async getHomie() {
        try {
            if (this.isCommand) {
                if (this.lastSetValue === null || this.lastSetValue === undefined) {
                    return null;
                }

                return this.marshalHomie(this.lastSetValue, this.dataType);
            } else {
                return this.marshalHomie(await this.get(), this.dataType);
            }

        } catch (err) {
            Logger.warn("Failed to parse value to be sent for topic " + this.getBaseTopic() + ":", err);
            return null;
        }
    }
Used by MqttController to retrieve the value of this property to be published for Homie

@public
@return {Promise<string|Buffer|null>}