Tasmota: Add the possibility to send POWER state on MQTT at periodic time

[schmurtzm]

It could be useful to have a parameter to force Tasmota to send on MQTT his current POWER state at periodic time.

For example a console command line like this to force the publication every 30 seconds :
ForcePowerStatePublication 30

With Home Assistant you need to force the check of the state at start (see "Power state on start-up without retain option") or use PowerRetain on to get MQTT persistent message.

It means that to be sure to have the right state at Home Assistant start you need to make configuration on HA. :(

Thanks for your awesome work ;)

[ascillato2]

Hi,

Why you want that? There is no need to send periodically the status of relays. Tasmota sends it when they change. Also with the example (https://github.com/arendst/Sonoff-Tasmota/wiki/Home-Assistant#power-state-on-start-up-without-retain-option) you can make HA to check all devices at once at startup.

If anyway you want to send that, you can use a rule to perform that action (using last Tasmota version).

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[schmurtzm]

Just for answer to your question, you can make a simple test to reproduce the issue with home assistant :
1 - power on the sonoff/tasmota
2 - shutdown your MQTT server
3 - switch off the sonoff
4 - restart your MQTT server

Now you're in a state where you have Sonoff powered "off" with "on" state on Home Assistant so the state is not totally reliable.
I'm going to make it works with rules...
Edit Finally I use a workaround : I check with a repeated home assistant automation... But I still think that this parameter could be useful ;)

[ascillato]

Hi,

I use home assistant and I have set exactly as the example (https://github.com/arendst/Sonoff-Tasmota/wiki/Home-Assistant#power-state-on-start-up-without-retain-option)

So, If I do like you said, my Home Assistant will know the exact real status of all my Tasmotas.

[schmurtzm]

I would say "no".
This example show how to refresh the state at home assistant start. In the test that I give previously I don't reboot home assistant but just the MQTT server so this automation is never executed and the status will not be exact.
A workaround is to repeat this automation at periodic time like this :

  alias: "Power state on HA start-up & later"
  trigger:
  - platform: homeassistant
    event: start
  - platform: time
    minutes: '/5'
    seconds: 00 
  action:
    - service: mqtt.publish
      data:
        topic: "cmnd/sonoffs/power1"
        payload: ""
# If you have more : like sonoff 4CH...
    - service: mqtt.publish
      data:
        topic: "cmnd/sonoffs/power2"
        payload: ""

Not so complex but it is a workaround... ;)

[benzino77]

How about that? This will report every 30 sec power information equal to teleperiod state message

rule1 
on system#boot do
   ruletimer1 30
endon
on rules#timer=1 do
   backlog status11; ruletimer1 30
endon

or other approach:

on system#boot do
   ruletimer1 30
endon
on rules#timer=1 do
   backlog power1;power2;ruletimer1 30
endon

You can use mem1 to mem5 to make the PowerStatePublicationPeriod changeable by user without rewriting the rule.

[juan11perez]

@benzino77
thank you for this instruction. works great.