diff --git a/platformio.ini b/platformio.ini
index 742b8f0d..cb24513a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -72,6 +72,7 @@ default_envs =
   esp32_pico_4MB_M
   esp32_4MB_PSRAM_S
   ; esp32_4MB_PSRAM_REV3_S ;; experimental, optimized for WROVER-E with "revision3" chip
+  esp32S3_4MB_S
   esp32S3_8MB_S            ;; experimental, optimized for speed
   esp32S3_8MB_M
   esp32S3_4MB_PSRAM_S      ;; for lolin s3 mini, S3 zero, S3 super mini - optimized for speed
@@ -1852,6 +1853,37 @@ lib_deps = ${esp32_4MB_V4_M_base.esp32_lib_deps}
 # ------------------------------------------------------------------------------
 # esp32-S3 environments
 # ------------------------------------------------------------------------------
+[env:esp32S3_4MB_S]
+extends = esp32_4MB_V4_M_base
+board = esp32-s3-devkitc-1
+build_unflags = 
+  -D USERMOD_DALLASTEMPERATURE ;; disabled because it hangs during usermod setup on -S3 (autodetect broken?)
+  -D USE_ALT_DISPLAY ;; four line display seems to have problems with I2C - it hangs during usermod setup
+  -D USERMOD_FOUR_LINE_DISPLAY ;; see above
+  -D USERMOD_ROTARY_ENCODER_UI ;; see above
+  -D WLED_ENABLE_DMX ;; disabled because it does not work with ESP-IDF 4.4.x (buggy driver in SparkFunDMX)
+
+build_flags = ${common.build_flags} ${esp32s3.build_flags} -Wno-misleading-indentation -Wno-format-truncation
+  ${common_mm.build_flags_S} 
+  ${common_mm.HUB75_build_flags}
+  ; -DBOARD_HAS_PSRAM -D WLED_USE_PSRAM_JSON -D WLED_USE_PSRAM ;; un-comment in case your board supports PSRAM
+  -D WLED_RELEASE_NAME=esp32S3_4MB_S 
+  -DARDUINO_USB_MODE=1 -DARDUINO_USB_CDC_ON_BOOT=0 -DARDUINO_USB_MSC_ON_BOOT=0 -DARDUINO_USB_DFU_ON_BOOT=0   ;; for Serial-to-USB chip
+  ;;-DARDUINO_USB_MODE=1 -DARDUINO_USB_CDC_ON_BOOT=1 -DARDUINO_USB_MSC_ON_BOOT=0 -DARDUINO_USB_DFU_ON_BOOT=1 ;; for Hardware-CDC USB mode
+  ;;-D WLED_DISABLE_ADALIGHT     ;; disables serial protocols - recommended for Hardware-CDC USB (Serial RX will receive junk commands when RX pin is unconnected, unless its pulled down by resistor)
+  -D WLED_WATCHDOG_TIMEOUT=0 -D CONFIG_ASYNC_TCP_USE_WDT=0
+  ; -D U8X8_HAVE_2ND_HW_I2C ;; experimental - tells U8g2 lib that a second HW I2C unit exists
+  -D WLED_DISABLE_LOXONE ; FLASH 1272 bytes
+  -D WLED_DISABLE_ALEXA ;  RAM 116 bytes; FLASH 13524 bytes
+  ; -D WLED_DISABLE_MQTT ;   RAM 216 bytes; FLASH 16496 bytes
+  ; -D WLED_DISABLE_HUESYNC ;RAM 122 bytes; FLASH 6308 bytes
+  ; -D WLED_DISABLE_INFRARED ;RAM 136 bytes; FLASH 24492 bytes
+  ;;-D WLEDMM_FASTPATH ; WLEDMM experimental option. Reduces audio lag (latency), and allows for faster LED framerates. May break compatibility with previous versions.
+  ; -D WLED_DEBUG
+  ; -D SR_DEBUG
+  ; -D MIC_LOGGER
+lib_deps = ${esp32s3.lib_deps} ${common_mm.lib_deps_S}
+    ${common_mm.HUB75_lib_deps}
 
 
 [env:esp32S3_8MB_M]