new MM build for -C3 with 2MB flash (no OTA)

Author: softhack007

platformio.ini

@@ -80,6 +80,7 @@ default_envs =
   ;; esp32s2_tinyUF2_PSRAM_S  ;; experimental - only for adafruit -S2 boards with tinyUF2 bootloader !!!
   esp32s2_PSRAM_M          ;; experimental
   esp32c3dev_4MB_M         ;; experimental
+  esp32c3dev_2MB_M         ;; experimental - 2MB Flash, no OTA
   esp32c3mini_dio_4MB_M    ;; for boards that need "dio" flash mode (instead of qio)
   seeed_esp32c3_4MB_S      ;; experimental
   esp32_4MB_V4_S           ;; experimental
@@ -2180,6 +2181,33 @@ build_flags = ${env:esp32c3dev_4MB_M.build_flags}
 ; RAM:   [===       ]  25.8% (used 84700 bytes from 327680 bytes)
 ; Flash: [==========]  98.7% (used 1552582 bytes from 1572864 bytes)
 
+[env:esp32c3dev_2MB_M]
+extends = env:esp32c3dev_4MB_M
+board = lolin_c3_mini
+;;; replace WLED_RELEASE_NAME, disable CDC_ON_BOOT
+build_unflags = ${env:esp32c3dev_4MB_M.build_unflags}
+  -DARDUINO_USB_CDC_ON_BOOT=1
+  -D WLED_RELEASE_NAME=esp32c3dev_4MB_M
+
+;;; 2MB Flash, no OTA
+board_build.partitions = tools/WLED_ESP32_2MB_noOTA.csv
+board_build.flash_mode = dio
+board_upload.flash_size = 2MB
+board_upload.maximum_size = 2097152
+
+build_flags = ${env:esp32c3dev_4MB_M.build_flags}
+  -D WLED_WATCHDOG_TIMEOUT=0
+  -D WLED_DISABLE_OTA
+  ; -DARDUINO_USB_CDC_ON_BOOT=1 ;; for virtual CDC USB
+  -DARDUINO_USB_CDC_ON_BOOT=0   ;; for serial-to-USB chip
+  -D WLED_RELEASE_NAME=esp32c3dev_2MB_M
+  -D WLED_DISABLE_BROWNOUT_DET    ;; the board only has a 500mA LDO, better to disable brownout detection
+  -D WLED_DISABLE_ADALIGHT        ;; to disable serial protocols for boards with CDC USB (Serial RX will receive junk commands, unless its pulled down by resistor)
+  -D HW_PIN_SDA=0 -D HW_PIN_SCL=1 ;; avoid pin conflicts
+
+; RAM:   [===       ]  25.3% (used 82828 bytes from 327680 bytes)
+; Flash: [==========]  97.9% (used 1540138 bytes from 1572864 bytes)
+
 ;; MM environment for "seeed xiao -C3" boards
 [env:seeed_esp32c3_4MB_S]
 extends = env:esp32c3dev_4MB_M