PIO setup for an ESP32 Arduino project with Hardware I2C and Serial support

see also:  https://github.com/espressif/arduino-esp32/releases/tag/2.0.1-RC1

espressif/arduino-esp32#5436

Author: Michael Haberler

.gitignore

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+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+# platformio & vscode
+.pio/*
+.vscode/*
+
+untracked/*
+
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

default_16MB.csv

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+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,  0x5000,
+otadata,  data, ota,     0xe000,  0x2000,
+app0,     app,  ota_0,   0x10000, 0x640000,
+app1,     app,  ota_1,   0x650000,0x640000,
+spiffs,   data, spiffs,  0xc90000,0x370000,

platformio.ini

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+; PlatformIO Project Configuration File
+
+[common_env_data]
+monitor_speed = 115200
+upload_speed = 921600
+
+; fix as needed
+windows_device = COM12
+macos_device = /dev/cu.SLAB_USBtoUART
+
+[env:m5stack-core2]
+platform = https://github.com/platformio/platform-espressif32.git#feature/arduino-upstream
+
+
+board = m5stack-core2
+
+framework = arduino
+platform_packages =
+    framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#2.0.1-RC1
+    espressif/toolchain-xtensa-esp32 @ 8.4.0+2021r1
+
+build_type = debug
+build_flags = 
+debug_build_flags = -g -O0  
+
+board_build.partitions = default_16MB.csv
+upload_port = ${common_env_data.macos_device}
+monitor_port = ${common_env_data.macos_device}
+monitor_speed = ${common_env_data.monitor_speed}
+
+

src/main.cpp

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+#include <Arduino.h>
+
+void setup() {
+  // put your setup code here, to run once:
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+}