Designing a Microcontroller Integrated with WiFi and a Mobile - - PowerPoint PPT Presentation

Designing a Microcontroller Integrated with WiFi and a Mobile Application for a Pellet Smoker

Course: ECE 4901, 2017-2018 Members: Adam Burns

• EE

Jason DeJesus

• EE/CompE

Trevor Svec

• CompE

Sponsoring Company: Seconn Fabrication, LLC Jason Pflomm, Engineering (860) 443-0000 jasonp@seconn.com

Seconn Fabrication

• Manufacturing group based

in southern New England

• Precision sheet metal
• Robotics
• Automation
• Daughter company

○ Myron Mixon Smokers

Adam Trevor Jason

Myron Mixon

Summary

• The existing microcontroller has reduced functionality and is

limited in scope

• Delivering a new microcontroller that exceeds the capabilities of

the current microcontroller in use

• We intend to reverse engineer the major components of the old

microcontroller to provide us with a path for designing and implementing a new microcontroller

• The next major goal will be to implement a mobile application in

use with integrated WiFi/Bluetooth protocols

Background Existing Microcontroller - PIC16F882

• Digital Thermostat Kit by Ortech
• Cost to Purchase = $45
• Three Digit Temperature Display
• Front Panel Cook Control
• Eight Cook Temperature Settings - 180 ° - 375 ° F
• Sixteen Smoke Settings for Smoke Control
• Cool Down Cycle
• Several Sensor Indicators

Problem

• One of the main obstacles with the existing design is lack of WiFi

and mobile application compatibility

• Currently no module on the existing microcontroller to serve

these functions

• Poor feedback loops for retaining heat on smoker
• Market demand for extended cooking and smoking functionality

Microcontroller

Microcontroller Cost CPU Memory Video Wireless Raspberry Pi 3 Model B $35 1.2 GHz 64-bit Quad Core microSD Card HDMI / LCD WiFi / Bluetooth Onboard Arduino Uno R3 $28 16 MHz crystal Internal Flash Memory

• f 32 KB

LCD WiFi / Bluetooth Offboard Beaglebone Rev C $67 1 GHz 4 GB eMMC HDMI / LCD WiFi / Bluetooth Offboard

WiFi Offboard Device

• ESP8266 NodeMCU
• $9
• Built-in Micro-USB
• Wireless 802.11 Supported
• Arduino Compatible
• Serial Module

LCD Screens

LCD Screen Cost Size Touch Interface

OSOYOO Touch Screen LCD

$30 3.5” up to 1920*1280 Yes HDMI

Basic 16x2 Character LCD

$15 16x2 Characters No 11 Pin IO

LCD Screens

OSOYOO Touch Screen LCD

LCD Screens

Basic 16x2 Character LCD

Wireless Protocols

WiFi:

• 802.11a/b/g
• Frequency Band: 2.4 GHz
• Nominal Range: 100 m
• Channel Bandwidth: 22 MHz
• Max Signal Rate: 54 Mb/s

Wireless Protocols

Bluetooth:

• 802.15.1
• Frequency Band: 2.4 GHz
• Nominal Range: 10 m
• Channel Bandwidth: 1 MHz
• Max Signal Rate 1 Mb/s

Wireless Configurations

Direct Access - Bluetooth or WiFi Indirect Access - WiFi

Budget

• Final product includes:

○ Digital Microcontroller w/ WiFi ○ Power Board ○ Display ○ App

• should be no more than

$100-$150

• Prototype can be more
• Price not including power

components from existing controller

Track 1 Track 2 Track 3 Raspberry Pi 3 Model B

• $35

Arduino Uno R3 - $28 Raspberry Pi 3 Model B - $35

OSOYOO Touch Screen LCD - $30 Basic 16x2 Character LCD

• $10

Basic 16x2 Character LCD - $10 Onboard WiFi/Bluetooth Offboard WiFi - ESP8266

NodeMCU - $9

Onboard WiFi/Bluetooth Total = $65 Total = $47 Total : $45

Solution

• Redesign the microcontroller by programming existing mainstream

microcontroller (raspberry pi, arduino, etc)

• Use the digital IO from a microcontroller with a development board to

control all the power components on the existing microcontroller

• Utilize WiFi on the new microcontroller to interface with a mobile

application

• We would keep redesigning the power components to a bare

minimum in order to use the mainstream microcontroller as the main controller.

Project phases, timing, milestones - 1st Semester

September

• Contact/Meet with Advisor and Sponsor

○ Speak about scope of project

• Set up regular meetings and meeting times
• Project Statement

October

• Weekly meetings with Advisor / Sponsor begin
• Set project expectations

○ Economic, time, and manpower constraints

• Research existing micro-controllers / micro-controller components

November

• Creation of week by week timeline
• Project Proposal Due
• Purchase Prototyping Materials
• Receive grill(s)

December

• Test integration of new microcontroller in system

Project phases, timing, milestones - 2nd Semester

January

• Re-examine timeline and adjust accordingly
• Major follow up with sponsor regarding progress and goals

February

• Demonstrate functionality of new microcontroller system

○ Should be on par with previous system

• Begin App Prototyping

March

• Design and implement enhanced functionality

○ WiFi, LCD screen, Recipes

April

• Demonstrate ability to cook different recipes effectively

Questions?

Comments?