From 54eb42d658e8811f81051196a51d81ed7d79f6cc Mon Sep 17 00:00:00 2001
From: Frank <frank.moehle@outlook.de>
Date: Thu, 30 Mar 2023 00:20:01 +0200
Subject: [PATCH] build env for -C3 with only 2MB flash

based on proposal from  in PR #2951 by @andyshinn.
2MB does not allow to have an OTA partition, so this feature is disabled.
---
 platformio.ini                 | 18 ++++++++++++++++++
 tools/WLED_ESP32_2MB_noOTA.csv |  5 +++++
 2 files changed, 23 insertions(+)
 create mode 100644 tools/WLED_ESP32_2MB_noOTA.csv

diff --git a/platformio.ini b/platformio.ini
index 6b7a3d01..277aba9c 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -585,6 +585,24 @@ lib_deps = ${esp32s2.lib_deps}
 # custom board configurations
 # ------------------------------------------------------------------------------
 
+[env:esp32c3dev_2MB]
+;; for ESP32-C3 boards with 2MB flash (instead of 4MB).
+;; this board need a specific partition file. OTA not possible.
+extends = esp32c3
+platform = ${esp32c3.platform}
+platform_packages = ${esp32c3.platform_packages}
+board = esp32-c3-devkitm-1
+build_flags = ${common.build_flags} ${esp32c3.build_flags} #-D WLED_RELEASE_NAME=ESP32-C3
+  -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
+build_unflags = ${common.build_unflags}
+upload_speed = 115200
+lib_deps = ${esp32c3.lib_deps}
+board_build.partitions = tools/WLED_ESP32_2MB_noOTA.csv
+board_build.flash_mode = dio
+
 [env:wemos_shield_esp32]
 board = esp32dev
 platform = espressif32@3.2
diff --git a/tools/WLED_ESP32_2MB_noOTA.csv b/tools/WLED_ESP32_2MB_noOTA.csv
new file mode 100644
index 00000000..7a1cf15f
--- /dev/null
+++ b/tools/WLED_ESP32_2MB_noOTA.csv
@@ -0,0 +1,5 @@
+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,    20K,
+otadata,  data, ota,     0xe000,    8K,
+app0,     app,  ota_0,   0x10000,   1536K,
+spiffs,   data, spiffs,  0x190000,  384K,