Add %topic% to rules

[to-scho]

Have you look for this feature in other issues and in the wiki?
yes

Is your feature request related to a problem? Please describe.
One need device specific rules to have consistent MQTT topic namings like "stat/my-sonoff/my-stat when publishing MQTT in rules. I have 10+ devices using same rules and run out of var/mem when working around.

Describe the solution you'd like
Allow usage of %topic%, %prefix" and %grouptopic% in rules.

Describe alternatives you've considered
Store %topic% in e.g. %mem1% allows same rules and easy update for a bunch of devices.

Additional context
Add any other context or screenshots about the feature request here.

(Please, remember to close the issue when the problem has been addressed)

[arendst]

Storing a topic in %mem% won't be implemented any time soon as currently mem variables allow up to 10 characters while %topic% could be up to 33 characters. Mems were meant for numbers only.

[to-scho]

That's why I currently need multiple mems to store topic. Sorry to not been precise enough, request is not to store %topic% in mem but to allow usage of %topic% in publish command.

[il300]

This functionality is also needed. I have several identical devices with the same rules. It is necessary to distinguish them. The best way through the settings. Different rules are not the best choice.

[gooman-uk]

Likewise - would be very useful for the same reason as mentioned by @il300

[andikt]

Yes, please, this would be a valuable feature. I also have multiple devices and want to use the same rules...

[gemu2015]

have a look at this tread =>#5689

its easy with a script

[Jason2866]

Please close this issue. Script is supported now by Tasmota

[ascillato2]

Closing this issue as there is now a workaround using scripting. Please, check the documentation for an example for doing this. Thanks

[ascillato2]

Merged PR #7106 for adding %topic% as a new variable for rules.