add pio intro

07_platformio_intro/.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

07_platformio_intro/.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"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

07_platformio_intro/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
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp32doit-devkit-v1]
+platform = espressif32
+board = esp32doit-devkit-v1
+framework = arduino
+monitor_speed = 115200
+lib_deps = 
+	arkhipenko/TaskScheduler@^3.8.5
+	fastled/FastLED@^3.9.13
+	0nism/ESP32-DHT11@^1.0.1

07_platformio_intro/src/main.cpp

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+#include <Arduino.h>
+#include <TaskScheduler.h>
+
+Scheduler ts;
+
+void task1Callback() {
+  Serial.println("Task 1 executed");
+}
+void task2Callback() {
+  Serial.println("Task 2 executed");
+}
+
+Task t1(1000, TASK_FOREVER, &task1Callback);
+Task t2(2500, TASK_FOREVER, &task2Callback);
+
+void setup() {
+  Serial.begin(115200);
+  ts.init();
+  ts.addTask(t1);
+  ts.addTask(t2);
+  t1.enable();
+  t2.enable();
+}
+
+void loop() {
+  ts.execute();
+}

07_platformio_intro/test/README

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+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html