Curt Priest CIST 1451 April 21, 2014 Enabling remote access and control from anywhere PIC18F97J60 Based Ethernet Controller

 Project milestones  Mapping Software / hardware  ICSP interface  Compile / install firmware  1 wire communication protocol  HTML / AJAX / JAVA / CGI  Conclusion  Why I chose this project  What I learned  What would I do different  What next?  Project description  Create a platform that enables internet access and control to home appliances such as HVAC systems.  Dynamic monitoring  Increased security and protection  Project methodology  Use Ethernet enabled PIC  Create voltage isolation  Use Microchip TCP/IP stack Overview

Project Description

 Use Ethernet enable Pic Micro  Develop safe voltage isolation  Use Microchip’s TCP/IP stack  Modify and compile / program firmware and software Procedure / Methodology

Physical Hardware  Demonstration board  Pic programmer  USB to Serial conversion cable  USB power / communication cable

Voltage Isolation  Need to separate High voltage AC from Low logic circuit and user interface  Household currents susceptible to powerful surges.  Inductive loads create ‘kick-back’ voltages

TCP / IP stack  Fully customizable  Free usage license Application Transport Internet Host-To-Network

Project Considerations  Why Target HVAC system  monitoring  voltage differential  inductive  Bare bones chip or Demo board  Design efficiency / esthetics  Genuine or aftermarket  Physical cost  Documentation  reliability

 Mapping of hardware to software  Build interface connections ICSP (in circuit serial program)  Successful compile and install of firmware Milestones

 Creation of 1 wire communication protocol for DS1820  HTML / AJAX / JAVA / CGI  Network Port forwarding for out of network access Milestones Cont.

 Why I chose this project  Low level electronics basics  Hardware interfacing  Complex microprocessor design  Protocol development  What I learned  Demo board added complexity  TCP/IP stack very customizable but very complex  Many programming technologies combined to create flexibility.  Project platform will continue to provide training for several technologies. Conclusion

 What would I have done different  Choice of aftermarket board added complexity  Better research: could have been costly  Complexity would slowed down progress  What is next.  Project platform will continue to provide training for several technologies. Conclusion Cont.

Thank you for your time. Questions & Discussion