needed before anything happens

.gitignore

@@ -0,0 +1,8 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch
+
+src/credentials*
+mcukit/*

include/README

@@ -0,0 +1,39 @@
+
+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

mcukit

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+Subproject commit e06e54c09a925a7a0285504f98919ea78ce149f6

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
+
+[common]
+lib_deps_external = 
+  https://github.com/adafruit/DHT-sensor-library/archive/refs/tags/1.4.3.zip
+  https://github.com/knolleary/pubsubclient/archive/refs/tags/v2.8.zip
+
+
+[env:lolin32]
+platform = espressif32
+board = lolin32
+framework = arduino
+
+upload_speed = 115200
+monitor_speed = 115200
+
+lib_extra_dirs = ./mcukit
+lib_deps = ${common.lib_deps_external}
+
+upload_port = /dev/cu.SLAB_USBtoUART

src/config.h

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+
+// pin configuration
+
+#define PIN_DHT 2
+#define PIN_ATOMIZER 4
+
+#define MQTT_BROKER "YOUR_MQTT_BROKER_IP_ADDRESS"
+

src/main.cpp

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+#include <Arduino.h>
+#include <easywifi.h>
+#include <derfunke.h>
+#include <nanolog.h>
+#include <ugen.h>
+#include <trigger.h>
+#include <PubSubClient.h> // mqtt stuff
+#include <WiFi.h>
+
+#include <Adafruit_Sensor.h>
+#include <DHT.h>
+
+#include "credentials.h"
+#include "config.h"
+
+DHT dht(2, DHT11);
+float h, t, f;
+float hif, hic;
+
+
+USquare duty; // function generator for duty cycle
+Trigger fogOff( &duty, 1.0, ON_ASCENT );
+Trigger fogOn( &duty, 0.0, ON_DESCENT );
+
+WiFiClient espClient;
+PubSubClient client(espClient);
+
+void setup() {
+  Serial.begin(115200);
+  LOG_INIT();
+
+  pinMode(PIN_ATOMIZER, OUTPUT);
+
+  duty.setFrequency(0.05);
+  duty.setAmplitude(0.5);
+  duty.setPhase(0);
+  duty.setYShift(0.5);
+
+  df_header_print();
+
+  if( wifi_connect_as_client(WIFI_SSID, WIFI_PASSWORD) ) {
+    wifi_print_mode();
+    wifi_print_ip();
+  } else {
+    Serial.print("Failed to connect to wifi ");
+    Serial.print( WIFI_SSID );
+    Serial.println();
+    Serial.println("Brace! Brace! trying to continue without wifi...");
+  }
+
+  Serial.println("Initializing mqtt data stream...");
+  client.setServer(MQTT_BROKER, 1883);
+  client.setCallback(callback);
+
+  Serial.println("Initializing DHT sensor...");
+  dht.begin();
+}
+
+void dht_report_reading() {
+  Serial.print(F("Humidity: "));
+  Serial.print(h);
+  Serial.print(F("%  Temperature: "));
+  Serial.print(t);
+  Serial.print(F("°C "));
+  Serial.print(f);
+  Serial.print(F("°F  Heat index: "));
+  Serial.print(hic);
+  Serial.print(F("°C "));
+  Serial.print(hif);
+  Serial.println(F("°F"));
+}
+
+void callback(char* topic, byte* message, unsigned int length) {
+  Serial.print("Message arrived on topic: ");
+  Serial.print(topic);
+  Serial.print(". Message: ");
+  String messageTemp;
+  
+  for (int i = 0; i < length; i++) {
+    Serial.print((char)message[i]);
+    messageTemp += (char)message[i];
+  }
+  Serial.println();
+
+  // // Feel free to add more if statements to control more GPIOs with MQTT
+
+  // // If a message is received on the topic esp32/output, you check if the message is either "on" or "off". 
+  // // Changes the output state according to the message
+  // if (String(topic) == "esp32/output") {
+  //   Serial.print("Changing output to ");
+  //   if(messageTemp == "on"){
+  //     Serial.println("on");
+  //     digitalWrite(ledPin, HIGH);
+  //   }
+  //   else if(messageTemp == "off"){
+  //     Serial.println("off");
+  //     digitalWrite(ledPin, LOW);
+  //   }
+  // }
+}
+
+void reconnect() {
+  // Loop until we're reconnected
+  while (!client.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    // Attempt to connect
+    if (client.connect("kodama")) {
+      Serial.println("connected");
+      // Subscribe
+      client.subscribe("esp32/output");
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(client.state());
+      Serial.println(" try again in 5 seconds");
+      // Wait 5 seconds before retrying
+      delay(5000);
+    }
+  }
+}
+
+// bool dht_read() { //(float &_h, float &_t) {
+//   bool retval = true;
+
+//   // Reading temperature or humidity takes about 250 milliseconds!
+//   // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+//   h = dht.readHumidity();
+//   // Read temperature as Celsius (the default)
+//   t = dht.readTemperature();
+
+//   // Check if any reads failed and exit early (to try again).
+//   if (isnan(h) || isnan(t) ) {
+//     retval = false;
+//   }
+
+//   return retval;
+// }
+
+void atomizer_switch() {
+  digitalWrite(PIN_ATOMIZER, HIGH);
+  delay(300);
+  digitalWrite(PIN_ATOMIZER, LOW);
+}
+
+void loop() {
+
+  // float t = millis() * 0.001;
+  // float v = duty.square(t);
+  // Serial.print(t); Serial.print("@ "); Serial.println(v);
+  
+  // if ( !dht_read() ) { //(h, t) ) {
+  //   LOG("Failed to read from DHT sensor!");
+  //   LOG_NEW_LINE
+  // }
+
+  if( fogOff.bang() ) {
+    Serial.print(t); Serial.println(" >>>>>>>>>> FOG OFF!");
+    atomizer_switch(); 
+  }
+
+  if( fogOn.bang() ) {
+    Serial.print(t); Serial.println(" <<<<<<<<<< FOG ON!"); 
+    atomizer_switch(); 
+  }
+
+  // if(v >= 1) {
+  //   // Reading temperature or humidity takes about 250 milliseconds!
+  //   // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+  //   h = dht.readHumidity();
+  //   // Read temperature as Celsius (the default)
+  //   t = dht.readTemperature();
+
+  //   // Compute heat index in Celsius (isFahreheit = false)
+  //   hic = dht.computeHeatIndex(t, h, false);
+  //   dht_report_reading();
+    
+  //   Serial.print(">> "); Serial.print(v); Serial.println();
+  // }
+
+  delay(50);
+}

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