Initial commit

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

.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:esp32dev]
+platform = espressif32
+board = nodemcu-32s
+framework = arduino
+lib_deps = 
+	knolleary/PubSubClient@^2.8
+	bblanchon/ArduinoJson@^6.18.0
+	fastled/FastLED@^3.4.0

src/main.cpp

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+#include <Arduino.h>
+#include <WiFi.h>
+#include <PubSubClient.h>
+#include <ArduinoJson.h>
+#include <FastLED.h>
+#include <SPI.h>
+#include <SD.h>
+
+char* config_filename = "/config.txt";
+
+struct wifi_config_struct
+{
+  char ssid[32];
+  char password[16];
+  char ip[16];
+  char mask[16];
+  char gateway[16];
+  char dns1[16];
+  char dns2[16];
+};
+
+wifi_config_struct wifi_config;
+
+
+// Load configuration file from SD card
+void loadconfig(const char* filename) {
+  Serial.println(F("Loading configuration file."));
+  File file = SD.open(filename);
+
+  StaticJsonDocument<512> jsonBuffer;
+
+  DeserializationError error = deserializeJson(jsonBuffer, file);
+  if (error) {
+    Serial.print(F("Unable to deserialize JSON config file."));
+    Serial.println(error.f_str());
+  } else {
+      strcpy(wifi_config.ssid, jsonBuffer["wifi"]["ssid"] | "defualtSSID");
+      strcpy(wifi_config.password, jsonBuffer["wifi"]["password"] | "");
+      strcpy(wifi_config.ip, jsonBuffer["wifi"]["ip"] | "");
+      strcpy(wifi_config.mask, jsonBuffer["wifi"]["mask"] | "");
+      strcpy(wifi_config.gateway, jsonBuffer["wifi"]["gateway"] | "");
+      strcpy(wifi_config.dns1, jsonBuffer["wifi"]["dns1"] | "");
+      strcpy(wifi_config.dns2, jsonBuffer["wifi"]["dns2"] | "");
+  }
+
+  file.close();
+
+}
+
+// Setup for addressable RGB LED's
+#define num_leds 9
+#define data_pin 4
+
+CRGB leds[num_leds];
+
+//Initialize WiFi Function
+void initWiFi() {
+
+  // Set Static IP address
+  IPAddress local_IP;
+  local_IP.fromString(wifi_config.ip);
+
+  // Set Gateway IP address
+  IPAddress gateway;
+  gateway.fromString(wifi_config.gateway);
+  IPAddress subnet;
+  subnet.fromString(wifi_config.mask);
+  IPAddress primaryDNS;   // optional
+  primaryDNS.fromString(wifi_config.dns1);
+  IPAddress secondaryDNS; // optional
+  secondaryDNS.fromString(wifi_config.dns2);
+  
+  // Configures static IP address
+  if (!WiFi.config(local_IP, gateway, subnet, primaryDNS, secondaryDNS)) {
+    Serial.println(F("STA Failed to configure"));
+  }
+
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(wifi_config.ssid, wifi_config.password);
+  Serial.print(F("Connecting to WiFi .."));
+  while (WiFi.status() != WL_CONNECTED) {
+    Serial.print('.');
+    delay(1000);
+  }
+  Serial.println();
+  Serial.print(F("IP Address: "));
+  Serial.println(WiFi.localIP());
+}
+
+// Variable for Power Usage
+char mqtt_topic[64] = "";
+float mqtt_payload_value = 0;
+
+void printBuffers() {
+  Serial.print("MQTT_Topic: ");
+  Serial.println(mqtt_topic);
+  Serial.print("Value: ");
+  Serial.println(mqtt_payload_value);
+}
+
+// Callback to process MQTT payload
+void callback(char* topic, byte* payload, unsigned int length) {
+  Serial.print("Message arrived!");
+
+  StaticJsonDocument<64> doc;
+  DeserializationError error = deserializeJson(doc, payload, length);
+  if (error) {
+    Serial.print(F("deserializeJson() failed: "));
+    Serial.println(error.f_str());
+    return;
+  } else {
+      mqtt_payload_value = doc["value"];
+      Serial.println(mqtt_payload_value);
+      strcpy(mqtt_topic, topic);
+  }
+  printBuffers();
+}
+
+//Configure MQTT
+WiFiClient wifi_client;
+IPAddress mqtt_server(192, 168, 1, 10);
+PubSubClient mqtt_client(mqtt_server, 1883, callback, wifi_client);
+
+// Connect to MQTT Server and subscrib to topics
+void reconnect_mqtt() {
+  while (!mqtt_client.connected()) {
+    Serial.println(F("Attempting MQTT connection"));
+    if (mqtt_client.connect("ESP32")) {
+      Serial.println("MQTT Connected!");
+      mqtt_client.subscribe("zwave/nodeID_7/50/0/value/66049");
+    } else {
+      Serial.println(F("MQTT Connection Failed. Trying again."));
+      delay(250);
+    }
+  }
+}
+
+void setup() {
+  // Configure Serial
+  Serial.begin(9600);
+
+  delay(1000);
+
+  //Initialize SD card. Pin 5 is slave select for SD card
+  Serial.println(F("Initializing SD card"));
+  if (!SD.begin(5)) {
+    Serial.println(F("Initialization failed!"));
+    while (1);
+  }
+  Serial.println(F("SD card Initialization success!"));
+
+  loadconfig(config_filename);
+
+  SD.end();
+
+  // Setup LED's
+  FastLED.addLeds<NEOPIXEL, data_pin>(leds, num_leds);
+
+  // Configure Pins
+  pinMode(2, OUTPUT);
+
+  // Connect to WiFi
+  initWiFi();
+
+  //Connect to MQTT Server
+  if (!mqtt_client.connected()) {
+    reconnect_mqtt();
+  }
+
+  // Create initial LED Pattern
+  for (int i = 0; i < sizeof(leds); i++) {
+    int mod = i % 7;
+    if ( mod == 0) {
+      leds[i] = CRGB::Red;
+    } else if (i == 1) {
+      leds[i] = CRGB::Orange;
+    } else if (i == 2) {
+      leds[i] = CRGB::Yellow;
+    } else if (i == 3) {
+      leds[i] = CRGB::Green;
+    } else if (i == 4) {
+      leds[i] = CRGB::Blue;
+    } else if (i == 5) {
+      leds[i] = CRGB::Indigo;
+    } else if (i == 6) {
+      leds[i] = CRGB::Violet;
+    }
+  }
+  FastLED.show();
+}
+
+void ESP_LED_flash() {
+
+  static boolean LED_flag = true;
+  static unsigned long LED_timer = millis();
+
+  // Change LED state every 250ms
+  if (millis() - LED_timer >= 250) {
+    LED_timer = millis();
+    if (LED_flag) {
+      digitalWrite(2, HIGH);
+    } else {
+      digitalWrite(2, LOW);
+    }
+    LED_flag = !LED_flag;
+  }
+}
+
+
+
+void loop() {
+
+  static unsigned int initial_hue = 0;
+  const unsigned int hue_diff = 12;
+
+  ESP_LED_flash();
+
+  static unsigned long fastled_timer = millis();
+
+  if (millis() - fastled_timer >= 20) {
+    fastled_timer = millis();
+    fill_rainbow(leds, num_leds, initial_hue, hue_diff);
+    initial_hue += hue_diff;
+    Serial.println("Updating LED Strip");
+    FastLED.show();
+  }
+ 
+  //Connect to MQTT Server
+  if (!mqtt_client.connected()) {
+    reconnect_mqtt();
+  }
+
+  // Process MQTT packets
+  mqtt_client.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