Initial readme up

examples/MultiDevice/platformio.ini

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+[env]
+lib_extra_dirs = ../..
+
+[env:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+
+; Serial monitor settings
+monitor_speed = 115200
+monitor_filters = esp32_exception_decoder
+
+; Build flags
+build_flags =
+    -DCORE_DEBUG_LEVEL=3
+
+; Library dependencies
+lib_deps =
+    ; VictronBLE library will be automatically included from parent directory
+
+; Optional: Specify partition scheme if needed
+; board_build.partitions = default.csv
+
+[env:esp32-s3]
+platform = espressif32
+board = esp32-s3-devkitc-1
+framework = arduino
+monitor_speed = 115200
+build_flags =
+    -DCORE_DEBUG_LEVEL=3
+
+[env:esp32-c3]
+platform = espressif32
+board = esp32-c3-devkitc-02
+framework = arduino
+monitor_speed = 115200
+build_flags =
+    -DCORE_DEBUG_LEVEL=3