diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..1e3f52b
Binary files /dev/null and b/.DS_Store differ
diff --git a/partitions_custom.csv b/partitions_custom.csv
new file mode 100644
index 0000000..ecf102f
--- /dev/null
+++ b/partitions_custom.csv
@@ -0,0 +1,6 @@
+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,  0x5000,
+otadata,  data, ota,     0xe000,  0x2000,
+app0,     app,  factory, 0x10000, 0x1E0000,
+app1,     app,  ota_0,   0x1F0000, 0x1E0000,
+spiffs,   data, spiffs,  0x3D0000, 0x20000,
\ No newline at end of file
diff --git a/platformio.ini b/platformio.ini
index b9dcab6..31609cc 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -15,7 +15,8 @@ board = wt32-eth01
 framework = arduino
 lib_deps = siwats/ESPMegaPROR3@^2.9.4
 monitor_speed = 115200
-build_flags = -DCORE_DEBUG_LEVEL=0 -DSW_VERSION='"cud-3.0.5-duct"' -DBOARD_MODEL='"ESPMegaPRO R3.3c"' -DAC_TYPE=AC_TYPE_DUCTED
+board_build.partitions = partitions_custom.csv
+build_flags = -DCORE_DEBUG_LEVEL=0 -DSW_VERSION='"cud-dev-duct"' -DBOARD_MODEL='"ESPMegaPRO R3.3c"' -DAC_TYPE=AC_TYPE_DUCTED
 
 ; Ceiling A/C Variant (and newer ducted models)
 [env:satitm-ceiling]
@@ -24,4 +25,5 @@ board = wt32-eth01
 framework = arduino
 lib_deps = siwats/ESPMegaPROR3@^2.9.4
 monitor_speed = 115200
-build_flags = -DCORE_DEBUG_LEVEL=0 -DSW_VERSION='"cud-3.0.5-ceiling"' -DBOARD_MODEL='"ESPMegaPRO R3.3c"' -DAC_TYPE=AC_TYPE_CEILING
\ No newline at end of file
+board_build.partitions = partitions_custom.csv
+build_flags = -DCORE_DEBUG_LEVEL=0 -DSW_VERSION='"cud-dev-ceiling"' -DBOARD_MODEL='"ESPMegaPRO R3.3c"' -DAC_TYPE=AC_TYPE_CEILING
\ No newline at end of file