diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c9e0ee4..63271ad2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ### Development versions after 0.10.0 release
 
+#### Build 2007020
+
 #### Build 2006251
 
 -   Added `SV=2` to HTTP API, allow selecting single segment only
diff --git a/platformio.ini b/platformio.ini
index 3a5383be..dfee3989 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -165,7 +165,7 @@ lib_deps =
     ESPAsyncTCP@1.2.0
     ESPAsyncUDP@697c75a025
     AsyncTCP@1.0.3
-    Esp Async WebServer@1.2.0
+    https://github.com/Aircoookie/ESPAsyncWebServer
     IRremoteESP8266@2.7.3
   #For use of the TTGO T-Display ESP32 Module with integrated TFT display uncomment the following line  
     #TFT_eSPI
diff --git a/wled00/FX.cpp b/wled00/FX.cpp
index 35ea3f80..c74c113b 100644
--- a/wled00/FX.cpp
+++ b/wled00/FX.cpp
@@ -1599,7 +1599,7 @@ uint16_t WS2812FX::mode_oscillate(void)
 uint16_t WS2812FX::mode_lightning(void)
 {
   uint16_t ledstart = random16(SEGLEN);               // Determine starting location of flash
-  uint16_t ledlen = random16(SEGLEN -1 -ledstart);    // Determine length of flash (not to go beyond NUM_LEDS-1)
+  uint16_t ledlen = 1 + random16(SEGLEN -ledstart);    // Determine length of flash (not to go beyond NUM_LEDS-1)
   uint8_t bri = 255/random8(1, 3);
 
   if (SEGENV.step == 0)
@@ -2247,7 +2247,7 @@ uint16_t WS2812FX::mode_ripple_rainbow(void) {
 CRGB WS2812FX::twinklefox_one_twinkle(uint32_t ms, uint8_t salt, bool cat)
 {
   // Overall twinkle speed (changed)
-  uint16_t ticks = ms / (32 - (SEGMENT.speed >> 3));
+  uint16_t ticks = ms / SEGENV.aux0;
   uint8_t fastcycle8 = ticks;
   uint16_t slowcycle16 = (ticks >> 8) + salt;
   slowcycle16 += sin8(slowcycle16);
@@ -2312,10 +2312,11 @@ uint16_t WS2812FX::twinklefox_base(bool cat)
   // numbers that it generates is (paradoxically) stable.
   uint16_t PRNG16 = 11337;
 
+  // Calculate speed
+  if (SEGMENT.speed > 100) SEGENV.aux0 = 3 + ((255 - SEGMENT.speed) >> 3);
+  else SEGENV.aux0 = 22 + ((100 - SEGMENT.speed) >> 1);
+
   // Set up the background color, "bg".
-  // if AUTO_SELECT_BACKGROUND_COLOR == 1, and the first two colors of
-  // the current palette are identical, then a deeply faded version of
-  // that color is used for the background color
   CRGB bg;
   bg = col_to_crgb(SEGCOLOR(1));
   uint8_t bglight = bg.getAverageLight();
diff --git a/wled00/fcn_declare.h b/wled00/fcn_declare.h
index da8643d4..0982fd62 100644
--- a/wled00/fcn_declare.h
+++ b/wled00/fcn_declare.h
@@ -87,7 +87,7 @@ void serializeSegment(JsonObject& root, WS2812FX::Segment& seg, byte id);
 void serializeState(JsonObject root);
 void serializeInfo(JsonObject root);
 void serveJson(AsyncWebServerRequest* request);
-void serveLiveLeds(AsyncWebServerRequest* request);
+bool serveLiveLeds(AsyncWebServerRequest* request, uint32_t wsClient = 0);
 
 //led.cpp
 void setValuesFromMainSeg();
@@ -210,6 +210,11 @@ String settingsProcessor(const String& var);
 String dmxProcessor(const String& var);
 void serveSettings(AsyncWebServerRequest* request);
 
+//ws.cpp
+void handleWs();
+void wsEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len);
+void sendDataWs(AsyncWebSocketClient * client = nullptr);
+
 //xml.cpp
 void XML_response(AsyncWebServerRequest *request, char* dest = nullptr);
 void URL_response(AsyncWebServerRequest *request);
diff --git a/wled00/json.cpp b/wled00/json.cpp
index ebd7da91..0a64f192 100644
--- a/wled00/json.cpp
+++ b/wled00/json.cpp
@@ -333,6 +333,12 @@ void serializeInfo(JsonObject root)
     root["lip"] = realtimeIP.toString();
   }
 
+  #ifdef WLED_ENABLE_WEBSOCKETS
+  root["ws"] = ws.count();
+  #else
+  root["ws"] = -1;
+  #endif
+
   root["fxcount"] = strip.getModeCount();
   root["palcount"] = strip.getPaletteCount();
 
@@ -454,21 +460,37 @@ void serveJson(AsyncWebServerRequest* request)
 
 #define MAX_LIVE_LEDS 180
 
-void serveLiveLeds(AsyncWebServerRequest* request)
+bool serveLiveLeds(AsyncWebServerRequest* request, uint32_t wsClient)
 {
+  AsyncWebSocketClient * wsc;
+  if (!request) { //not HTTP, use Websockets
+    #ifdef WLED_ENABLE_WEBSOCKETS
+    wsc = ws.client(wsClient);
+    if (!wsc || wsc->queueLength() > 0) return false; //only send if queue free
+    #endif
+  }
+
   uint16_t used = ledCount;
   uint16_t n = (used -1) /MAX_LIVE_LEDS +1; //only serve every n'th LED if count over MAX_LIVE_LEDS
   char buffer[2000] = "{\"leds\":[";
-  olen = 9;
   obuf = buffer;
+  olen = 9;
 
   for (uint16_t i= 0; i < used; i += n)
   {
-    olen += sprintf(buffer + olen, "\"%06X\",", strip.getPixelColor(i));
+    olen += sprintf(obuf + olen, "\"%06X\",", strip.getPixelColor(i));
   }
   olen -= 1;
   oappend("],\"n\":");
   oappendi(n);
   oappend("}");
-  request->send(200, "application/json", buffer);
+  if (request) {
+    request->send(200, "application/json", buffer);
+  }
+  #ifdef WLED_ENABLE_WEBSOCKETS
+  else {
+    wsc->text(obuf, olen);
+  }
+  #endif
+  return true;
 }
diff --git a/wled00/led.cpp b/wled00/led.cpp
index 2fd23526..29baae8a 100644
--- a/wled00/led.cpp
+++ b/wled00/led.cpp
@@ -3,7 +3,6 @@
 /*
  * LED methods
  */
-
 void setValuesFromMainSeg()
 {
   WS2812FX::Segment& seg = strip.getSegment(strip.getMainSegmentId());
@@ -167,6 +166,7 @@ void colorUpdated(int callMode)
 
 void updateInterfaces(uint8_t callMode)
 {
+  sendDataWs();
   #ifndef WLED_DISABLE_ALEXA
   if (espalexaDevice != nullptr && callMode != NOTIFIER_CALL_MODE_ALEXA) {
     espalexaDevice->setValue(bri);
diff --git a/wled00/wled.cpp b/wled00/wled.cpp
index 484130af..594c9225 100644
--- a/wled00/wled.cpp
+++ b/wled00/wled.cpp
@@ -14,8 +14,11 @@ WLED::WLED()
 void WLED::reset()
 {
   briT = 0;
+  #ifdef WLED_ENABLE_WEBSOCKETS
+  ws.closeAll(1012);
+  #endif
   long dly = millis();
-  while (millis() - dly < 250) {
+  while (millis() - dly < 450) {
     yield();        // enough time to send response to client
   }
   setAllLeds();
@@ -94,7 +97,8 @@ void WLED::loop()
     if (lastMqttReconnectAttempt > millis()) rolloverMillis++; //millis() rolls over every 50 days
     initMqtt();
   }
-
+  yield();
+  handleWs();
 
 // DEBUG serial logging
 #ifdef WLED_DEBUG
@@ -283,6 +287,10 @@ void WLED::initAP(bool resetAP)
 
 void WLED::initConnection()
 {
+  #ifdef WLED_ENABLE_WEBSOCKETS
+  ws.onEvent(wsEvent);
+  #endif
+
   WiFi.disconnect(true);        // close old connections
 #ifdef ESP8266
   WiFi.setPhyMode(WIFI_PHY_MODE_11N);
diff --git a/wled00/wled.h b/wled00/wled.h
index 5c34955d..fda93b52 100644
--- a/wled00/wled.h
+++ b/wled00/wled.h
@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2006251
+#define VERSION 2007020
 
 // ESP8266-01 (blue) got too little storage space to work with all features of WLED. To use it, you must use ESP8266 Arduino Core v2.4.2 and the setting 512K(No SPIFFS).
 
@@ -30,6 +30,7 @@
 #endif
 #define WLED_ENABLE_ADALIGHT       // saves 500b only
 //#define WLED_ENABLE_DMX          // uses 3.5kb (use LEDPIN other than 2)
+//#define WLED_ENABLE_WEBSOCKETS
 
 #define WLED_DISABLE_FILESYSTEM        // SPIFFS is not used by any WLED feature yet
 //#define WLED_ENABLE_FS_SERVING   // Enable sending html file from SPIFFS before serving progmem version
@@ -480,6 +481,9 @@ WLED_GLOBAL bool doPublishMqtt _INIT(false);
 
 // server library objects
 WLED_GLOBAL AsyncWebServer server _INIT_N(((80)));
+#ifdef WLED_ENABLE_WEBSOCKETS
+WLED_GLOBAL AsyncWebSocket ws _INIT_N((("/ws")));
+#endif
 WLED_GLOBAL AsyncClient* hueClient _INIT(NULL);
 WLED_GLOBAL AsyncMqttClient* mqtt _INIT(NULL);
 
diff --git a/wled00/wled_server.cpp b/wled00/wled_server.cpp
index cd623bc4..6c981afb 100644
--- a/wled00/wled_server.cpp
+++ b/wled00/wled_server.cpp
@@ -205,10 +205,10 @@ void initServer()
   } else
   {
     server.on("/edit", HTTP_GET, [](AsyncWebServerRequest *request){
-      serveMessage(request, 500, "Access Denied", "Please unlock OTA in security settings!", 254);
+      serveMessage(request, 500, "Access Denied", F("Please unlock OTA in security settings!"), 254);
     });
     server.on("/update", HTTP_GET, [](AsyncWebServerRequest *request){
-      serveMessage(request, 500, "Access Denied", "Please unlock OTA in security settings!", 254);
+      serveMessage(request, 500, "Access Denied", F("Please unlock OTA in security settings!"), 254);
     });
   }
 
@@ -226,6 +226,10 @@ void initServer()
     if (captivePortal(request)) return;
     serveIndexOrWelcome(request);
   });
+
+  #ifdef WLED_ENABLE_WEBSOCKETS
+  server.addHandler(&ws);
+  #endif
   
   //called when the url is not defined here, ajax-in; get-settings
   server.onNotFound([](AsyncWebServerRequest *request){
@@ -374,7 +378,7 @@ void serveSettings(AsyncWebServerRequest* request)
 
   if (subPage == 1 && wifiLock && otaLock)
   {
-    serveMessage(request, 500, "Access Denied", "Please unlock OTA in security settings!", 254); return;
+    serveMessage(request, 500, "Access Denied", F("Please unlock OTA in security settings!"), 254); return;
   }
   
   #ifdef WLED_DISABLE_MOBILE_UI //disable welcome page if not enough storage
diff --git a/wled00/ws.cpp b/wled00/ws.cpp
new file mode 100644
index 00000000..affe0439
--- /dev/null
+++ b/wled00/ws.cpp
@@ -0,0 +1,114 @@
+#include "wled.h"
+
+/*
+ * WebSockets server for bidirectional communication
+ */
+#ifdef WLED_ENABLE_WEBSOCKETS
+
+uint16_t wsLiveClientId = 0;
+unsigned long wsLastLiveTime = 0;
+//uint8_t* wsFrameBuffer = nullptr;
+
+#define WS_LIVE_INTERVAL 40
+
+void wsEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len)
+{
+  if(type == WS_EVT_CONNECT){
+    //client connected
+    sendDataWs(client);
+    //client->ping();
+  } else if(type == WS_EVT_DISCONNECT){
+    //client disconnected
+    if (client->id() == wsLiveClientId) wsLiveClientId = 0;
+  } else if(type == WS_EVT_DATA){
+    //data packet
+    AwsFrameInfo * info = (AwsFrameInfo*)arg;
+    if(info->final && info->index == 0 && info->len == len){
+      //the whole message is in a single frame and we got all of it's data (max. 1450byte)
+      if(info->opcode == WS_TEXT)
+      {
+        bool verboseResponse = false;
+        { //scope JsonDocument so it releases its buffer
+          DynamicJsonDocument jsonBuffer(8192);
+          DeserializationError error = deserializeJson(jsonBuffer, data, len);
+          JsonObject root = jsonBuffer.as<JsonObject>();
+          if (error || root.isNull()) return;
+
+          if (root.containsKey("lv"))
+          {
+            wsLiveClientId = root["lv"] ? client->id() : 0;
+          }
+
+          verboseResponse = deserializeState(root);
+        }
+        if (verboseResponse || millis() - lastInterfaceUpdate < 1900) sendDataWs(client); //update if it takes longer than 100ms until next "broadcast"
+      }
+    } else {
+      //message is comprised of multiple frames or the frame is split into multiple packets
+      //if(info->index == 0){
+        //if (!wsFrameBuffer && len < 4096) wsFrameBuffer = new uint8_t[4096];
+      //}
+
+      //if (wsFrameBuffer && len < 4096 && info->index + info->)
+      //{
+
+      //}
+
+      if((info->index + len) == info->len){
+        if(info->final){
+          if(info->message_opcode == WS_TEXT) {
+            client->text("{\"error\":10}"); //we do not handle split packets right now
+          }
+        }
+      }
+    }
+  } else if(type == WS_EVT_ERROR){
+    //error was received from the other end
+
+  } else if(type == WS_EVT_PONG){
+    //pong message was received (in response to a ping request maybe)
+
+  }
+}
+
+void sendDataWs(AsyncWebSocketClient * client)
+{
+  if (!ws.count()) return;
+  AsyncWebSocketMessageBuffer * buffer;
+
+  { //scope JsonDocument so it releases its buffer
+    DynamicJsonDocument doc(8192);
+    JsonObject state = doc.createNestedObject("state");
+    serializeState(state);
+    JsonObject info  = doc.createNestedObject("info");
+    serializeInfo(info);
+    size_t len = measureJson(doc);
+    buffer = ws.makeBuffer(len);
+    if (!buffer) return; //out of memory
+
+    serializeJson(doc, (char *)buffer->get(), len +1);
+  } 
+  if (client) {
+    client->text(buffer);
+  } else {
+    ws.textAll(buffer);
+  }
+}
+
+void handleWs()
+{
+  if (millis() - wsLastLiveTime > WS_LIVE_INTERVAL)
+  {
+    ws.cleanupClients();
+    bool success = true;
+    if (wsLiveClientId)
+      success = serveLiveLeds(nullptr, wsLiveClientId);
+    wsLastLiveTime = millis();
+    if (!success) wsLastLiveTime -= 20; //try again in 20ms if failed due to non-empty WS queue
+  }
+}
+
+#else
+void handleWs() {}
+void sendDataWs(AsyncWebSocketClient * client) {}
+#endif
\ No newline at end of file