new platformio project

.gitignore

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+.pioenvs
+.piolibdeps
+.clang_complete
+.gcc-flags.json

.gitlab-ci.yml

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+build:
+  image: eclipse/platformio
+  script:
+#    - platformio lib -g install 1
+#    - platformio ci --board=esp32thing
+    - platformio run
+    - cp /home/user/.platformio/packages/framework-arduinoespressif32/tools/sdk/bin/bootloader.bin .pioenvs/esp32thing/
+    - cp /home/user/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin .pioenvs/esp32thing/
+# to flash: esptool.py --before default_reset --after hard_reset --chip esp32 --port "/dev/ttyUSB0" --baud 115200 write_flash -z --flash_mode dio --flash_freq 80m --flash_size 4MB 0x1000 "/home/user/.platformio/packages/framework-arduinoespressif32/tools/sdk/bin/bootloader.bin" 0x8000 ".pioenvs/esp32thing/partitions.bin" 0xe000 "/home/user/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin" 0x10000 .pioenvs/esp32thing/firmware.bin
+  artifacts:
+    paths:
+      - ".pioenvs/esp32thing/*.bin"

lib/readme.txt

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+
+This directory is intended for the project specific (private) libraries.
+PlatformIO will compile them to static libraries and link to executable file.
+
+The source code of each library should be placed in separate directory, like
+"lib/private_lib/[here are source files]".
+
+For example, see how can be organized `Foo` and `Bar` libraries:
+
+|--lib
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |- readme.txt --> THIS FILE
+|- platformio.ini
+|--src
+   |- main.c
+
+Then in `src/main.c` you should use:
+
+#include <Foo.h>
+#include <Bar.h>
+
+// rest H/C/CPP code
+
+PlatformIO will find your libraries automatically, configure preprocessor's
+include paths and build them.
+
+More information about PlatformIO Library Dependency Finder
+- http://docs.platformio.org/page/librarymanager/ldf.html

platformio.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; http://docs.platformio.org/page/projectconf.html
+
+[env:esp32thing]
+platform = espressif32
+board = esp32thing
+framework = arduino

src/main.cpp

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+/**
+ * Blink
+ *
+ * Turns on an LED on for one second,
+ * then off for one second, repeatedly.
+ *
+ * https://github.com/platformio/platformio-examples/tree/develop/espressif
+ */
+#include "Arduino.h"
+
+#define LED_PIN 5
+
+void setup()
+{
+  // initialize LED digital pin as an output.
+  pinMode(LED_PIN, OUTPUT);
+}
+
+void loop()
+{
+  // turn the LED on (HIGH is the voltage level)
+  digitalWrite(LED_PIN, HIGH);
+
+  // wait for a second
+  delay(1000);
+
+  // turn the LED off by making the voltage LOW
+  digitalWrite(LED_PIN, LOW);
+
+   // wait for a second
+  delay(1000);
+}