FR: Adjust Publish Rate for MQTT

[politekcmo]

It would be fantastic if there was a way to adjust how frequently the ESP publishes to MQTT from the device itself. It's quite fast right now, and that is definitely desirable but I would love to adjust it down for applications that have less bandwidth available.

[politekcmo]

In my testing this works right, but I believe this is a solid way to allow for a customizable delay. Would you mind looking it over? https://github.com/politekcmo/Split-Single-Phase-Energy-Meter

[CircuitSetup]

Adding an actual delay would block other functions from running. A better way to do it would be to compare a publish delay (or publish every x seconds) against millis.

Also, the MQTT library has been changed in the latest version to add one that uses async (so it doesn't block other things from running).

[nightshade00013]

If you are using ESPhome it's simple to include this near the top of the YAML in the substitutions section

update_time: 10s

Then add the following for each sensor under each "- platform:" section
update_interval: ${update_time}

Then all you have to do is change the reporting time to how often you want it to happen. Shouldn't matter if you are using MQTT or the HomeAssistant/ESPhome API's You can also hard set the "update_interval:" on each section individually and disregard the "update_time" setting altogether.

https://github.com/nightshade00013/ESPHome_EnergyMonitor/blob/master/NightShade4chan32.yaml