CHANGE: removed some defaults in basemodel, to create less in toJSON

src/app/_models/mqtt-light.ts

@@ -1,8 +1,8 @@
 import { MQTTEntity } from './mqtt_base';
 
 export class MqttLight extends MQTTEntity {
-  pl_on: string = '1';
-  pl_off: string = '0';
+  pl_on: string = '';
+  pl_off: string = '';
   val_tpl: string = '';
   bri_cmd_t: string = 'brightness/command/topic';
   _cmd_t: string = 'command/topic';

src/app/_models/mqtt-sensor.ts

@@ -1,7 +1,7 @@
 import { iMQTTEntityBase, MQTTEntity } from './mqtt_base';
 
 export class MqttSensor extends MQTTEntity implements iMqttSensor {
-  unit_of_meas: string = 'meassure';
+  unit_of_meas: string = '';
   override ent_type: string = 'sensor';
   override attrs: Set<string> = new Set([
     'name',

src/app/_models/mqtt-switch.ts

@@ -21,8 +21,8 @@ export class MqttSwitch extends MQTTEntity {
 
   _dev_cla: DeviceClass = new DeviceClass(['switch', 'outlet']);
   cmd_t: string = 'command/topic';
-  pl_on: string = '1';
-  pl_off: string = '0';
+  pl_on: string = '';
+  pl_off: string = '';
 
   override set name(name: string) {
     super.name = name;