add target for latest Arduino v3 RC1

platformio.ini

@@ -66,6 +66,8 @@ extra_scripts =
   pre:scripts/build_interface.py
   scripts/rename_fw.py
 
+
+
 [env]
 monitor_speed = 115200
 monitor_filters = direct, esp32_exception_decoder
@@ -187,6 +189,27 @@ build_flags =
   ${espressi32_base.build_flags}
   '-DEMSESP_DEFAULT_BOARD_PROFILE="S32S3"'
 
+# for testing against the latest Arduino core v3 with IDF 5.1
+[env:espressi32_v3]
+platform = espressif32
+platform_packages=
+  platformio/framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#3.0.0-rc1
+  platformio/framework-arduinoespressif32-libs @ https://github.com/espressif/esp32-arduino-libs.git#idf-release/v5.1
+framework = arduino
+board = esp32dev
+board_build.filesystem = littlefs
+build_flags =
+  ${factory_settings.build_flags}
+  ${common.my_build_flags}
+  -D ONEWIRE_CRC16=0
+  -D NO_GLOBAL_ARDUINOOTA
+  -D ARDUINOJSON_ENABLE_STD_STRING=1
+  -D ARDUINOJSON_USE_DOUBLE=0
+  -D ARDUINOTRACE_ENABLE=0
+  -D CONFIG_ETH_ENABLED
+  -D CONFIG_UART_ISR_IN_IRAM
+  -D CONFIG_ASYNC_TCP_STACK_SIZE=5120
+
 ; to build and run: pio run -e standalone -t exec
 [env:standalone]
 platform = native