Shrink LittleFS partition, grow OTA app slots

Web assets only use ~489 KB but the default 1.375 MB spiffs
partition wasted the rest. Rebalance to 768 KB spiffs / 1.56 MB
per app slot (was 1.25 MB), giving the tight esp32 build real
headroom (99.6% -> 79.7% flash used) while preserving dual-slot
OTA. Wire the custom layout into both the local PlatformIO build
(new partitions.csv + platformio.ini) and the Arduino-CLI CI/release
pipeline (PartitionScheme=custom, matching littlefs image size and
merge_bin offset).

.github/workflows/ci.yaml

@@ -44,7 +44,7 @@ jobs:
 
       - name: Create LittleFS
         run: |
-          ./mklittlefs/mklittlefs --create data --size 1441792 SomfyController.littlefs.bin
+          ./mklittlefs/mklittlefs --create data --size 786432 SomfyController.littlefs.bin
 
       - name: Upload binaries
         uses: actions/upload-artifact@v3
@@ -65,22 +65,22 @@ jobs:
           - board: esp32
             addr_bootloader: 0x1000
             chip: ESP32
-            fqbn: esp32:esp32:esp32
+            fqbn: esp32:esp32:esp32:PartitionScheme=custom
             name: ESP32
           - board: lolin_c3_mini
             addr_bootloader: 0x0
             chip: ESP32-C3
-            fqbn: esp32:esp32:lolin_c3_mini
+            fqbn: esp32:esp32:lolin_c3_mini:PartitionScheme=custom
             name: LOLIN-C3-mini
           - board: lolin_s2_mini
             addr_bootloader: 0x1000
             chip: ESP32-S2
-            fqbn: esp32:esp32:lolin_s2_mini
+            fqbn: esp32:esp32:lolin_s2_mini:PartitionScheme=custom
             name: LOLIN-S2-mini
           - board: lolin_s3_mini
             addr_bootloader: 0x0
             chip: ESP32-S3
-            fqbn: esp32:esp32:lolin_s3_mini
+            fqbn: esp32:esp32:lolin_s3_mini:PartitionScheme=custom
             name: LOLIN-S3-mini
 
     steps:
@@ -137,7 +137,7 @@ jobs:
             ${{ matrix.addr_bootloader }} build/SomfyController.ino.bootloader.bin \
             0x8000 build/SomfyController.ino.partitions.bin \
             0x10000 build/SomfyController.ino.bin \
-            0x290000 SomfyController.littlefs.bin
+            0x330000 SomfyController.littlefs.bin
 
       - name: Upload ${{ matrix.name }}
         uses: actions/upload-artifact@v3

.github/workflows/release.yaml

@@ -52,7 +52,7 @@ jobs:
 
       - name: Create LittleFS
         run: |
-          ./mklittlefs/mklittlefs --create data --size 1441792 SomfyController.littlefs.bin
+          ./mklittlefs/mklittlefs --create data --size 786432 SomfyController.littlefs.bin
 
       - name: Upload binaries
         uses: actions/upload-artifact@v4
@@ -83,32 +83,32 @@ jobs:
           - board: esp32
             addr_bootloader: 0x1000
             chip: ESP32
-            fqbn: esp32:esp32:esp32wrover:PartitionScheme=default,FlashMode=qio,FlashFreq=80,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
+            fqbn: esp32:esp32:esp32wrover:PartitionScheme=custom,FlashMode=qio,FlashFreq=80,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
-            #     esp32:esp32:esp32wrover:PartitionScheme=default,FlashMode=qio,FlashFreq=80,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
+            #     esp32:esp32:esp32wrover:PartitionScheme=custom,FlashMode=qio,FlashFreq=80,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
             name: ESP32
             obname: SomfyController.onboard.esp32.bin
             fwname: SomfyController.ino.esp32.bin
           - board: esp32c3
             addr_bootloader: 0x0
             chip: ESP32-C3
-            fqbn: esp32:esp32:esp32c3:JTAGAdapter=default,CDCOnBoot=cdc,PartitionScheme=default,CPUFreq=160,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
+            fqbn: esp32:esp32:esp32c3:JTAGAdapter=default,CDCOnBoot=cdc,PartitionScheme=custom,CPUFreq=160,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
-            #     esp32:esp32:esp32c3:JTAGAdapter=default,CDCOnBoot=default,PartitionScheme=default,CPUFreq=160,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
+            #     esp32:esp32:esp32c3:JTAGAdapter=default,CDCOnBoot=default,PartitionScheme=custom,CPUFreq=160,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
             name: ESP32C3
             obname: SomfyController.onboard.esp32c3.bin
             fwname: SomfyController.ino.esp32c3.bin
           - board: esp32s2
             addr_bootloader: 0x1000
             chip: ESP32-S2
-            fqbn: esp32:esp32:esp32s2:JTAGAdapter=default,CDCOnBoot=cdc,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PSRAM=disabled,PartitionScheme=default,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
+            fqbn: esp32:esp32:esp32s2:JTAGAdapter=default,CDCOnBoot=cdc,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PSRAM=disabled,PartitionScheme=custom,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
-            #     esp32:esp32:esp32s2:JTAGAdapter=default,CDCOnBoot=default,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PSRAM=disabled,PartitionScheme=default,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
+            #     esp32:esp32:esp32s2:JTAGAdapter=default,CDCOnBoot=default,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PSRAM=disabled,PartitionScheme=custom,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
             name: ESP32S2
             obname: SomfyController.onboard.esp32s2.bin
             fwname: SomfyController.ino.esp32s2.bin
           - board: esp32s3
             addr_bootloader: 0x0
             chip: ESP32-S3
-            fqbn: esp32:esp32:esp32s3:JTAGAdapter=default,PSRAM=disabled,FlashMode=qio,FlashSize=4M,LoopCore=1,EventsCore=1,USBMode=hwcdc,CDCOnBoot=cdc,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PartitionScheme=default,CPUFreq=240,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
+            fqbn: esp32:esp32:esp32s3:JTAGAdapter=default,PSRAM=disabled,FlashMode=qio,FlashSize=4M,LoopCore=1,EventsCore=1,USBMode=hwcdc,CDCOnBoot=cdc,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PartitionScheme=custom,CPUFreq=240,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
-            #     esp32:esp32:esp32s3:JTAGAdapter=default,PSRAM=disabled,FlashMode=qio,FlashSize=4M,LoopCore=1,EventsCore=1,USBMode=hwcdc,CDCOnBoot=cdc,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PartitionScheme=default,CPUFreq=240,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
+            #     esp32:esp32:esp32s3:JTAGAdapter=default,PSRAM=disabled,FlashMode=qio,FlashSize=4M,LoopCore=1,EventsCore=1,USBMode=hwcdc,CDCOnBoot=cdc,MSCOnBoot=default,DFUOnBoot=default,UploadMode=default,PartitionScheme=custom,CPUFreq=240,UploadSpeed=921600,DebugLevel=none,EraseFlash=none
             name: ESP32S3
             fwname: SomfyController.ino.esp32s3.bin
             obname: SomfyController.onboard.esp32s3.bin
@@ -172,7 +172,7 @@ jobs:
             ${{ matrix.addr_bootloader }} build${{ matrix.name }}/SomfyController.ino.bootloader.bin \
             0x8000 build${{ matrix.name }}/SomfyController.ino.partitions.bin \
             0x10000 build${{ matrix.name }}/SomfyController.ino.bin \
-            0x290000 SomfyController.littlefs.bin
+            0x330000 SomfyController.littlefs.bin
 
       - name: Upload Firmware ${{ matrix.name }}
         uses: shogo82148/actions-upload-release-asset@v1.7.5

partitions.csv

@@ -0,0 +1,7 @@
+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,  0x5000,
+otadata,  data, ota,     0xe000,  0x2000,
+app0,     app,  ota_0,   0x10000, 0x190000,
+app1,     app,  ota_1,   0x1A0000,0x190000,
+spiffs,   data, spiffs,  0x330000,0xC0000,
+coredump, data, coredump,0x3F0000,0x10000,

platformio.ini

@@ -0,0 +1,60 @@
+; PlatformIO configuration for ESPSomfy-RTS
+; Compatible with Arduino IDE (source files remain in project root)
+
+[platformio]
+src_dir = .
+default_envs = esp32
+
+[env]
+framework = arduino
+platform = espressif32@6.9.0
+monitor_speed = 115200
+upload_speed = 921600
+board_build.filesystem = littlefs
+board_build.flash_mode = qio
+board_build.partitions = partitions.csv
+lib_deps =
+    bblanchon/ArduinoJson@6.21.5
+    knolleary/PubSubClient@2.8.0
+    LSatan/SmartRC-CC1101-Driver-Lib@2.5.7
+    https://github.com/Links2004/arduinoWebSockets.git#2.4.0
+build_src_filter =
+    +<*.ino>
+    +<*.cpp>
+    +<*.h>
+    -<.github/>
+    -<icons/>
+
+[env:esp32]
+board = esp32dev
+
+[env:esp32c3]
+board = esp32-c3-devkitc-02
+board_build.mcu = esp32c3
+build_flags =
+    -DARDUINO_USB_MODE=1
+    -DARDUINO_USB_CDC_ON_BOOT=1
+
+[env:esp32s2]
+board = esp32-s2-saola-1
+board_build.mcu = esp32s2
+build_flags =
+    -DARDUINO_USB_CDC_ON_BOOT=1
+
+; ESP32-C6 requires Arduino ESP32 core 3.x (pioarduino platform fork).
+; Core 3.x has breaking API changes (ETH, tcpip_adapter removed, etc.)
+; that require source code modifications before this will compile.
+; [env:esp32c6]
+; platform = https://github.com/pioarduino/platform-espressif32/releases/download/53.03.11/platform-espressif32.zip
+; board = esp32-c6-devkitc-1
+; board_build.mcu = esp32c6
+; build_flags =
+;     -DARDUINO_USB_MODE=1
+;     -DARDUINO_USB_CDC_ON_BOOT=1
+
+[env:esp32s3]
+board = esp32-s3-devkitc-1
+board_build.mcu = esp32s3
+build_flags =
+    -DARDUINO_USB_MODE=1
+    -DARDUINO_USB_CDC_ON_BOOT=1