MQTT and HA brightness (#1730)

* MQTT and HA brightness shall only be depended on LIGHT_PROVIDER != LIGHT_PROVIDER_NONE

* remove unnecessary changes

code/espurna/homeassistant.ino

@@ -98,9 +98,10 @@ void _haSendSwitch(unsigned char i, JsonObject& config) {
 
         if (i == 0) {
 
+            config["brightness_state_topic"] = mqttTopic(MQTT_TOPIC_BRIGHTNESS, false);
+            config["brightness_command_topic"] = mqttTopic(MQTT_TOPIC_BRIGHTNESS, true);
+
             if (lightHasColor()) {
-                config["brightness_state_topic"] = mqttTopic(MQTT_TOPIC_BRIGHTNESS, false);
-                config["brightness_command_topic"] = mqttTopic(MQTT_TOPIC_BRIGHTNESS, true);
                 config["rgb_state_topic"] = mqttTopic(MQTT_TOPIC_COLOR_RGB, false);
                 config["rgb_command_topic"] = mqttTopic(MQTT_TOPIC_COLOR_RGB, true);
                 config["color_temp_command_topic"] = mqttTopic(MQTT_TOPIC_MIRED, true);

code/espurna/light.ino

@@ -539,8 +539,9 @@ void _lightMQTTCallback(unsigned int type, const char * topic, const char * payl
 
     if (type == MQTT_CONNECT_EVENT) {
 
+        mqttSubscribe(MQTT_TOPIC_BRIGHTNESS);
+
         if (_light_has_color) {
-            mqttSubscribe(MQTT_TOPIC_BRIGHTNESS);
             mqttSubscribe(MQTT_TOPIC_MIRED);
             mqttSubscribe(MQTT_TOPIC_KELVIN);
             mqttSubscribe(MQTT_TOPIC_COLOR_RGB);