make IRHVAC send incremental changes.

[TMaYaD]

Description:

This change will allow mqtt messages simpler by allowing something like publish cmnd/ir-bridge/IRHVAC {"Power": "On", "Incremental": true}.
The simpler format is required for working with mqtt clients like iotMQTTPanel or similar on android.

Limitations:

• Requires full message be sent at-least once. I work around this with a system#boot rule
• Gets messy with multiple devices. I have only one AC per room, and this doesn't doesn't interfere with other IR devices.

TODO:

• Persist irac_prev_state across reboots.
• Support multiple devices.

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.4.9
• The code change is tested and works with Tasmota core ESP32 V.2.0.7
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass

[TMaYaD]

I do not have an ESP32 IR Blaster to test.

[s-hadinger]

Thanks. I would rather have this in the standard build rather than a compile option. Can we think of a distinct command syntax for incremental? For ex adding a json field like "incremental":true?

[TMaYaD]

My original idea was to leverage Mem<x> (or similar) as stores.

{..., "Storage": "Mem1"} would store and/or retrieve from Mem1. This will allow incremental operations for multiple devices, if desired.

However, I have a lot of learning to do before I understand the code base enough to do that.

[s-hadinger]

Relying on Mem1 sounds overly complicated to me. Why not go back to your original idea, but as a runtime option, not a compile-time option?

[github-actions]

This PR has been automatically marked as stale because it hasn't any activity in last few weeks. It will be closed if no further activity occurs. Thank you for your contributions.

[Jason2866]

@TMaYaD Will you do the changes?

[TMaYaD]

Yes. I'm away on vacation right now. Will get back to it after 14th. Need to be home to test home automation ;)

[TMaYaD]

@Jason2866 Updated and tested on my IR blaster. It turned out to be simpler than I expected.

[github-actions]

This PR has been automatically marked as stale because it hasn't any activity in last few weeks. It will be closed if no further activity occurs. Thank you for your contributions.

[s-hadinger]

bump

[pkkrusty]

Nice improvement. Looking forward to testing this. Will make node-red flows simpler too.