Initial commit

.gitignore

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

.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"
+    ]
+}

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

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

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:lolin32_lite]
+; platform = espressif32
+; board = lolin32_lite
+; framework = arduino
+
+[env:lolin32]
+platform = espressif32
+board = lolin32
+framework = arduino
+monitor_speed = 115200
+upload_port = /dev/ttyUSB0
+monitor_port = /dev/ttyUSB0
+
+; [env:nanoatmega328new]
+; platform = atmelavr
+; board = nanoatmega328new
+; framework = arduino
+; upload_port = /dev/ttyUSB0
+; monitor_speed = 115200
+; monitor_port = /dev/ttyUSB0

src/LED.cpp

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+#include <Arduino.h>
+#include "LEDOutput.cpp"
+
+class LED{
+	LEDOutput* _output;
+	bool _on;
+	unsigned long _fadeDurationOn, _fadeDurationOff, _fadeStart, _fadeEnd;
+
+	unsigned long getFadeDuration(){
+		return _on ? _fadeDurationOn : _fadeDurationOff;
+	}
+
+	unsigned long getRemainingFadeTime(){
+		unsigned long now = millis();
+		return _fadeEnd >= now ? constrain(_fadeEnd - now, 0, getFadeDuration()) : 0;
+	}
+
+	float getMultiplier() {
+		float value = getRemainingFadeTime() / (float)getFadeDuration();
+		return 1.0f - value;
+	}
+
+	float getOutputMultiplier(){
+		float value = getMultiplier();
+		return _on ? value : 1.0f - value;
+	}
+
+	void reset(bool on){
+		if (on == _on)
+			return;
+		float oldMultiplier = getMultiplier();
+		_on = on;
+		_fadeStart = millis();
+		_fadeEnd = _fadeStart + (getFadeDuration() * oldMultiplier);
+	}
+
+public:
+	LED(LEDOutput* output, unsigned long fadeDurationOn, unsigned long fadeDurationOff) {
+		_output = output;
+		_fadeDurationOn = fadeDurationOn;
+		_fadeDurationOff = fadeDurationOff;
+	}
+
+	void on(){
+		reset(true);
+	}
+
+	void off(){
+		reset(false);
+	}
+
+	void toggle(){
+		reset(!_on);
+	}
+
+	void loop() {
+		float multiplier = getOutputMultiplier();
+		_output->writeFraction(1 - multiplier);
+	}
+};

src/LEDOutput.cpp

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+#include <Arduino.h>
+
+#define LED_OUTPUT_FREQUENCY 490
+#define LED_OUTPUT_RESOLUTION 15
+#define LED_OUTPUT_PWM_RANGE 32767
+
+class LEDOutput {
+	unsigned int _channel;
+
+  public:
+	LEDOutput(unsigned int channel) {
+		_channel = channel;
+		ledcSetup(channel, LED_OUTPUT_FREQUENCY, LED_OUTPUT_RESOLUTION);
+	}
+
+	void attach(unsigned int pin){
+		ledcAttachPin(pin, _channel);
+	}
+	void writeFraction(float fraction){
+		ledcWrite(_channel, fraction * LED_OUTPUT_PWM_RANGE);
+	}
+};

src/Timer.cpp

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+#include <Arduino.h>
+
+class Timer{
+private:
+	unsigned long _interval, _lastTick;
+	void (*_callback)(void);
+
+public:
+	Timer(unsigned long interval, void (*callback)(void)){
+		_interval = interval;
+		_callback = callback;
+		_lastTick = millis();
+	}
+
+	void loop(){
+		unsigned long tick = millis();
+
+		if (tick - _lastTick >= _interval){
+			_callback();
+			_lastTick = tick;
+		}
+	}
+};

src/main.cpp

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+#include "LED.cpp"
+#include "Timer.cpp"
+#include <Arduino.h>
+#include <BLEDevice.h>
+#include <BLEServer.h>
+#include <BLEUtils.h>
+
+#define FADE_IN_DURATION 500
+#define FADE_OUT_DURATION 2000
+
+#define SERVICE_UUID "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
+#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
+
+class BluetoothCallback : public BLECharacteristicCallbacks {
+	LED *_led;
+	void onWrite(BLECharacteristic *pCharacteristic) {
+		std::string value = pCharacteristic->getValue();
+		if (value.length() > 0) {
+			Serial.println(value.c_str());
+			if (value == "on")
+				_led->on();
+			else
+				_led->off();
+		}
+	}
+
+	public:
+
+	BluetoothCallback(LED* led){
+		_led = led;
+	}
+
+};
+
+LEDOutput _ledOutput(0);
+LED _led(&_ledOutput, FADE_IN_DURATION, FADE_OUT_DURATION);
+
+void toggle(){
+	//_led.toggle();
+}
+
+Timer _timer(3000, &toggle);
+
+void setup() {
+	Serial.begin(115200);
+	_ledOutput.attach(16);
+	_ledOutput.attach(17);
+	_ledOutput.attach(5);
+	_ledOutput.attach(18);
+	_ledOutput.attach(23);
+
+	BLEDevice::init("Van Lights");
+	BLEServer *pServer = BLEDevice::createServer();
+	BLEService *pService = pServer->createService(SERVICE_UUID);
+	BLECharacteristic *pCharacteristic = pService->createCharacteristic(CHARACTERISTIC_UUID, BLECharacteristic::PROPERTY_READ | BLECharacteristic::PROPERTY_WRITE);
+
+	pCharacteristic->setCallbacks(new BluetoothCallback(&_led));
+
+	pCharacteristic->setValue("Hello World");
+	pService->start();
+
+	BLEAdvertising *pAdvertising = pServer->getAdvertising();
+	pAdvertising->start();
+}
+
+void loop() {
+	_led.loop();
+	_timer.loop();
+}

test/README

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