Initial commit

.gitignore

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

.vscode/extensions.json

+{
+    // 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"
+    ]
+}

.vscode/settings.json

+{
+  "C_Cpp_Runner.msvcBatchPath": "",
+  "C_Cpp_Runner.cCompilerPath": "gcc",
+  "C_Cpp_Runner.cppCompilerPath": "g++",
+  "C_Cpp_Runner.debuggerPath": "gdb",
+  "C_Cpp_Runner.cStandard": "",
+  "C_Cpp_Runner.cppStandard": "",
+  "C_Cpp_Runner.useMsvc": false,
+  "C_Cpp_Runner.warnings": [
+    "-Wall",
+    "-Wextra",
+    "-Wpedantic",
+    "-Wshadow",
+    "-Wformat=2",
+    "-Wcast-align",
+    "-Wconversion",
+    "-Wsign-conversion",
+    "-Wnull-dereference"
+  ],
+  "C_Cpp_Runner.msvcWarnings": [
+    "/W4",
+    "/permissive-",
+    "/w14242",
+    "/w14287",
+    "/w14296",
+    "/w14311",
+    "/w14826",
+    "/w44062",
+    "/w44242",
+    "/w14905",
+    "/w14906",
+    "/w14263",
+    "/w44265",
+    "/w14928"
+  ],
+  "C_Cpp_Runner.enableWarnings": true,
+  "C_Cpp_Runner.warningsAsError": false,
+  "C_Cpp_Runner.compilerArgs": [],
+  "C_Cpp_Runner.linkerArgs": [],
+  "C_Cpp_Runner.includePaths": [],
+  "C_Cpp_Runner.includeSearch": [
+    "*",
+    "**/*"
+  ],
+  "C_Cpp_Runner.excludeSearch": [
+    "**/build",
+    "**/build/**",
+    "**/.*",
+    "**/.*/**",
+    "**/.vscode",
+    "**/.vscode/**"
+  ],
+  "C_Cpp_Runner.useAddressSanitizer": false,
+  "C_Cpp_Runner.useUndefinedSanitizer": false,
+  "C_Cpp_Runner.useLeakSanitizer": false,
+  "C_Cpp_Runner.showCompilationTime": false,
+  "C_Cpp_Runner.useLinkTimeOptimization": false,
+  "C_Cpp_Runner.msvcSecureNoWarnings": false
+}
\ No newline at end of file

include/README

+
+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

+
+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

+; 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
+lib_deps = knolleary/PubSubClient@^2.8
+

src/main.cpp

+#include <Arduino.h>
+#include <WiFi.h>
+#include <PubSubClient.h>
+
+const char* ssid = "AlexesIphone";
+const char* password = "bluecomet";
+const char* mqtt_server = "test.mosquitto.org"; //broker, test server
+#define mqtt_port 1883 //defualt port number
+#define MQTT_SERIAL_PUBLISH_CH "bcomet/serialdata/tx"                     
+#define MQTT_SERIAL_SUBSCRIBE_CH  "bcomet/serialdata/tx"    
+#define uS_TO_S_FACTOR 1000000ULL  /* Conversion factor for micro seconds to seconds */
+#define TIME_TO_SLEEP  10        /* Time ESP32 will go to sleep (in seconds) */                                    //"csc113/serialdata/tx"
+
+//these are all pins based on the esp32s device
+const int player1ButtonPin = 15; 
+const int player2ButtonPin = 4;
+const int ledPin = 2;
+const int buttonStart = 0;
+const int buzzerPin = 12;
+
+//variables to check the button presses.
+int buttonState;
+int buttonState2;
+int buttonState3;
+
+//variables to control the pace and setup of the game
+bool gameSetup = false;
+bool gameStart = false;
+bool winnerFound = false;
+bool isConnected = false;
+bool goToSleep = false;
+
+WiFiClient wifiClient;
+
+PubSubClient client(wifiClient); //making pubsubclient
+
+void setup_wifi() {
+    delay(10);
+    // We start by connecting to a WiFi network
+    Serial.println();
+    Serial.print("Connecting to ");
+    Serial.println(ssid);
+    WiFi.begin(ssid, password);
+    while (WiFi.status() != WL_CONNECTED) {
+      delay(500);
+      Serial.print(".");
+    }
+    randomSeed(micros());
+    Serial.println("");
+    Serial.println("WiFi connected");
+    Serial.println("IP address: ");
+    Serial.println(WiFi.localIP());
+}
+
+void reconnect() {
+  // Loop until we're reconnected
+  while (!client.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    // Create a random client ID
+    String clientId = "ESP32Client-AlexesP"; //unique id for each client
+    clientId += String(random(0xffff), HEX); //makes sure the id is unique.
+    // Attempt to connect
+    //if (client.connect(clientId.c_str(),MQTT_USER,MQTT_PASSWORD)) 
+    if (client.connect(clientId.c_str()) )
+    {
+      Serial.println("connected");
+      isConnected = true;
+      // subscribe
+      client.subscribe(MQTT_SERIAL_SUBSCRIBE_CH);
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(client.state());
+      Serial.println(" try again in 5 seconds");
+      // Wait 5 seconds before retrying
+      delay(5000);
+    }
+  }
+}
+
+void callback(char* topic, byte *payload, unsigned int length) {
+    Serial.println("-------new message from broker-----");
+    Serial.print("channel:");
+    Serial.println(topic);
+    Serial.print("data:");  
+    Serial.write(payload, length);
+    Serial.println();
+}
+
+void print_wakeup_reason(){
+  esp_sleep_wakeup_cause_t wakeup_reason;
+
+  wakeup_reason = esp_sleep_get_wakeup_cause();
+
+  switch(wakeup_reason)
+  {
+    case ESP_SLEEP_WAKEUP_EXT0 : Serial.println("Wakeup caused by external signal using RTC_IO"); break;
+    case ESP_SLEEP_WAKEUP_EXT1 : Serial.println("Wakeup caused by external signal using RTC_CNTL"); break;
+    case ESP_SLEEP_WAKEUP_TIMER : Serial.println("Wakeup caused by timer"); break;
+    case ESP_SLEEP_WAKEUP_TOUCHPAD : Serial.println("Wakeup caused by touchpad"); break;
+    case ESP_SLEEP_WAKEUP_ULP : Serial.println("Wakeup caused by ULP program"); break;
+    default : Serial.printf("Wakeup was not caused by deep sleep: %d\n",wakeup_reason); break;
+  }
+}
+
+void setup() {
+  Serial.begin(9600);
+  Serial.setTimeout(500);// Set time out for 
+  setup_wifi();
+  client.setServer(mqtt_server, mqtt_port);
+  client.setCallback(callback);
+  reconnect();
+  Serial.setTimeout(5000);
+
+  //Initialize all pins used.
+  pinMode(player1ButtonPin, INPUT_PULLUP);
+  pinMode(player2ButtonPin, INPUT_PULLUP);
+  pinMode(buttonStart, INPUT_PULLUP);
+  pinMode(ledPin, OUTPUT);
+  pinMode(buzzerPin, OUTPUT);
+}
+
+//function that plays the countdown melody.
+void playMelody() {
+  int melody[] = {  659, 0, 659, 0, 659, 0 }; //plays the first 3 beats of the melody, 0's are pauses.
+  int noteDurations[] = { 400, 400, 400, 400, 400, 400 }; // duration of each note in milliseconds
+
+  // Play the countdown melody
+  for (int i = 0; i < sizeof(melody) / sizeof(melody[0]); i++) {
+    int noteDuration = noteDurations[i];
+    tone(buzzerPin, melody[i], noteDuration);
+
+    // Pause between notes
+    delay(noteDuration + 50); 
+    noTone(buzzerPin); 
+  }
+
+  // pause before playing the final note
+  delay(500);
+
+  // plays the final note
+  tone(buzzerPin, 1000, 500); 
+  delay(700);
+  noTone(buzzerPin);
+}
+
+//function that sets several game variables, turns led on/off and calls the melody function.
+void startGame(){
+
+  if(gameSetup == true){
+
+    digitalWrite(ledPin, HIGH);
+    delay(3000);
+    digitalWrite(ledPin, LOW);
+    delay(2000);
+
+    playMelody();
+    gameStart = true;
+  }
+}
+
+void loop() {
+   client.loop();
+
+    //checks state of start button
+    buttonState2 = digitalRead(buttonStart);
+
+    //if the start button is pressed, the game hasn't been setup already, and the esp32 is connected to the mqtt, enter the statement.
+    if(buttonState2 == LOW && gameSetup == false && isConnected == true){
+      Serial.println("game started");
+      gameSetup = true;
+      startGame();
+
+      //while neither player has pressed their button, the program will continuosly look for a button press.
+      while(winnerFound != true){
+        
+        buttonState = digitalRead(player1ButtonPin);
+        buttonState3 = digitalRead(player2ButtonPin);
+
+        //if player1 pressed their button first
+        if(buttonState == LOW && gameStart == true){
+
+          Serial.println("player1 is the winner!");
+          winnerFound = true;
+          client.publish(MQTT_SERIAL_PUBLISH_CH, "Player1 is the Winner!");
+          goToSleep = true;
+        }
+
+        //if player2 pressed their button first
+        if(buttonState3 == LOW && gameStart == true){
+
+          Serial.println("player2 is the winner!");
+          winnerFound = true;
+          client.publish(MQTT_SERIAL_PUBLISH_CH, "Player2 is the Winner!");
+          goToSleep = true;
+        }
+
+      }
+    }
+
+    if(goToSleep == true && winnerFound == true){
+
+    delay(5000);
+
+    //Print the wakeup reason for ESP32
+    print_wakeup_reason();
+
+    //the esp32 will wakeup after 10 seconds.
+    esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
+
+    //after the sleep the game will restart, allowing it to be replayed.
+    Serial.println("Going to sleep now");
+    Serial.flush(); 
+    esp_deep_sleep_start();
+    }
+}
\ No newline at end of file

test/README

+
+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