Option to disable continuous light color saving, avoiding flickering

code/espurna/config/general.h

@@ -486,6 +486,10 @@ PROGMEM const char* const custom_reset_string[] = {
 // 4 channels => RGBW
 // 5 channels => RGBWW
 
+#ifndef LIGHT_SAVE_ENABLED
+#define LIGHT_SAVE_ENABLED      1           // Light channel values saved by default after each change
+#endif
+
 #define LIGHT_SAVE_DELAY        5           // Persist color after 5 seconds to avoid wearing out
 #define LIGHT_PWM_FREQUENCY     1000        // PWM frequency
 #define LIGHT_MAX_PWM           4095        // Maximum PWM value

code/espurna/light.ino

@@ -272,7 +272,7 @@ void _lightColorSave() {
 
 void _lightColorRestore() {
     for (unsigned int i=0; i < _channels.size(); i++) {
-        _channels[i].value = getSetting("ch", i, 0).toInt();
+        _channels[i].value = getSetting("ch", i, i==0 ? 255 : 0).toInt();
     }
     _brightness = getSetting("brightness", LIGHT_MAX_BRIGHTNESS).toInt();
     lightUpdate(false, false);
@@ -415,11 +415,19 @@ void lightUpdate(bool save, bool forward) {
     }
     #endif
 
-    // Delay saving to EEPROM 5 seconds to avoid wearing it out unnecessarily
-    if (save) colorTicker.once(LIGHT_SAVE_DELAY, _lightColorSave);
+    #if LIGHT_SAVE_ENABLED
+        // Delay saving to EEPROM 5 seconds to avoid wearing it out unnecessarily
+        if (save) colorTicker.once(LIGHT_SAVE_DELAY, _lightColorSave);
+    #endif
 
 };
 
+#if LIGHT_SAVE_ENABLED == 0
+void lightSave() {
+    _lightColorSave();
+}
+#endif
+
 void lightState(bool state) {
     _lightState = state;
 }

code/espurna/web.ino

@@ -428,6 +428,13 @@ void _wsParse(AsyncWebSocketClient *client, uint8_t * payload, size_t length) {
             #if POWER_PROVIDER != POWER_PROVIDER_NONE
                 powerConfigure();
             #endif
+
+            #if LIGHT_PROVIDER != LIGHT_PROVIDER_NONE
+                #if LIGHT_SAVE_ENABLED == 0
+                    lightSave();
+                #endif
+            #endif
+
             #if NTP_SUPPORT
                 if (changedNTP) ntpConnect();
             #endif