BREAKING CHANGE: repartition to double sketch size

this updates the partition scheme for 4 MB devices to have only a single
app partition, making OTA updates impossible. the new environment is
called "generic_esp32_4mb_no_ota".

another new environment is added, called "generic_esp32_8mb", which uses
the new common partition layout, where the previous two app partitions
are merged into one, and one additional such app partition is added to
the back of the table.

the environments "generic" and "generic_esp32" are removed. the former
was merely a version of "generic_esp32" with some pins pre-defined. we
want users to install a pin_mapping.json and use the generic firmwares.

the change preserves the littlefs partition (position and size),
allowing for upgrades without loosing the configuration.

users must flash the factory.bin for their respective environment using
esptool (or compatible software) using the USB port of their board. in
other words: updating to the new partition scheme using an OTA update is
NOT possible.

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: OpenDTU-onBattery Build
+name: OpenDTU-OnBattery Build
 
 on:
   push:
@@ -8,7 +8,7 @@ on:
     branches:
       - master
       - development
-    tags-ignore:        
+    tags-ignore:
       - 'v**'
   pull_request:
     paths-ignore:
@@ -120,6 +120,7 @@ jobs:
           name: opendtu-onbattery-${{ matrix.environment }}
           path: |
             .pio/build/${{ matrix.environment }}/opendtu-onbattery-${{ matrix.environment }}.bin
+            !.pio/build/generic_esp32_4mb_no_ota/opendtu-onbattery-generic_esp32_4mb_no_ota.bin
             .pio/build/${{ matrix.environment }}/opendtu-onbattery-${{ matrix.environment }}.factory.bin
 
   release:
@@ -130,14 +131,14 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      
+
       - name: Get tags
         run: git fetch --force --tags origin
 
       - name: Get openDTU core release
         run: |
           echo "OPEN_DTU_CORE_RELEASE=$(git for-each-ref --sort=creatordate --format '%(refname) %(creatordate)' refs/tags | grep 'refs/tags/v' | tail -1 | sed 's#.*/##' | sed 's/ .*//')" >> $GITHUB_ENV
-      
+
       - name: Create openDTU-core-release-Badge
         uses: schneegans/[email protected]
         with:

partitions_custom_4mb.csv

@@ -1,6 +1,5 @@
 # Name,   Type, SubType, Offset,   Size,    Flags
 nvs,      data, nvs,     0x9000,   0x5000,
 otadata,  data, ota,     0xe000,   0x2000,
-app0,     app,  ota_0,   0x10000,  0x1E0000,
-app1,     app,  ota_1,   0x1F0000, 0x1E0000,
+app0,     app,  ota_0,   0x10000,  0x3C0000,
 spiffs,   data, spiffs,  0x3D0000, 0x30000,

partitions_custom_8mb.csv

@@ -0,0 +1,6 @@
+# Name,   Type, SubType, Offset,   Size,    Flags
+nvs,      data, nvs,     0x9000,   0x5000,
+otadata,  data, ota,     0xe000,   0x2000,
+app0,     app,  ota_0,   0x10000,  0x3C0000,
+spiffs,   data, spiffs,  0x3D0000, 0x30000,
+app1,     app,  ota_1,   0x400000, 0x3C0000,

platformio.ini

@@ -9,17 +9,14 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [platformio]
-default_envs = generic_esp32
+default_envs = generic_esp32s3_usb
 extra_configs =
     platformio_override.ini
 
 [env]
 ; Make sure to NOT add any spaces in the custom_ci_action property
 ; (also the position in the file is important)
-; disabling generic and generic_esp32 until we decided on how to handle
-; the overflowing sketch partition for all ESP32 with 4MB flash.
-; custom_ci_action = generic,generic_esp32,generic_esp32s3,generic_esp32s3_usb
-custom_ci_action = generic_esp32s3,generic_esp32s3_usb
+custom_ci_action = generic_esp32_4mb_no_ota,generic_esp32_8mb,generic_esp32s3,generic_esp32s3_usb
 
 framework = arduino
 platform = [email protected]
@@ -57,7 +54,7 @@ extra_scripts =
     pre:pio-scripts/patch_apply.py
     post:pio-scripts/create_factory_bin.py
 
-board_build.partitions = partitions_custom_4mb.csv
+board_build.partitions = partitions_custom_8mb.csv
 board_build.filesystem = littlefs
 board_build.embed_files =
     webapp_dist/index.html.gz
@@ -78,7 +75,13 @@ upload_protocol = esptool
 ; upload_port = COM4
 
 
-[env:generic_esp32]
+[env:generic_esp32_4mb_no_ota]
+board = esp32dev
+build_flags = ${env.build_flags}
+board_build.partitions = partitions_custom_4mb.csv
+
+
+[env:generic_esp32_8mb]
 board = esp32dev
 build_flags = ${env.build_flags}