A few fixes

wled00/data/index.htm

@@ -1719,12 +1719,6 @@ function updateUI()
 	updateTrail(d.getElementById('sliderIntensity'));
 	updateTrail(d.getElementById('sliderW'));
 	if (isRgbw) d.getElementById('wwrap').style.display = "block";
-	
-	var btns = d.getElementsByClassName("psts");
-	for (i = 0; i < btns.length; i++) {
-		btns[i].className = btns[i].className.replace(" active", "");
-	}
-	if (currentPreset > 0 && currentPreset <= btns.length) btns[currentPreset -1].className += " active";
 
 	spal = d.getElementById("selectPalette");
 	spal.style.backgroundColor = (spal.selectedIndex > 0) ? "var(--c-6)":"var(--c-3)";
@@ -1876,7 +1870,16 @@ function requestJson(command, rinfo = true, verbose = true) {
 		e2.value = i.pal;
 		if (!command) d.getElementById('Effects').scrollTop = d.getElementById('fxb' + selectedFx).offsetTop - d.getElementById('Effects').clientHeight/1.8;
 
-		if (s.error) showToast('WLED error ' + s.error, true);
+		if (s.error && s.error != 0) {
+      var errstr = "";
+      switch (s.error) {
+        case 10: errstr = "Could not mount filesystem!"; break;
+        case 11: errstr = "Not enough space to save preset!"; break;
+        case 12: errstr = "The requested preset does not exist."; break;
+        case 19: errstr = "A filesystem error has occured."; break;
+      }
+      showToast('Error ' + s.error + ": " + errstr, true);
+    }
 		updateUI();
 	})
 	.catch(function (error) {

wled00/file.cpp

@@ -229,7 +229,8 @@ bool appendObjectToFile(const char* key, JsonDocument* content, uint32_t s, uint
   if (pos == 0) //not found
   {
     DEBUGFS_PRINTLN("not }");
-    while (bufferedFind("}", false)) //find last closing bracket in JSON if not last char
+    f.seek(0);
+    while (bufferedFind("}",false)) //find last closing bracket in JSON if not last char
     {
       pos = f.position();
     }
@@ -237,11 +238,11 @@ bool appendObjectToFile(const char* key, JsonDocument* content, uint32_t s, uint
   DEBUGFS_PRINT("pos "); DEBUGFS_PRINTLN(pos);
   if (pos > 2)
   {
-    f.seek(pos, SeekSet);
+    f.seek(pos -1, SeekSet);
     f.write(',');
   } else { //file content is not valid JSON object
     f.seek(0, SeekSet);
-    f.write('{'); //start JSON
+    f.print('{'); //start JSON
   }
 
   f.print(key);
@@ -266,7 +267,7 @@ bool writeObjectToFile(const char* file, const char* key, JsonDocument* content)
 {
   uint32_t s = 0; //timing
   #ifdef WLED_DEBUG_FS
-    DEBUGFS_PRINTF("Write to %s with key %s >>>\n", file, key);
+    DEBUGFS_PRINTF("Write to %s with key %s >>>\n", file, (key==nullptr)?"nullptr":key);
     serializeJson(*content, Serial); DEBUGFS_PRINTLN();
     s = millis();
   #endif
@@ -337,7 +338,7 @@ bool readObjectFromFile(const char* file, const char* key, JsonDocument* dest)
 {
   if (doCloseFile) closeFile();
   #ifdef WLED_DEBUG_FS
-    DEBUGFS_PRINTF("Read from %s with key %s >>>\n", file, key);
+    DEBUGFS_PRINTF("Read from %s with key %s >>>\n", file, (key==nullptr)?"nullptr":key);
     uint32_t s = millis();
   #endif
   f = WLED_FS.open(file, "r");

wled00/json.cpp

@@ -243,7 +243,7 @@ bool deserializeState(JsonObject root)
     if (ps > 0) {
       deletePreset(ps);
     }
-    ps = root[F("ps")] | -1; //load preset (clears state request!)
+    ps = root["ps"] | -1; //load preset (clears state request!)
     if (ps >= 0) {applyPreset(ps); return stateResponse;}
 
     //HTTP API commands

wled00/presets.cpp

@@ -8,18 +8,22 @@ bool applyPreset(byte index)
 {
   if (fileDoc) {
     errorFlag = readObjectFromFileUsingId("/presets.json", index, fileDoc) ? ERR_NONE : ERR_FS_PLOAD;
+    JsonObject fdo = fileDoc->as<JsonObject>();
+    if (fdo["ps"] == index) fdo.remove("ps"); //remove load request for same presets to prevent recursive crash
     #ifdef WLED_DEBUG_FS
       serializeJson(*fileDoc, Serial);
     #endif
-    deserializeState(fileDoc->as<JsonObject>());
+    deserializeState(fdo);
   } else {
     DEBUGFS_PRINTLN(F("Make read buf"));
     DynamicJsonDocument fDoc(JSON_BUFFER_SIZE);
     errorFlag = readObjectFromFileUsingId("/presets.json", index, &fDoc) ? ERR_NONE : ERR_FS_PLOAD;
+    JsonObject fdo = fileDoc->as<JsonObject>();
+    if (fdo["ps"] == index) fdo.remove("ps");
     #ifdef WLED_DEBUG_FS
       serializeJson(fDoc, Serial);
     #endif
-    deserializeState(fDoc.as<JsonObject>());
+    deserializeState(fdo);
   }
 
   if (!errorFlag) {

wled00/wled.h

@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2011080
+#define VERSION 2011090
 
 // ESP8266-01 (blue) got too little storage space to work with WLED. 0.10.2 is the last release supporting this unit.
 

wled00/wled_eeprom.cpp

@@ -341,7 +341,7 @@ void loadSettingsFromEEPROM()
   for (int i=0;i<15;i++) {
     DMXFixtureMap[i] = EEPROM.read(2535+i);
   } //last used: 2549
-  EEPROM.read(2550, DMXStartLED);
+  DMXStartLED = EEPROM.read(2550);
   #endif
 
   //Usermod memory