platformio.ini: update esp32mdevums

- use https://github.com/softhack007/LITTLEFS-threadsafe.git#master
- refactor esp32mdevums: add comments (to be augmented as still questions)

platformio.ini

@@ -225,7 +225,9 @@ default_partitions = tools/WLED_ESP32_4MB_1MB_FS.csv
 
 lib_deps =
   ${env.lib_deps}
-  https://github.com/lorol/LITTLEFS.git
+  ; https://github.com/lorol/LITTLEFS.git
+  ; WLEDSR specific: use patched version of lorol LittleFS
+  https://github.com/softhack007/LITTLEFS-threadsafe.git#master
   makuna/NeoPixelBus @ 2.6.9
   https://github.com/pbolduc/AsyncTCP.git @ 1.2.0
 
@@ -450,13 +452,14 @@ platform = ${esp32.platform}
 upload_speed = 460800 ; or 921600
 platform_packages = ${esp32.platform_packages}
 build_unflags = ${common.build_unflags}
+
 build_flags = ${common.build_flags_esp32}
   -D WLED_RELEASE_NAME=ESP32 #-D WLED_DISABLE_BLYNK #-D WLED_DISABLE_BROWNOUT_DET
   -D ABL_MILLIAMPS_DEFAULT=1500 ; 850 not enough for 1024 leds
   -D UWLED_USE_MY_CONFIG
-  -D USERMOD_CUSTOMEFFECTS
   -D USERMOD_AUDIOREACTIVE
   -D UM_AUDIOREACTIVE_USE_NEW_FFT
+  -D USERMOD_CUSTOMEFFECTS
   ; -D WLED_DEBUG
 lib_deps = ${esp32.lib_deps}
   https://github.com/kosme/arduinoFFT#develop @ 1.9.2
@@ -472,30 +475,32 @@ upload_speed = 460800 ; or 921600
 platform_packages = ${esp32.platform_packages}
 build_unflags = ${common.build_unflags}
 build_flags = ${common.build_flags_esp32}
-  -D WLED_RELEASE_NAME=ESP32 #-D WLED_DISABLE_BLYNK #-D WLED_DISABLE_BROWNOUT_DET
+  -D WLED_RELEASE_NAME=ESP32 ; what does this do?
+  #-D WLED_DISABLE_BLYNK #-D WLED_DISABLE_BROWNOUT_DET ; which settings and when?
   -D ABL_MILLIAMPS_DEFAULT=1500 ; 850 not enough for 1024 leds
-  -D WLED_MAX_USERMODS=8
-  -D UWLED_USE_MY_CONFIG
-  -D USERMOD_CUSTOMEFFECTS
+  -D WLED_MAX_USERMODS=8 ; default only 4-6
+  -D UWLED_USE_MY_CONFIG ; what does this do?
   -D USERMOD_AUDIOREACTIVE
-  -D UM_AUDIOREACTIVE_USE_NEW_FFT
+  -D UM_AUDIOREACTIVE_USE_NEW_FFT ; explain
   -D USERMOD_DALLASTEMPERATURE
-  -D USE_ALT_DISPlAY
+  -D USE_ALT_DISPlAY ; new versions of USERMOD_FOUR_LINE_DISPLAY and USERMOD_ROTARY_ENCODER_UI
   -D USERMOD_FOUR_LINE_DISPLAY
   -D USERMOD_ROTARY_ENCODER_UI
   -D USERMOD_AUTO_SAVE
-  -D USERMOD_WEATHER
-  -D USERMOD_GAMES
+  -D USERMOD_CUSTOMEFFECTS ; WLEDSR usermod
+  -D USERMOD_WEATHER ; WLEDSR usermod
+  -D USERMOD_GAMES ; WLEDSR usermod
   ; -D WLED_DEBUG
 lib_deps = ${esp32.lib_deps}
-  OneWire@~2.3.5
-  olikraus/U8g2 @ ^2.28.8
-  https://github.com/kosme/arduinoFFT#develop @ 1.9.2
-; monitor_filters = esp32_exception_decoder
+  OneWire@~2.3.5 ; used for USERMOD_FOUR_LINE_DISPLAY and USERMOD_GAMES?
+  olikraus/U8g2 @ ^2.28.8 ; used for USERMOD_FOUR_LINE_DISPLAY 
+  https://github.com/kosme/arduinoFFT#develop @ 1.9.2 ; used for USERMOD_AUDIOREACTIVE
+; monitor_filters = esp32_exception_decoder ; used to show crash details
 board_build.partitions = ${esp32.default_partitions}
 ; board_build.partitions = tools/WLED_ESP32_16MB.csv
-board_build.f_flash = 80000000L
-board_build.flash_mode = dio
+; board_build.partitions = tools/WLED_ESP32-wrover_4MB.csv
+board_build.f_flash = 80000000L ; explain
+board_build.flash_mode = dio ; explain (dio vs qio?)
 
 [env:esp8266mdev]
 extends = env:d1_mini