Published October 18, 2016 © MIT

Coffee

A Keurig coffee maker controlled by a Node Lua ESP 8266 , Cayenne myDevices, Arduino Pro Mini and a stepper motor with driver.

IntermediateFull instructions provided1 hour6,040

Things used in this project

Hardware components

SparkFun Arduino Pro Mini 328 - 3.3V/8MHz

NodeMCU ESP8266 Breakout Board

stepper motor with driver

Software apps and online services

myDevices Cayenne

Hand tools and fabrication machines

screwdriver

Story

In essence, a hot cup of coffee made at 7:00 each morning.

Use self taping screws to attach your stepper motor.

Use super glue and a popcicle stick to extend the stepper motor shaft. (I used a piece of a broken propeller).

#define IN1  5
#define IN2  6
#define IN3  10
#define IN4  11
int Steps = 0;
boolean Direction = true;// gre
unsigned long last_time;
unsigned long currentMillis ;
int steps_left=4095;
long time;
const byte IOTpressed = 1;

// Interrupt Service Routine (ISR)
void switchPressed ()
{
 if (IOTpressed==HIGH){
    while(steps_left>0){
  currentMillis = micros();
  if(currentMillis-last_time>=1000){
  press(1); 
  time=time+micros()-last_time;
  last_time=micros();
  steps_left--;
   }
  }
  Direction=!Direction;
  steps_left=4095;
}
else {
 IOTpressed==LOW;
 }
}


void setup ()
{
  pinMode(IN1, OUTPUT); 
  pinMode(IN2, OUTPUT); 
   pinMode(IN3, OUTPUT); 
    pinMode(IN4, OUTPUT); 
 pinMode(IOTpressed, INPUT);
  attachInterrupt (0, switchPressed, CHANGE);  // attach interrupt handler
}  // end of setup

void loop ()
{
  // loop doing nothing 
} 
void press(int xw){
  for (int x=0;x<xw;x++){
switch(Steps){
   case 0:
     digitalWrite(IN1, LOW); 
     digitalWrite(IN2, LOW);
     digitalWrite(IN3, LOW);
     digitalWrite(IN4, HIGH);
   break; 
   case 1:
     digitalWrite(IN1, LOW); 
     digitalWrite(IN2, LOW);
     digitalWrite(IN3, HIGH);
     digitalWrite(IN4, HIGH);
   break; 
   case 2:
     digitalWrite(IN1, LOW); 
     digitalWrite(IN2, LOW);
     digitalWrite(IN3, HIGH);
     digitalWrite(IN4, LOW);
   break; 
   case 3:
     digitalWrite(IN1, LOW); 
     digitalWrite(IN2, HIGH);
     digitalWrite(IN3, HIGH);
     digitalWrite(IN4, LOW);
   break; 
   case 4:
     digitalWrite(IN1, LOW); 
     digitalWrite(IN2, HIGH);
     digitalWrite(IN3, LOW);
     digitalWrite(IN4, LOW);
   break; 
   case 5:
     digitalWrite(IN1, HIGH); 
     digitalWrite(IN2, HIGH);
     digitalWrite(IN3, LOW);
     digitalWrite(IN4, LOW);
   break; 
     case 6:
     digitalWrite(IN1, HIGH); 
     digitalWrite(IN2, LOW);
     digitalWrite(IN3, LOW);
     digitalWrite(IN4, LOW);
   break; 
   case 7:
     digitalWrite(IN1, HIGH); 
     digitalWrite(IN2, LOW);
     digitalWrite(IN3, LOW);
     digitalWrite(IN4, HIGH);
   break; 
   default:
     digitalWrite(IN1, LOW); 
     digitalWrite(IN2, LOW);
     digitalWrite(IN3, LOW);
     digitalWrite(IN4, LOW);
   break; 
}
SetDirection();
}
} 
void SetDirection(){
if(Direction==1){ Steps++;}
if(Direction==0){ Steps--; }
if(Steps>7){Steps=0;}
if(Steps<0){Steps=7; }
}

#define CAYENNE_DEBUG         // Uncomment to show debug messages
#define CAYENNE_PRINT Serial  // Comment this out to disable prints and save space
#include <CayenneDefines.h>
#include <BlynkSimpleEsp8266.h>
#include <CayenneWifiClient.h>
#include <Arduino.h>
#include <SoftwareSerial.h>
// Cayenne authentication token. This should be obtained from the Cayenne Dashboard.
char token[] = ""; //device code
char ssid[] = ""; //your ssid
char password[] = ""; // network password
void setup()
{
  Serial.begin(9600);
  Cayenne.begin(token, ssid, password);
}
void loop()
{
  Cayenne.run(); 
}