Team The Procaffeinators: Daniel DiPilato, Nicholas Pfeiffer, Joshua Greene

Published November 21, 2016

Brewtiful Bean Machine

If you can't go without your morning coffee, but your routine leaves you crunched for time, then the Brewtiful Bean Machine is for you.

IntermediateShowcase (no instructions)6 hours1,500

Things used in this project

Hardware components

5V 2 channel relay module

A one channel relay will work just fine because a single channel is used in the project.

Particle Photon

DHT11 Temperature & Humidity Sensor (4 pins)

Resistor 10k ohm

Resistor 221 ohm

Extension Cord

Any extension can be used here

Coffee Pot

Any one button coffee maker will work

Software apps and online services

IFTTT Maker service

ThingSpeak API

Story

Introduction

Have you ever woken up late and had to sacrifice that morning coffee due to lost time? If so then we have the answer for you! The Brewtiful Bean Machine, is designed specifically so you can utilize every second of your precious time doing things other then making your coffee. There have been many times where I might hit that snooze button too many times and find myself in the dilemma of taking a shower or brewing coffee. Now I don’t have to choose! When I wake up I simply need to hit a button on my phone and my coffee will automatically start brewing while I take a shower. By the time I get out the coffee is ready and will even send me a text message saying that my coffee is done! The reason we chose to create a remote controlled coffee pot was to ensure that if we were ever running behind we wouldn’t have to worry about waiting for our coffee to brew. We would just touch a button and the coffee would be ready by the time we got downstairs saving us about 5 precious minutes.

Particle Photons

This project utilized two particle photons. One particle (extension cord) was utilized to create a wirelessly controlled extension cord. The particle photon was also connected to a two channel relay. We cut the insulating jacket from a section of the extension cord and connected the hot wires to the relay so that when it was initially connected, the relay channel was open. Using the particle app it was possible to toggle the pin modes between high and low. A function was created called relayToggle which signified when the relay was turned on and off. This on/off function of the relay made it so if the function was off the extension cord would be off, if on the extension cord would also be on.

*(Interesting side note: The particle photons are developed using WiFi connection so as long as your phone is connected to the internet you can control a particle. For example, if you connect our relay circuit to a space heater at work, you could turn it on when you leave the house and by the time you got to work it would be warmed up.)*

Power

This extension cord was then used to power the next photon (Mcbuckets) and the coffee pot. Mcbuckets was wired with one DHT11 temperature and humidity sensor and one photo resistor. The coffee pot we used was an older one button coffee maker. The bottom of the coffee maker was pulled off and Mcbuckets was mounted to the bottom of the coffee pot far enough away so it did not touch the heating coils. Mcbuckets was also connected to ThingSpeak where data was collected in Temp F, Temp C, Humidity, and Light. Graphs were created to log the data collected. One thing we really had to pay close attention to was the upper limit on the DHT11 sensor. According to manufacturer specs, this sensor was rated for up to 50 degrees Celsius or 122 degrees Fahrenheit and inside the coffee maker temperatures were recorded as high as 50 degrees Celsius. This was extremely close to manufacturer limits but we logged the data for over 45 minutes and the highest recorded value was 50 degrees Celsius.

To utilize both particles simultaneously, a connection had to be made. Once extension cord’s relayToggle function was activated the extension cord would switch on. This would activate both the particle Mcbuckets and the coffee maker. Once Mcbuckets was activated it would immediately start logging data which would be sent to ThingSpeak. IFTTT was also connected to Mcbuckets so when a certain temperature was achieved, it would send me a notification informing me the coffee was done brewing. It will continue sending notifications after every loop (about 30 seconds) making it virtually impossible to forget to turn your coffee pot off unless you have misplaced your phone.

Code

// -----------------------------------------
// Function and Variable with Photoresistors
// -----------------------------------------
// In this example, we're going to register a Particle.variable() with the cloud so that we can read brightness levels from the photoresistor.
// We'll also register a Particle.function so that we can turn the LED on and off remotely.

// We're going to start by declaring which pins everything is plugged into.

int relay = D0; // This is where your LED is plugged in. The other side goes to a resistor connected to GND.
int led = D7;



// Next we go into the setup function.

    void setup() {
    
       


    pinMode(relay,OUTPUT);//  our to_relay pin is output (sending voltage to relay)
    pinMode(led,OUTPUT);
    
    digitalWrite(led,LOW);


    // We are also going to declare a Particle.function so that we can turn the LED on and off from the cloud.
    Particle.function("relayToggle",relayToggle);
    // This is saying that when we ask the cloud for the function "on", it will employ the function ledToggle() from this app.
 
        Particle.subscribe("thingSpeakWrite_All","led_ON","3f0041001747343338333633");
                            
}

// Finally, we will write out our ledToggle function, which is referenced by the Particle.function() called "led"
void led_ON(const char *eventName, const char *data)
   {
    digitalWrite(led, HIGH);
    delay(500);
   }
    
int relayToggle(String command) {


        if (command == "ON" || command == "on" || command == "On") {
            digitalWrite(relay, HIGH);
                return 1;
                    
    }
        else if (command == "OFF" || command == "off" || command == "Off") {
            digitalWrite(relay, LOW);
               
                
                return 0;
    }
        else {
            return -1; 
    
    
        }
}

// This #include statement was automatically added by the Particle IDE.
#include "Adafruit_DHT/Adafruit_DHT.h"

// -----------------------------------------
// solarmonitor
// Monitor light, temperature and Humidy at solar panel
// Particle Photon + Particle.io Webhook + ThingSpeak Integration
// April, 2016 - Pete Hoffswell - pete@hoffswell.com
// -----------------------------------------
#define DHTPIN 2
#define DHTTYPE DHT11 // DHT11 Module
#define publish_cycle 10000 // Only publish every 60 seconds
const String key = "YEB3V2FLNZH3Y8QW"; // Change this to your Thingspeak api write key
int led = D7;
int photoCell = A0;
int power = A5; // Photocell power.  An analog pin to gives a more steady voltage.
int light; // Light
double tempF; // Temperature F
double tempC; // Temperature C
double humidity; // Humidity
unsigned int lastPublish = 0;
DHT dht(DHTPIN, DHTTYPE);
void setup() {
    // Set Pin Modes
    pinMode(led,OUTPUT);
    pinMode(photoCell,INPUT);
    pinMode(power,OUTPUT);
    digitalWrite(power,HIGH); // Turn on power source for photoCell
    digitalWrite(led,LOW); 
    // Connect variables to particle cloud
    // This allows you to save data to particle.io, and run commands against it such as "particle variable Photon get light"
    Particle.variable("light", &light, INT);
    Particle.variable("tempF", &tempF, DOUBLE);
    Particle.variable("tempC", &tempC, DOUBLE);
    Particle.variable("humidity", &humidity, DOUBLE);
    dht.begin();
    Serial.begin(9600);
    delay(10000);
} //setup
void loop() {
  unsigned long now = millis();
  digitalWrite(led,HIGH); // Signal read sequence led
  // read sensors
  light = analogRead(photoCell);
  delay(100);  // is this needed?
  humidity = dht.getHumidity();
  tempC = dht.getTempCelcius();
  tempF = dht.getTempFarenheit();
  // DHT Read ok?
  if (isnan(humidity) || isnan(tempF) || isnan(tempC)) {
    Serial.println("");
    Serial.println("Failed to read from DHT sensor!");
    Serial.println("humidity=" + String(humidity) + " tempF=" + String(tempF) + " tempC=" + String(tempC));
    Serial.println("");
    return; // exit loop and try again
  }
  // Display to serial
  Serial.println();
  Serial.print("humidity=" + String(humidity) + " tempF=" + String(tempF) + " tempC=" + String(tempC) + " light=" + String(light));
  delay(200);
  // Publish to thinkspeak
  if ((now - lastPublish) > publish_cycle) {
    Particle.publish("thingSpeakWrite_All", "{\"1\": \"" + String(humidity) + "\"," +
       "\"2\": \"" + String(tempC) + "\"," +
       "\"3\": \"" + String(tempF) + "\"," +
       "\"4\": \"" + String(light) + "\"," +
       "\"k\": \"" + key + "\"}", 60, PRIVATE);
    lastPublish = now;
    Serial.println(" - Published!");
  } else {
      Serial.println();
  }
 digitalWrite(led,LOW);
  delay(2000); // Wait 2 seconds before next loop
}// loop

{
  "event": "thingSpeakWrite_",
    "url": "https://api.thingspeak.com/update",
    "requestType": "POST",
    "form": {
        "api_key": "{{k}}",
        "field1": "{{1}}",
        "field2": "{{2}}",
        "field3": "{{3}}",
        "field4": "{{4}}",
        "field5": "{{5}}",
        "field6": "{{6}}",
        "field7": "{{7}}",
        "field8": "{{8}}",
        "lat": "{{a}}",
        "long": "{{o}}",
        "elevation": "{{e}}",
        "status": "{{s}}"
    },
    "mydevices": true,
    "noDefaults": true
}

Brewtiful Bean Machine

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Particle Photons

Power

Schematics

Relay Switch Circuit

Temperature Sensor Circuit

Temperature Schematic

Relay Schematic

Thingspeak DHT11 Sensor Data

Code

Relay Switch Code

Temperature Sensor Code

Integration

Credits

Daniel DiPilato

Nicholas Pfeiffer

Joshua Greene

Comments

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Brewtiful Bean Machine

Brewtiful Bean Machine

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Particle Photons

Power

Schematics

Relay Switch Circuit

Temperature Sensor Circuit

Temperature Schematic

Relay Schematic

Thingspeak DHT11 Sensor Data

Code

Relay Switch Code

Temperature Sensor Code

Integration

Credits

Daniel DiPilato

Nicholas Pfeiffer

Joshua Greene

Comments

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