Automatic Addison

/**The MIT License (MIT)

Copyright (c) 2015 by Daniel Eichhorn

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

See more at http://blog.squix.ch
// Modified by Addison Sears-Collins
*/

#include <ESP8266WiFi.h>
#include <DHT.h>


/***************************
 * Begin Settings
 **************************/


const char* ssid     = "xxxx";
const char* password = "xxxx";

const char* host = "api.thingspeak.com";

const char* THINGSPEAK_API_KEY = "xxxx";

// DHT Settings
#define DHTPIN D6     // what digital pin we're connected to. If you are not using NodeMCU change D6 to real pin


// Uncomment whatever type you're using!
#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

const boolean IS_METRIC = true;

// Update every 30 seconds. Min with Thingspeak is ~20 seconds
const int UPDATE_INTERVAL_SECONDS = 60;

/***************************
 * End Settings
 **************************/
 
// Initialize the temperature/ humidity sensor
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  delay(10);

  // We start by connecting to a WiFi network

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {      
    Serial.print("connecting to ");
    Serial.println(host);
    
    // Use WiFiClient class to create TCP connections
    WiFiClient client;
    const int httpPort = 80;
    if (!client.connect(host, httpPort)) {
      Serial.println("connection failed");
      return;
    }

    // read values from the sensor
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature(!IS_METRIC);
    
    // We now create a URI for the request
    String url = "/update?api_key=";
    url += THINGSPEAK_API_KEY;
    url += "&field1=";
    url += String(temperature);
    url += "&field2=";
    url += String(humidity);
    
    Serial.print("Requesting URL: ");
    Serial.println(url);
    
    // This will send the request to the server
    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
                 "Host: " + host + "\r\n" + 
                 "Connection: close\r\n\r\n");
    delay(10);
    while(!client.available()){
      delay(100);
      Serial.print(".");
    }
    // Read all the lines of the reply from server and print them to Serial
    while(client.available()){
      String line = client.readStringUntil('\r');
      Serial.print(line);
    }
    
    Serial.println();
    Serial.println("closing connection");


  // Go back to sleep. If your sensor is battery powered you might
  // want to use deep sleep here
  delay(1000 * UPDATE_INTERVAL_SECONDS);
}

/**
 * In this program, we develop an Arduino-Based Optical Tachometer 
 * that measures the speed of a brushless propeller.
 * 
 * The Infrared LED is connected to pin 13.
 * The Infrared Phototransistor is connected to pin 2 (interrupts).
 * 
 * @version 1.0 2019-02-18
 * @author Addison Sears-Collins
 */
 
// Assign a name to the DC motor pin on the Arduino Uno
const unsigned int MOTOR_PIN = 3;

// Assign a name to the infrared LED pin on the Arduino Uno
const unsigned int IR_LED = 13;

// The number of blades on the propeller. Adjust accordingly.
const unsigned int BLADE_COUNT = 3;

// Volatile keyword is used with interrupts
// This variable is subject to change inside an interrupt
// service routine
volatile unsigned int break_number = 0;

// Flag used to stop the program
bool done = false;

// Used for capturing the time
unsigned long time;

// Used for capturing the rpm (revolutions per minute)
unsigned int rpm;

/**
 *  Function runs only once, after each powerup or reset of the Arduino Uno
 */
void setup() {

  // Open the serial port and set the data transmission rate to 9600 bits 
  // per second. 9600 is the default baud rate for Arduino Uno.
  Serial.begin(9600);

  // Show a welcome message as human-readable ASCII text
  Serial.println("PROPELLER RPM PROGRAM");
  Serial.println("This program transmits the time and RPM of a propeller.");
  Serial.println("Created by Addison Sears-Collins");
  Serial.println("");
  Serial.println("Press ! to end the program");
  Serial.println("");
  Serial.println("Please enter the desired speed of the motor.");
  Serial.println("Must be a value between 100 and 255.");
  Serial.println("");
  Serial.println("TIME, RPM");

  // The Infrared phototransistor is connected to pin 2.
  // Interrupt triggers when signal goes from HIGH to LOW
  attachInterrupt(digitalPinToInterrupt(2), isr_break_count, FALLING); 

  // Turn on the IR Led
  pinMode(IR_LED, OUTPUT);
  digitalWrite(IR_LED, HIGH);

  // Enable output for the motor
  pinMode(MOTOR_PIN, OUTPUT);

  break_number = 0;
  rpm = 0;  
 
}

/**
 *  Main function
 */
void loop() {

  display_time_and_rpm();
  
  start_motor();

  while(!done) {    

    // Update time and rpm every second
    delay(1000);

    // Don't process interrupts during this calculation
    noInterrupts();

    // Calculate the RPM. If a 3-blade propeller, 3 breaks
    // per second would yield 1 rpm, which is 60 rpm. 
    rpm = (60 * break_number) / BLADE_COUNT;

    // Display the time and rpm
    display_time_and_rpm();

    // End program if sentinel is entered 
    end_program();    
    
    break_number = 0;
    rpm = 0;

    // Restart interrupts
    interrupts();
  }
  
  // Do nothing
  while (true) {}
}

/**
  * This function starts the motor
  */
void start_motor() {

  // Wait for the user to enter the speed of the motor
  while (Serial.available() == 0){};

  // Activate the motor
  int speed = Serial.parseInt();
  if (speed >= 100 && speed <= 255) {
    analogWrite(MOTOR_PIN, speed);
  }
}

/**
  * Interrupt service routine.
  * This function counts the number of interrupts
  */
void isr_break_count() {

  break_number++;
  
}

/**
  * Function displays the time and rpm
  */
void display_time_and_rpm() {
  
  // Capture the time and covert to seconds
  time = millis() / 1000;

  // Display the time
  Serial.print(time); 
  Serial.print(" , ");
  // Println so the next line begins on a new line
  // Display the rpm
  Serial.println(rpm);   
}

/**
  * This function ends the program
  */
void end_program() {
  
  // Used for reading data from the serial monitor
  char ch;

  // Check to see if ! is available to be read
  if (Serial.available()) {     
  
    // Read the character
    // Serial.read() returns the first (oldest) character in the buffer 
    // and removes that byte of data from the buffer
    ch = Serial.read();    

    // End the program if an exclamation point is entered in the
    // serial monitor
    if (ch == '!') {
      done = true;  

      // Turn off the motor
      analogWrite(MOTOR_PIN, 0);

      // Turn off the IR LED
      digitalWrite(IR_LED, LOW);
      
      Serial.println("Finished recording RPM. Goodbye.");
    }
  }    
}