diff --git a/.github/workflows/compile_development.yml b/.github/workflows/compile_development.yml
index ffde2d21..4913d726 100644
--- a/.github/workflows/compile_development.yml
+++ b/.github/workflows/compile_development.yml
@@ -49,6 +49,9 @@ jobs:
     - name: Run PlatformIO
       run: pio run -d src --environment esp8266-release --environment esp8266-release-prometheus --environment esp8285-release --environment esp32-wroom32-release --environment esp32-wroom32-release-prometheus --environment opendtufusionv1-release
 
+    - name: Copy boot_app0.bin
+      run: cp ~/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin src/.pio/build/opendtufusionv1-release/ota.bin
+
     - name: Rename Binary files
       id: rename-binary-files
       working-directory: src
diff --git a/.github/workflows/compile_release.yml b/.github/workflows/compile_release.yml
index 84ad5111..a50ec355 100644
--- a/.github/workflows/compile_release.yml
+++ b/.github/workflows/compile_release.yml
@@ -53,6 +53,9 @@ jobs:
     - name: Run PlatformIO
       run: pio run -d src --environment esp8266-release --environment esp8266-release-prometheus --environment esp8285-release --environment esp32-wroom32-release --environment esp32-wroom32-release-prometheus --environment opendtufusionv1-release
 
+    - name: Copy boot_app0.bin
+      run: cp ~/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin src/.pio/build/opendtufusionv1-release/ota.bin
+
     - name: Rename Binary files
       id: rename-binary-files
       working-directory: src
diff --git a/ahoy.code-workspace b/ahoy.code-workspace
new file mode 100644
index 00000000..20d5909e
--- /dev/null
+++ b/ahoy.code-workspace
@@ -0,0 +1,45 @@
+{
+	"folders": [
+		{
+			"path": "."
+		},
+		{
+			"path": "src"
+		}
+	],
+	"settings": {
+		"files.associations": {
+			"algorithm": "cpp",
+			"array": "cpp",
+			"chrono": "cpp",
+			"deque": "cpp",
+			"format": "cpp",
+			"forward_list": "cpp",
+			"functional": "cpp",
+			"initializer_list": "cpp",
+			"iterator": "cpp",
+			"list": "cpp",
+			"memory": "cpp",
+			"queue": "cpp",
+			"random": "cpp",
+			"regex": "cpp",
+			"vector": "cpp",
+			"xhash": "cpp",
+			"xlocmon": "cpp",
+			"xlocnum": "cpp",
+			"xmemory": "cpp",
+			"xstring": "cpp",
+			"xtree": "cpp",
+			"xutility": "cpp",
+			"*.tcc": "cpp",
+			"string": "cpp",
+			"unordered_map": "cpp",
+			"unordered_set": "cpp",
+			"string_view": "cpp",
+			"sstream": "cpp",
+			"istream": "cpp",
+			"ostream": "cpp"
+		},
+		"editor.formatOnSave": false
+	}
+}
\ No newline at end of file
diff --git a/scripts/getVersion.py b/scripts/getVersion.py
index 0ebe1ec2..e8393ae1 100644
--- a/scripts/getVersion.py
+++ b/scripts/getVersion.py
@@ -50,6 +50,7 @@ def readVersion(path, infile):
                     versionnumber += line[p+13:].rstrip() + "."
     
     os.mkdir(path + "firmware/")
+    os.mkdir(path + "firmware/s3/")
     sha = os.getenv("SHA",default="sha")
 
     versionout = version[:-1] + "_" + sha + "_esp8266.bin"
@@ -80,7 +81,7 @@ def readVersion(path, infile):
 
     versionout = version[:-1] + "_" + sha + "_esp32s3.bin"
     src = path + ".pio/build/opendtufusionv1-release/firmware.bin"
-    dst = path + "firmware/" + versionout
+    dst = path + "firmware/s3/" + versionout
     os.rename(src, dst)
 
     # other ESP32 bin files
@@ -89,6 +90,14 @@ def readVersion(path, infile):
     os.rename(src + "bootloader.bin", dst + "bootloader.bin")
     os.rename(src + "partitions.bin", dst + "partitions.bin")
     genOtaBin(path + "firmware/")
+
+    # other ESP32S3 bin files
+    src = path + ".pio/build/opendtufusionv1-release/"
+    dst = path + "firmware/s3/"
+    os.rename(src + "bootloader.bin", dst + "bootloader.bin")
+    os.rename(src + "partitions.bin", dst + "partitions.bin")
+    os.rename(src + "ota.bin", dst + "ota.bin")
+
     os.rename("../scripts/gh-action-dev-build-flash.html", path + "install.html")
 
     print("name=" + versionnumber[:-1] )
diff --git a/src/app.cpp b/src/app.cpp
index d3fba12a..9ec6ff26 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -387,30 +387,40 @@ void app::mqttSubRxCb(JsonObject obj) {
 
 //-----------------------------------------------------------------------------
 void app::setupLed(void) {
-    /** LED connection diagram
-     *          \\
-     * PIN ---- |<----- 3.3V
-     *
-     * */
+
+    uint8_t led_off = (mConfig->led.led_high_active != 0) ? LOW : HIGH;
+
     if (mConfig->led.led0 != 0xff) {
         pinMode(mConfig->led.led0, OUTPUT);
-        digitalWrite(mConfig->led.led0, HIGH);  // LED off
+        digitalWrite(mConfig->led.led0, led_off);
     }
     if (mConfig->led.led1 != 0xff) {
         pinMode(mConfig->led.led1, OUTPUT);
-        digitalWrite(mConfig->led.led1, HIGH);  // LED off
+        digitalWrite(mConfig->led.led1, led_off);
     }
 }
 
 //-----------------------------------------------------------------------------
 void app::updateLed(void) {
+
+    uint8_t led_off = (mConfig->led.led_high_active != 0) ? LOW : HIGH;
+    uint8_t led_on = (mConfig->led.led_high_active != 0) ? HIGH : LOW;
+
     if (mConfig->led.led0 != 0xff) {
         Inverter<> *iv = mSys.getInverterByPos(0);
         if (NULL != iv) {
             if (iv->isProducing(mTimestamp))
-                digitalWrite(mConfig->led.led0, LOW);  // LED on
+                digitalWrite(mConfig->led.led0, led_on);
             else
-                digitalWrite(mConfig->led.led0, HIGH);  // LED off
+                digitalWrite(mConfig->led.led0, led_off);
+        }
+    }
+
+    if (mConfig->led.led1 != 0xff) {
+        if (getMqttIsConnected()) {
+            digitalWrite(mConfig->led.led1, led_on);
+        } else {
+            digitalWrite(mConfig->led.led1, led_off);
         }
     }
 }
diff --git a/src/app.h b/src/app.h
index cbf7e6a1..6dfc404c 100644
--- a/src/app.h
+++ b/src/app.h
@@ -213,8 +213,8 @@ class app : public IApp, public ah::Scheduler {
 
         void mqttSubRxCb(JsonObject obj);
 
-        void setupLed(void);
-        void updateLed(void);
+        void setupLed();
+        void updateLed();
 
         void tickReboot(void) {
             DPRINTLN(DBG_INFO, F("Rebooting..."));
diff --git a/src/config/settings.h b/src/config/settings.h
index 6d58b406..e895a8a9 100644
--- a/src/config/settings.h
+++ b/src/config/settings.h
@@ -100,6 +100,7 @@ typedef struct {
 typedef struct {
     uint8_t led0;  // first LED pin
     uint8_t led1;  // second LED pin
+    uint8_t led_high_active;  // determines if LEDs are high or low active
 } cfgLed_t;
 
 typedef struct {
@@ -378,6 +379,7 @@ class settings {
 
             mCfg.led.led0 = DEF_PIN_OFF;
             mCfg.led.led1 = DEF_PIN_OFF;
+            mCfg.led.led_high_active = LOW;
 
             memset(&mCfg.inst, 0, sizeof(cfgInst_t));
 
@@ -517,9 +519,11 @@ class settings {
             if(set) {
                 obj[F("0")] = mCfg.led.led0;
                 obj[F("1")] = mCfg.led.led1;
+                obj[F("led_high_active")] = mCfg.led.led_high_active;
             } else {
                 mCfg.led.led0 = obj[F("0")];
                 mCfg.led.led1 = obj[F("1")];
+                mCfg.led.led_high_active = obj[F("led_high_active")];
             }
         }
 
diff --git a/src/platformio.ini b/src/platformio.ini
index cae35934..5d4c655d 100644
--- a/src/platformio.ini
+++ b/src/platformio.ini
@@ -138,6 +138,10 @@ monitor_filters =
 [env:opendtufusionv1-release]
 platform = espressif32
 board = esp32-s3-devkitc-1
+upload_protocol = esp-builtin
+upload_speed = 115200
+debug_tool = esp-builtin
+debug_speed = 12000
 build_flags = -D RELEASE -std=gnu++14
 build_unflags = -std=gnu++11
 monitor_filters =
diff --git a/src/web/RestApi.h b/src/web/RestApi.h
index b224f239..8c193e28 100644
--- a/src/web/RestApi.h
+++ b/src/web/RestApi.h
@@ -391,6 +391,7 @@ class RestApi {
             obj[F("miso")] = mConfig->nrf.pinMiso;
             obj[F("led0")] = mConfig->led.led0;
             obj[F("led1")] = mConfig->led.led1;
+            obj[F("led_high_active")] = mConfig->led.led_high_active;
         }
 
         void getRadio(JsonObject obj) {
diff --git a/src/web/html/setup.html b/src/web/html/setup.html
index bfbda402..97bf5608 100644
--- a/src/web/html/setup.html
+++ b/src/web/html/setup.html
@@ -411,6 +411,10 @@
                 [47, "GPIO47"],
                 [48, "GPIO48"],
             ];
+            var led_high_active = [
+                [0, "low active"],
+                [1, "high active"],
+            ];
 
             const re = /11[2,4,6]1.*/;
 
@@ -670,6 +674,14 @@
                         ])
                     );
                 }
+                e.append(
+                    ml("div", { class: "row mb-3" }, [
+                        ml("div", { class: "col-12 col-sm-3 my-2" }, "LED polarity"),
+                        ml("div", { class: "col-12 col-sm-9" },
+                            sel('pinLedHighActive', led_high_active, obj['led_high_active'])
+                        )
+                    ])
+                );
             }
 
             function parseRadio(obj) {
diff --git a/src/web/web.h b/src/web/web.h
index 47bdeb1d..4d322fac 100644
--- a/src/web/web.h
+++ b/src/web/web.h
@@ -34,7 +34,7 @@
 
 #define WEB_SERIAL_BUF_SIZE 2048
 
-const char *const pinArgNames[] = {"pinCs", "pinCe", "pinIrq", "pinSclk", "pinMosi", "pinMiso", "pinLed0", "pinLed1"};
+const char *const pinArgNames[] = {"pinCs", "pinCe", "pinIrq", "pinSclk", "pinMosi", "pinMiso", "pinLed0", "pinLed1", "pinLedHighActive"};
 
 template <class HMSYSTEM>
 class Web {
@@ -532,6 +532,7 @@ class Web {
                     case 5:  mConfig->nrf.pinMiso  = ((pin != 0xff) ? pin : DEF_MISO_PIN); break;
                     case 6:  mConfig->led.led0 = pin; break;
                     case 7:  mConfig->led.led1 = pin; break;
+                    case 8:  mConfig->led.led_high_active = pin; break;  // this is not really a pin but a polarity, but handling it close to here makes sense
                 }
             }