[ElerotransmitterStick] Add further commands

[micro-bot]

Hi,

I have an idea/request but not the possibility/capability to do it - hope the community can help:

I have a Centero Transmitter Stick built 11.19 paired with my Elero shutters.
With current addon of ElerotransmitterStick I can just move single step and not till upper or lower end.
Some quick tests showed that there are auto-up and auto-down movements implemented in my elero stick:
the commands are 0x21 and 0x41, in general the protocol has not changed but extended / those are not documented in the API from Elero.

My request:
Please add support for auto movement. I checked the code, it would be pretty simple, but I do not have the dev environment to do a pull request. Two files would need a change:

/******** 1st change section in CommandType.java ************/

public enum CommandType {
UP,
UPAUTO,
INTERMEDIATE,
VENTILATION,
DOWN,
DOWNAUTO,
STOP,
INFO,
CHECK,
NONE;

public static CommandType getForPercent(int percentage) {
    if (percentage == 0) {
        return UP;
    }
    
    if (percentage == 10) {
        return UPAUTO;
    }

    if (percentage == 25) {
        return CommandType.INTERMEDIATE;
    }

    if (percentage == 75) {
        return CommandType.VENTILATION;
    }
    
    if (percentage == 90) {
        return DOWNAUTO;
    }
    
    if (percentage == 100) {
        return CommandType.DOWN;
    }

    return null;
}

}

/****** 2nd change: section in CommandUtil.java ******/

private static byte getCommandByte(CommandType command) {
    switch (command) {
        case DOWN:
            return (byte) 0x40;
        case DOWNAUTO:
            return (byte) 0x41;
        case INTERMEDIATE:
            return (byte) 0x44;
        case STOP:
            return (byte) 0x10;
        case UP:
            return (byte) 0x20;
        case UPAUTO:
            return (byte) 0x21;
        case VENTILATION:
            return (byte) 0x24;
        default:
            throw new IllegalArgumentException("Unhandled command type " + command);

    }
}

Thank you in advance!

[lsiepel]

Long standing request that I might fix with a PR. Before I spend time on it, some checks.
@micro-bot can you confirm this issue exists for openHAB 3.4.1 and you are able to perform tests?
Maybe @vbier as codeowner can make a general comment at the suggested code.