Coffee Machine Team # 191 Team Members: Lam Dinh Jesse Garrard - - PowerPoint PPT Presentation

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Mar 31, 2024 102 likes •360 views

Bluetooth Enabled Coffee Machine Team # 191 Team Members: Lam Dinh Jesse Garrard Shayan Rizvi Mevludin Guster Advisor: Marten Van Dijk Sponsor Contact: Michael Daigle Outline iDevices Our Project Keurig Coffee Maker

SLIDE 1

Bluetooth Enabled Coffee Machine

Team # 191

Team Members: Lam Dinh Jesse Garrard Shayan Rizvi Mevludin Guster Advisor: Marten Van Dijk Sponsor Contact: Michael Daigle

SLIDE 2

Outline

iDevices
Our Project
Keurig Coffee Maker
Hardware and Microcontroller
Mechanical Aspect
Android Application

SLIDE 3

iDevices

Founded in 2010
Located in Avon, CT
“Leaders in the development of app-enabled

products and processes”.

Develops app-enabled products both

independently and with partner companies.

SLIDE 4

Our Project

To Bluetooth-enable a coffee machine that

will allow users the convenience of operating the machine from any location in its vicinity.

go.uconn.edu survey
Keurig Coffee Maker

SLIDE 5

Keurig Coffee Maker (B40)

SLIDE 6

Keurig Hardware

Power Conditioning and Fuse Board Main Board: Microcontroller Button Interface Board

SLIDE 7

Approach

Isolate our microcontroller and circuit from the Keurig circuit by using the Relay board to control the interface

SLIDE 8

Main Electrical Components

AVR Microcontroller Atmel 644
Bluetooth Module (RN42)
Solenoid Valves
IR Sensor
BJT Transistors

SLIDE 9

Design Flowchart

App Bluetooth module Relay Solenoid Valve Infrared sensor

SLIDE 10

Sensor

SHARP GP2Y0A41SK0F

sensor has a range of 30cm

Packaged in this sensor

are an infrared LED, a position sensitive detector and a signal processing circuit.

Outputs a voltage

corresponding to a detection distance

SLIDE 11

Schematic

SLIDE 12

Microcontroller Functions

Program timer from AVR Microcontroller so

user can select time to brew coffee

UART serial communication to send and

receive data with the phone via Bluetooth

ADC peripheral is used for water level, and

Infrared sensor

GPIOs control Solenoid, relay board
External interrupt to send signal to the phone

to notify the user that machine is ready to brew

SLIDE 13

Mechanical Approach

Rotating design with

stepper motor

Solenoid design

SLIDE 14

Mechanical Aspect

Choice of 3 K Cups
Solenoid Valves
Silicone Tubing

(previously polypropylene)

Aluminum Structure

(previously Lexan)

SLIDE 15

Solenoid Valves

3 Parker Solenoid

Valves

Normally Closed
12 VDC/8 Watt
External Power

Source

NPN transistor circuit

SLIDE 16

Software

Java
Communication via Bluetooth(API 5)
Minimum Froyo (2.2)(API 8)
Current KitKat(4.4)
Basic Layout
User friendly

SLIDE 17

Android Application

Power
kCup choice
Cup size (8oz, 10oz, 12oz)
Set time to brew
Stop/Cancel Brew
Coffee ready notification
Water level notification
Cup not present notification

SLIDE 18

New Design

SLIDE 19

Connecting to Devices

In-App Connections
Scan for devices
Pair with supported

coffee makers

Connect to device
After connection,

device name shows on top right.

SLIDE 20

Communication with Microcontroller

Successfully send and

receive data over bluetooth

Send data through bytes
Microcontroller sends byte

every second until app receives it and sends back confirmation.

Disables buttons if cup not

present or water level low.

SLIDE 21

Communication

SLIDE 22

When Will This Work Occur?

SLIDE 23

Budget

Prototyping Cost < $700
Final Product Cost < $300
Expenses(so far)

– 2 x $75.49 on Keurig – $22.04 on Stepper Motor – $30 on Bluetooth module (RN42) – $108 Electrical Components (Diodes, relays, AVR..) – $ 15.29 Lexand – $ 60 Additional Keurig Components – $ 70 Parts fabrication – $ 10 Tools – $ 64.47 Tubing and connectors – Total spent thus far: $530.78

Remaining: $169.22

SLIDE 24