Hello, PlatformIO!

Firmware/EggbotWireless/.clang-format

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+---
+Language:        Cpp
+BasedOnStyle:  Google
+IndentWidth: 4
+...
+

Firmware/EggbotWireless/.gitignore

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

Firmware/EggbotWireless/.travis.yml

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+# Continuous Integration (CI) is the practice, in software
+# engineering, of merging all developer working copies with a shared mainline
+# several times a day < https://docs.platformio.org/page/ci/index.html >
+#
+# Documentation:
+#
+# * Travis CI Embedded Builds with PlatformIO
+#   < https://docs.travis-ci.com/user/integration/platformio/ >
+#
+# * PlatformIO integration with Travis CI
+#   < https://docs.platformio.org/page/ci/travis.html >
+#
+# * User Guide for `platformio ci` command
+#   < https://docs.platformio.org/page/userguide/cmd_ci.html >
+#
+#
+# Please choose one of the following templates (proposed below) and uncomment
+# it (remove "# " before each line) or use own configuration according to the
+# Travis CI documentation (see above).
+#
+
+
+#
+# Template #1: General project. Test it using existing `platformio.ini`.
+#
+
+# language: python
+# python:
+#     - "2.7"
+#
+# sudo: false
+# cache:
+#     directories:
+#         - "~/.platformio"
+#
+# install:
+#     - pip install -U platformio
+#     - platformio update
+#
+# script:
+#     - platformio run
+
+
+#
+# Template #2: The project is intended to be used as a library with examples.
+#
+
+# language: python
+# python:
+#     - "2.7"
+#
+# sudo: false
+# cache:
+#     directories:
+#         - "~/.platformio"
+#
+# env:
+#     - PLATFORMIO_CI_SRC=path/to/test/file.c
+#     - PLATFORMIO_CI_SRC=examples/file.ino
+#     - PLATFORMIO_CI_SRC=path/to/test/directory
+#
+# install:
+#     - pip install -U platformio
+#     - platformio update
+#
+# script:
+#     - platformio ci --lib="." --board=ID_1 --board=ID_2 --board=ID_N

Firmware/EggbotWireless/include/Pen.h

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+#include <Servo.h>
+
+#ifndef PEN_H
+#define PEN_H
+
+class Pen {
+   private:
+    int posEngaged;
+    int posDisengaged;
+    Servo servo;
+
+   public:
+    Pen(int pin, int posEngaged, int posDisengaged);
+    void engage();
+    void disengage();
+    ~Pen();
+};
+
+#endif

Firmware/EggbotWireless/include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

Firmware/EggbotWireless/include/Stepper.h

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+#ifndef STEPPER_H
+#define STEPPER_H
+
+class Stepper {
+   private:
+    unsigned int stepsPerRevolution;
+    int pin1;
+    int pin2;
+    int pin3;
+    int pin4;
+    int speedDelay;
+    void clockwise();
+    void counterClockwise();
+
+   public:
+    Stepper(int pin1, int pin2, int pin3, int pin4, int stepsPerRevolution, int rpm);
+    ~Stepper();
+    void step(int steps);
+    void move(float degrees);
+};
+
+#endif

Firmware/EggbotWireless/lib/README

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+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

Firmware/EggbotWireless/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:d1_mini]
+platform = espressif8266
+board = d1_mini
+framework = arduino

Firmware/EggbotWireless/src/Pen.cpp

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+#include <Servo.h>
+#include "Pen.h"
+
+Pen::Pen(int pin, int posEngaged, int posDisengaged)
+    : posEngaged(posEngaged), posDisengaged(posDisengaged) {
+    servo.attach(pin);
+}
+
+void Pen::engage() { servo.write(posEngaged); }
+
+void Pen::disengage() { servo.write(posDisengaged); }
+
+Pen::~Pen() {}

Firmware/EggbotWireless/src/Stepper.cpp

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+#include "Stepper.h"
+#include <Arduino.h>
+
+void Stepper::clockwise() {
+    digitalWrite(pin4, HIGH);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin1, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin4, HIGH);
+    digitalWrite(pin3, HIGH);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin1, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin4, LOW);
+    digitalWrite(pin3, HIGH);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin1, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin4, LOW);
+    digitalWrite(pin3, HIGH);
+    digitalWrite(pin2, HIGH);
+    digitalWrite(pin1, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin4, LOW);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin2, HIGH);
+    digitalWrite(pin1, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin4, LOW);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin2, HIGH);
+    digitalWrite(pin1, HIGH);
+    delay(speedDelay);
+
+    digitalWrite(pin4, LOW);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin1, HIGH);
+    delay(speedDelay);
+
+    digitalWrite(pin4, HIGH);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin1, HIGH);
+    delay(speedDelay);
+}
+
+void Stepper::counterClockwise() {
+    digitalWrite(pin1, HIGH);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin4, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin1, HIGH);
+    digitalWrite(pin2, HIGH);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin4, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin1, LOW);
+    digitalWrite(pin2, HIGH);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin4, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin1, LOW);
+    digitalWrite(pin2, HIGH);
+    digitalWrite(pin3, HIGH);
+    digitalWrite(pin4, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin1, LOW);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin3, HIGH);
+    digitalWrite(pin4, LOW);
+    delay(speedDelay);
+
+    digitalWrite(pin1, LOW);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin3, HIGH);
+    digitalWrite(pin4, HIGH);
+    delay(speedDelay);
+
+    digitalWrite(pin1, LOW);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin4, HIGH);
+    delay(speedDelay);
+
+    digitalWrite(pin1, HIGH);
+    digitalWrite(pin2, LOW);
+    digitalWrite(pin3, LOW);
+    digitalWrite(pin4, HIGH);
+    delay(speedDelay);
+}
+
+Stepper::Stepper(int pin1, int pin2, int pin3, int pin4, int stepsPerRevolution,
+                 int rpm)
+    : pin1(pin1),
+      pin2(pin2),
+      pin3(pin3),
+      pin4(pin4),
+      stepsPerRevolution(stepsPerRevolution) {
+    pinMode(pin1, OUTPUT);
+    pinMode(pin2, OUTPUT);
+    pinMode(pin3, OUTPUT);
+    pinMode(pin4, OUTPUT);
+
+    speedDelay = 60 * 1000 / (rpm * stepsPerRevolution);
+}
+Stepper::~Stepper() {}
+
+void Stepper::step(int steps) {
+    int halfsteps = steps / 8;
+    if (halfsteps > 0) {
+        for (int i = 0; i < halfsteps; i++) {
+            clockwise();
+        }
+    } else if (halfsteps < 0) {
+        halfsteps = abs(halfsteps);
+        for (int i = 0; i < halfsteps; i++) {
+            counterClockwise();
+        }
+    }
+}
+
+void Stepper::move(float degrees) {
+    int steps = (degrees * stepsPerRevolution) / 360;
+    step(steps);
+}

Firmware/EggbotWireless/src/main.cpp

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+#include <Arduino.h>
+#include "Stepper.h"
+#include "Pen.h"
+
+Stepper eggStepper(D1, D2, D3, D4, 4076, 6);
+Stepper servoStepper(D5, D6, D7, D8, 4076, 6);
+Pen pen(D0, 180, 80);
+
+void setup() {
+    Serial.begin(115200);
+}
+
+void loop() {
+    Serial.print("Hello!\n");
+    delay(1000);
+}

Firmware/EggbotWireless/test/README

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+
+This directory is intended for PIO Unit Testing 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 PIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html