diff --git a/platformio.ini b/platformio.ini
index 46169b9e..6b7a3d01 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -106,6 +106,7 @@ build_flags =
   -DBEARSSL_SSL_BASIC
   -D CORE_DEBUG_LEVEL=0
   -D NDEBUG
+  -Wno-attributes ;; silence warnings about unknown attribute 'maybe_unused' in NeopixelBus
   #build_flags for the IRremoteESP8266 library (enabled decoders have to appear here)
   -D _IR_ENABLE_DEFAULT_=false
   -D DECODE_HASH=true
@@ -123,6 +124,7 @@ build_unflags =
 
 build_flags_esp8266 = ${common.build_flags}  ${esp8266.build_flags}
 build_flags_esp32   = ${common.build_flags}  ${esp32.build_flags}
+build_flags_esp32_V4= ${common.build_flags}  ${esp32_idf_V4.build_flags}
 
 ldscript_1m128k = eagle.flash.1m128.ld
 ldscript_2m512k = eagle.flash.2m512.ld
@@ -256,10 +258,11 @@ build_flags = -g
   -DARDUINO_ARCH_ESP32S2
   -DCONFIG_IDF_TARGET_ESP32S2=1
   -D CONFIG_ASYNC_TCP_USE_WDT=0
+  -DARDUINO_USB_MSC_ON_BOOT=0 -DARDUINO_USB_DFU_ON_BOOT=0
   -DCO
   -DARDUINO_USB_MODE=0 ;; this flag is mandatory for ESP32-S2 !
   ;; please make sure that the following flags are properly set (to 0 or 1) by your board.json, or included in your custom platformio_override.ini entry:
-  ;; ARDUINO_USB_CDC_ON_BOOT, ARDUINO_USB_MSC_ON_BOOT, ARDUINO_USB_DFU_ON_BOOT
+  ;; ARDUINO_USB_CDC_ON_BOOT
 
 lib_deps =
   ${env.lib_deps}
@@ -295,9 +298,10 @@ build_flags = -g
   -DARDUINO_ARCH_ESP32S3
   -DCONFIG_IDF_TARGET_ESP32S3=1
   -D CONFIG_ASYNC_TCP_USE_WDT=0
+  -DARDUINO_USB_MSC_ON_BOOT=0 -DARDUINO_DFU_ON_BOOT=0
   -DCO
   ;; please make sure that the following flags are properly set (to 0 or 1) by your board.json, or included in your custom platformio_override.ini entry:
-  ;; ARDUINO_USB_MODE, ARDUINO_USB_CDC_ON_BOOT, ARDUINO_USB_MSC_ON_BOOT, ARDUINO_USB_DFU_ON_BOOT
+  ;; ARDUINO_USB_MODE, ARDUINO_USB_CDC_ON_BOOT
 
 lib_deps =
   ${env.lib_deps}
@@ -433,7 +437,7 @@ board_build.flash_mode = qio
 upload_speed = 460800
 build_unflags = ${common.build_unflags}
 build_flags = ${common.build_flags} ${esp32s2.build_flags} #-D WLED_RELEASE_NAME=S2_saola
-  -DARDUINO_USB_CDC_ON_BOOT=1 -DARDUINO_USB_MSC_ON_BOOT=0 -DARDUINO_USB_DFU_ON_BOOT=0
+  -DARDUINO_USB_CDC_ON_BOOT=1
 lib_deps = ${esp32s2.lib_deps}
 
 [env:esp32c3dev]
@@ -460,8 +464,8 @@ upload_speed = 921600 ; or  460800
 build_unflags = ${common.build_unflags}
 build_flags =  ${common.build_flags} ${esp32s3.build_flags} 
   -D CONFIG_LITTLEFS_FOR_IDF_3_2 -D WLED_WATCHDOG_TIMEOUT=0
-  -D ARDUINO_USB_CDC_ON_BOOT=0 -D ARDUINO_USB_MSC_ON_BOOT=0 -D ARDUINO_DFU_ON_BOOT=0 ; -D ARDUINO_USB_MODE=1 ;; for boards with serial-to-USB chip
-  ;-D ARDUINO_USB_CDC_ON_BOOT=1 -D ARDUINO_USB_MSC_ON_BOOT=0 -D ARDUINO_DFU_ON_BOOT=0 ; -D ARDUINO_USB_MODE=0 ;; for boards with USB-OTG connector only (USBCDC or "TinyUSB")
+  -D ARDUINO_USB_CDC_ON_BOOT=0  ;; -D ARDUINO_USB_MODE=1 ;; for boards with serial-to-USB chip
+  ;-D ARDUINO_USB_CDC_ON_BOOT=1 ;; -D ARDUINO_USB_MODE=0 ;; for boards with USB-OTG connector only (USBCDC or "TinyUSB")
   ;-D WLED_DEBUG
 lib_deps = ${esp32s3.lib_deps}
 board_build.partitions = tools/WLED_ESP32_8MB.csv
@@ -481,8 +485,8 @@ upload_speed = 921600
 build_unflags = ${common.build_unflags}
 build_flags =  ${common.build_flags} ${esp32s3.build_flags} 
   -D CONFIG_LITTLEFS_FOR_IDF_3_2 -D WLED_WATCHDOG_TIMEOUT=0
-  ;-D ARDUINO_USB_CDC_ON_BOOT=0 -D ARDUINO_USB_MSC_ON_BOOT=0 -D ARDUINO_DFU_ON_BOOT=0 ; -D ARDUINO_USB_MODE=1 ;; for boards with serial-to-USB chip
-  -D ARDUINO_USB_CDC_ON_BOOT=1 -D ARDUINO_USB_MSC_ON_BOOT=0 -D ARDUINO_DFU_ON_BOOT=0 ; -D ARDUINO_USB_MODE=0 ;; for boards with USB-OTG connector only (USBCDC or "TinyUSB")
+  ;-D ARDUINO_USB_CDC_ON_BOOT=0 ;; -D ARDUINO_USB_MODE=1 ;; for boards with serial-to-USB chip
+  -D ARDUINO_USB_CDC_ON_BOOT=1  ;; -D ARDUINO_USB_MODE=0 ;; for boards with USB-OTG connector only (USBCDC or "TinyUSB")
   ; -D WLED_RELEASE_NAME=ESP32-S3_PSRAM
   -D WLED_USE_PSRAM -DBOARD_HAS_PSRAM ; tells WLED that PSRAM shall be used
 lib_deps = ${esp32s3.lib_deps}
@@ -562,8 +566,6 @@ build_unflags = ${common.build_unflags} -DARDUINO_USB_CDC_ON_BOOT=1
 build_flags = ${common.build_flags} ${esp32s2.build_flags} #-D WLED_RELEASE_NAME=LolinS2
   -DBOARD_HAS_PSRAM
   -DARDUINO_USB_CDC_ON_BOOT=0
-  -DARDUINO_USB_MSC_ON_BOOT=0
-  -DARDUINO_USB_DFU_ON_BOOT=0
   -D WLED_USE_PSRAM
   -D WLED_WATCHDOG_TIMEOUT=0
   -D CONFIG_ASYNC_TCP_USE_WDT=0