: stat/sonoff-01/STATUS7 = {"StatusTIM":{"UTC":"2023-01-28T03:06:00","Local":"2023-01-28T11:06:00","StartDST":"2023-03-26T02:00:00","EndDST":"2023-10-29T03:00:00","Timezone":"+08:00","Sunrise":"06:48","Sunset":"17:24"}}
11:06:54.778 MQT: tele/sonoff-01/STATE = {"Time":"2023-01-28T11:06:54","Uptime":"0T00:05:39","UptimeSec":339,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER":"ON","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":96,"Signal":-52,"LinkCount":1,"Downtime":"0T00:00:03"}}

The docs say "To accomplish a rule with one trigger but several commands, you need to use Backlog:", but it appears that for at least this instance, its always required.

P.S. I did a:

Rule1 0
Rule2 0
Rule1 ""
Rule2 ""

And rebooted the switch between each test

[barbudor]

You don't need 2 rules
The only thing that was missing in my last proposal was an equal signal with te command event. A curious mind could also have spotted that by looking at the doc of event (hum, ok, it's well hidden, doc would need an edit there)

09:39:28.131 CMD: rule3 on Time#Minute|2 do event checkdate=%timestamp% endon on event#checkdate$|-28T do Power1 0 endon
09:39:28.138 RUL: Stored uncompressed, would compress from 96 to 65 (-32%)
09:39:28.143 MQT: stat/skt-barbuxps/RULE = {"Rule3":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":96,"Free":415,"Rules":"on Time#Minute|2 do event checkdate=%timestamp% endon on event#checkdate$|-28T do Power1 0 endon"}}
09:40:00.532 RUL: TIME#MINUTE|2 performs "backlog event checkdate=2023-01-28T09:40:00+01:00"
09:40:00.568 MQT: stat/skt-barbuxps/EVENT = {"Event":"Done"}
09:40:00.604 RUL: EVENT#CHECKDATE$|-28T performs "Power1 0"
09:40:00.610 MQT: stat/skt-barbuxps/POWER = {"POWER":"OFF"}
09:40:00.615 MQT: stat/skt-barbuxps/POWER = OFF (retained)

Rule3 enabled with Rule3 1 and that's all. No need for "once".

Note I'm using Rule3 for that exemple because I already have Rule1 and Rule2 in use on that device and I don't want to break them. The Rule index doesn't matter at all

And using PulseTime 30 and PowerOnState 5 Tasmota will automatically generate an OFF for 3 seconds and recover ON after that delay. No need for Delay nor RulesTimer

[barbudor]

OK, "Sonoff S2X" doesn't support that.
"Sonoff Basic (1)" does.
And "Plug V by MJ" does
So, I'll switch to one of the two plug/sockets that does support that and give it a go

I'm surprised, I don't see why it wouldn't be supported. Where do you see that or make you believe that ?

If for some reason you are correct, you can still use RuleTimer

on Time#Minute|2 do event checkdate=%timestamp% endon 
on event#checkdate$|-28T do backlog Power1 0; RuleTimer1 3 endon
on Rules#Timer=1 do Power1 1 endon

All in the same ruleset

[ZhuDaHai]

I'm surprised, I don't see why it wouldn't be supported.

I'm an idiot and can't spell "Power" ...

[barbudor]

As we say here "It all happens once to the best of us"

A last comment:

• Using PulseTime and PowerOnState 5 are great if all you ever want is to have a X seconds OFF pulse but never want to totally shutdown the modem manually. Becuase even clicking on the Power button on the Web UI will be followed by an automatic Power ON after X seconds
• The RuleTimer way allows to keep the complete ON/OFF control and only let the Rule do the off-pulse

I'm using PowerOnState 5 / PulseTime on a plug to control the router/modem of my mom's house remotely
So when I see the network is behaving strangely I can remotely send a "power off" command and I know that Tasmota will turn it ON again after X seconds because from the instant the router is turned OFF, I'm loosing the remote control

[ZhuDaHai]

I'm using PowerOnState 5 / PulseTime on a plug to control the router/modem of my mom's house remotely
So when I see the network is behaving strangely I can remotely send a "power off" command and I know that Tasmota will turn it ON again after X seconds because from the instant the router is turned OFF, I'm loosing the remote control

That's pretty much exactly what I'm trying to do, but just schedule it monthly. The fact that your script allows just a Power1 0 and it will automatically power it back on after PulseTime is an added bonus.

I did get it working. I don't know if the first 'backlog' is necessary, but I added it anyway as it doesn't seem to break anything:

18:14:55.463 MQT: tele/sonoff-kossel/STATE = {"Time":"2023-01-28T18:14:55","Uptime":"0T00:00:10","UptimeSec":10,"Heap":27,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":36,"MqttCount":1,"POWER1":"ON","Wifi":{"AP":1,"SSId":"Loki","BSSId":"30:23:03:B7:0D:FA","Channel":1,"Mode":"11n","RSSI":62,"Signal":-69,"LinkCount":1,"Downtime":"0T00:00:03"}}
18:15:11.026 CMD: PowerOnState 5
18:15:11.032 MQT: stat/sonoff-kossel/RESULT = {"PowerOnState":5}
18:15:18.276 CMD: Pulsetime 130
18:15:18.281 MQT: stat/sonoff-kossel/RESULT = {"PulseTime1":{"Set":130,"Remaining":130}}
18:15:29.687 CMD: Rule3 on Time#Minute|3 do backlog event checkdate=%timestamp% endon on event#checkdate$|-28T do backlog power1 0 endon
18:15:29.694 RUL: Stored uncompressed, would compress from 112 to 71 (-37%)
18:15:29.700 MQT: stat/sonoff-kossel/RESULT = {"Rule3":{"State":"OFF","Once":"OFF","StopOnError":"OFF","Length":112,"Free":399,"Rules":"on Time#Minute|3 do backlog event checkdate=%timestamp% endon on event#checkdate$|-28T do backlog power1 0 endon"}}
18:15:37.333 CMD: Rule3 1
18:15:37.340 MQT: stat/sonoff-kossel/RESULT = {"Rule3":{"State":"ON","Once":"OFF","StopOnError":"OFF","Length":112,"Free":399,"Rules":"on Time#Minute|3 do backlog event checkdate=%timestamp% endon on event#checkdate$|-28T do backlog power1 0 endon"}}
18:15:46.454 RUL: TIME#MINUTE|3 performs "backlog event checkdate=2023-01-28T18:15:46"
18:15:46.489 MQT: stat/sonoff-kossel/RESULT = {"Event":"Done"}
18:15:46.516 RUL: EVENT#CHECKDATE$|-28T performs "backlog power1 0"
18:15:46.538 MQT: stat/sonoff-kossel/RESULT = {"POWER1":"OFF"}
18:15:46.541 MQT: stat/sonoff-kossel/POWER1 = OFF
18:16:16.551 MQT: stat/sonoff-kossel/RESULT = {"POWER1":"ON"}
18:16:16.553 MQT: stat/sonoff-kossel/POWER1 = ON
18:18:00.433 RUL: TIME#MINUTE|3 performs "backlog event checkdate=2023-01-28T18:18:00"
18:18:00.472 MQT: stat/sonoff-kossel/RESULT = {"Event":"Done"}
18:18:00.496 RUL: EVENT#CHECKDATE$|-28T performs "backlog power1 0"
18:18:00.521 MQT: stat/sonoff-kossel/RESULT = {"POWER1":"OFF"}
18:18:00.524 MQT: stat/sonoff-kossel/POWER1 = OFF
18:18:30.613 MQT: stat/sonoff-kossel/RESULT = {"POWER1":"ON"}
18:18:30.616 MQT: stat/sonoff-kossel/POWER1 = ON

"PulseTime" is an odd setting. Originally I had 300 for 30 seconds only to read up later that "130" is 30 seconds!

Thanks for all your help!
I now have 2 working versions and a much better (but incomplete) understanding of Tasmota rules
Cheers!

[ZhuDaHai]

There are two answers/working Rules for this question. Both scripts turn off the plug/socket at 1am on the first day of every month and then turn it back on after 30 seconds.

The first one is courtesy of sfromis :

Rule1 on StatusTIM#Local$|-01T01 do backlog power1 0; delay 300; power1 1 endon
Rule2 on Time#Minute=60 do backlog Status 7 endon
Rule1 1
Rule2 1

The second one is courtesy of barbudor with an added feature of always turning back on after 30 seconds even if manually turned off with the button on the socket, or via remote command:

Rule1 on Time#Minute=60 do backlog event checkdate=%timestamp% endon on event#checkdate$|-01T01 do backlog power1 0 endon
Rule1 1
Pulsetime 130
PowerOnState 5

Since I received excellent feedback. guidance and support from both of these people with working Rules, I'm marking this as "The Answer" as provided by both of them.
Cheers!