pio: start platformIO projects

pio/nrf52/test01/.gitignore

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+.pioenvs
+.piolibdeps
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json

pio/nrf52/test01/.vscode/extensions.json

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+{
+	// See http://go.microsoft.com/fwlink/?LinkId=827846
+	// for the documentation about the extensions.json format
+	"recommendations": [
+		"platformio.platformio-ide"
+	]
+}

pio/nrf52/test01/.vscode/settings.json

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+{
+	"terminal.integrated.env.linux": {
+		"PATH": "/home/kyle/.platformio/penv/bin:/home/kyle/.platformio/penv:/home/kyle/.cargo/bin:/home/kyle/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/kyle/go/bin",
+		"PLATFORMIO_CALLER": "vscode"
+	}
+}

pio/nrf52/test01/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
+|  |  |- library.json (optional, custom build options, etc) http://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--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

pio/nrf52/test01/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:nrf52_dk]
+platform = nordicnrf52
+board = nrf52_dk
+framework = arduino
+; upload_protocol = nrf

pio/nrf52/test01/src/main.cpp

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+#include <Arduino.h>
+
+const int ledPin = 17;
+
+void setup() {
+	pinMode(ledPin, OUTPUT);
+	digitalWrite(ledPin, HIGH);
+}
+
+void loop() {
+    // put your main code here, to run repeatedly:
+}