UI Code

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

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:d1_mini]
+platform = espressif8266
+board = d1_mini
+framework = arduino
+upload_port = COM3
+monitor_speed = 115200
+lib_deps =
+	olikraus/U8g2@^2.34.18
+	links2004/WebSockets@^2.4.1
+	tzapu/WiFiManager@^0.16.0

src/config.h

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+#ifndef _CONFIG
+#define _CONFIG
+
+#define AP_NAME "Dragon Capsule is best capsule"
+#define ENABLE_SERIAL true
+
+#endif

src/main.cpp

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+// Base Platform Libraries
+#include <Arduino.h>
+#include <Hash.h>
+
+// Display Libraries
+#include <U8g2lib.h>
+#include <SPI.h>
+#include <Wire.h>
+
+// Wireless Libraries
+#include <DNSServer.h>
+#include <ESP8266WebServer.h>
+#include <WiFiManager.h>
+
+// Config
+#include "config.h"
+
+U8G2_SSD1309_128X64_NONAME2_1_4W_HW_SPI disp(U8G2_R0, /* cs=*/ 15, /* dc=*/ 2, /* reset=*/ 16);
+double progress = 0;
+
+// TODO:
+// 1. Add WPA2 and connect QR to display
+//  "WIFI:S:"+ssid+";T:WPA;P:"+pass+";;"
+
+void statusMsg(String msg){
+  disp.firstPage();
+  do {
+    disp.drawUTF8(110, 1, msg.c_str());
+  }while ( disp.nextPage() );
+}
+
+void configModeCallback (WiFiManager *myWiFiManager) {
+  Serial.println("Entered config mode");
+  statusMsg("Setup");
+  Serial.println(WiFi.softAPIP());
+  // print the ssid that we should connect to to configure the ESP8266
+  Serial.print("Created config portal AP ");
+  Serial.println(myWiFiManager->getConfigPortalSSID());
+}
+
+void drawUI(){
+  disp.drawFrame(2,2,124,20);
+  disp.setFont(u8g2_font_6x12_mf);
+  disp.drawUTF8(100, 57, "%");
+}
+
+void drawTime(int xOffset, String label, uint64 time){
+  disp.setFont(u8g2_font_simple1_tf);
+  disp.drawUTF8(xOffset, 25, label.c_str());
+  disp.setFont(u8g2_font_4x6_tf);
+  uint64 hours = time / 3600;
+  uint64 minutes = (time % 3600) / 60;
+  uint64 seconds = (time % 3600) % 60;
+  String timeStr = "";
+  if (hours < 10){
+    timeStr += "0";
+  }
+  timeStr += String(hours);
+  timeStr += ":";
+  if (minutes < 10){
+    timeStr += "0";
+  }
+  timeStr += String(minutes);
+  timeStr += ":";
+  if (seconds < 10){
+    timeStr += "0";
+  }
+  timeStr += String(seconds);
+  disp.drawUTF8(xOffset-10, 25, timeStr.c_str());
+}
+
+void drawTemp(int xOffset, String label, int temperature){
+  disp.setFont(u8g2_font_tom_thumb_4x6_t_all);
+  disp.drawUTF8(xOffset, 25, label.c_str());
+  disp.setFont(u8g2_font_luRS08_tf);
+  String temperatureString = "";
+  if (temperature < 100 && temperature >= 10){
+    temperatureString += "0";
+  }else if(temperature < 10){
+    temperatureString += "00";
+  }
+  temperatureString += String(temperature);
+  temperatureString += " C";
+  disp.drawUTF8(xOffset-10, 25, temperatureString.c_str());
+}
+
+void drawProgress(){
+  // Progress Bar
+  int mappedProgress = map(progress, 0, 100, 0, 124);
+  disp.drawBox(2, 2, mappedProgress, 20);
+
+  // Percentage Label
+  disp.setFont(u8g2_font_profont29_mf);
+  String progressStr = (((int)progress < 10)?"0":"")+String((int)progress);
+  disp.drawUTF8(100, 25, progressStr.c_str());
+
+  // Hotend Temperature
+  int temperature = (int)(progress*10); // TODO: Replace with actual temperature
+  drawTemp(90, "Hotend", temperature);
+
+  // Build Plate Temperature
+  drawTemp(70, "Bed", temperature);
+
+  // Time Elapsed
+  drawTime(40, "Elapsed", progress*10); // TODO: Replace with actual time
+
+  // Time Remaining
+  drawTime(20, "Left", progress*10); // TODO: Replace with actual time
+}
+
+void setup(void) {
+  // Initialize Serial
+  Serial.begin(115200);
+
+  // Initialize Display
+  disp.begin();
+  // disp.setDisplayRotation(U8G2_R1); // Half of the display is broken with this
+  disp.setFont(u8g2_font_6x10_tf);
+  disp.setFontDirection(1);
+  // Serial.println(disp.getDisplayWidth());
+  statusMsg("Connecting");
+
+
+  // Initialilze Wireless
+  WiFiManager wifiManager;
+  wifiManager.setAPCallback(configModeCallback);
+  wifiManager.setTimeout(180);
+  if(!wifiManager.autoConnect(AP_NAME)) {
+    Serial.println("failed to connect and hit timeout");
+    //reset and try again, or maybe put it to deep sleep
+    ESP.reset();
+    delay(1000);
+  }
+  //if you get here you have connected to the WiFi
+  Serial.println("connected to " + WiFi.SSID() + " : " + WiFi.localIP().toString());
+}
+
+
+void loop(void) {
+
+  disp.firstPage();
+  do {
+    disp.setDrawColor(1);
+    drawUI();
+    drawProgress();
+  }while ( disp.nextPage() );
+
+  // TODO: Replace this with data fetch
+  progress += 0.1;
+  if(progress > 100){
+    progress = 0;
+  }
+
+  delay(150);
+}

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