Real World

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Real World
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GC-100 Network Adapter
3
The IP Connected Home
4
Serial Standards

• RS-232
• Single Ended
• Dist 50ft _at_19.2Kbps
• Point to Point
• ? 115.2Kbps (baud)

• RS-485
• Differential
• Dist 4000ft _at_100Kbps
• Multi Drop (32 point)
• ? 10Mbps

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PC Serial Pins

• Communications
• Rxd, Txd
• Flow control (HW)
• RTS, CTS
• Modem control
• DTR, DSR
• RI, DCD
• Ground

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Serial Connectors

• DTE (male 9 pin)
• 2 Rxd Input
• 3 Txd Output
• 5 Ground
• 7 RTS Output
• 8 CTS Input

• DCE (female 9 pin)
• 2 Rxd Output
• 3 Txd Input
• 5 Ground
• 7 RTS Input
• 8 CTS Output

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Serial Data
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ASCII Chart

• Printable characters
• Easier to debug
• Allows S/W flow control
• Delimiters and characters
• Top 128 is no-mans land

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Where to Start

• Find TxD, RxD and ground pins
• Measure output voltages
• Disable flow control
• Determine baud rate
• Other issues are, parity, data size, and stop
  bits
• Flow control
• Enable and test
• DTE and DCE should be the same as TxD and RxD
• Avoid marginal situations
• Minimize cable length and baud rate

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Serial Considerations

• Unfortunately vendors have taken many liberties
• Pin outs, voltages, speed, and impedances
• Data flow
• Handshaking both H/W and S/W
• Receiver buffer size
• Transmission errors
• Application is reasonable for transmission
  integrity
• Parity is better than nothing, but not by much
• Increased likelihood with cable length
• Vendor specific solutions are available

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How IR works

• Modulated carrier frequency 32 to 460KHz
• For background noise immunity
• Envelop waveforms represent commands
• Command duration is 50 to 100mS

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IR Encoding Formats

• BI phase
• Used by Philips (RC 5)
• or ? in a window
• Pulse distance
• Used by Panasonic
• Time between pulses
• Pulse width
• Used by Sony
• Size of pulse

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IR Considerations

• Toggled states on most IR devices
• Requires sensing power condition
• Higher-end equipment use discrete on/off commands
• No feedback
• Typically IR is sent multiple times for
  reliability
• May require learning IR commands
• Unfortunately vendors do not share IR information
• www.premisesystems.com www.remotecentral.com
• IR may be slow for complex installations

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X-10 Design

• Commands are superimposed on the power line
• Zero crossing synchronizes data bits
• Reduces noise susceptibility

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X-10 Protocol

• Low data rates 60bps
• Susceptible to noise motors, relays
• Serial to X-10 is the common interface

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X-10 Considerations

• Pros
• Wide variety of products
• An excellent way to control high voltage devices
• Great for existing homes no added wiring
• Inexpensive
• Cons
• Poor reputation due to reliability
• Slow communications
• Cons addressed by vendor specific solutions

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Summary

• Networking is in the home to stay
• Easy to wire, but..
• it requires a specific skill set to
  configure, however..
• this will continue to get easier
• uPP will remove much of this complexity
• Its clear, networking will affect your business
• IP networks, the de-facto standard in the home
• Open standard
• Ensures complete transmission integrity
• Embraced by all major vendors

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Proprietary Solutions

• Pros
• Complete solution providers one stop shopping
• Years of experience large installed base
• Established programs trained channel
• One source if problems arise
• Cons
• More expensive
• Lag time to take advantage of new technologies
• Difficult to recruit new trained talent
• Difficult to leverage other vendors equipment

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Open Solutions

• Pros
• Leverage open standards
• Manufacture agnostic best of breed devices
• Easy to recruit talent from IT industry
• Lower cost solutions
• Cons
• NEW with all the problems of being a pioneer
• Incomplete solutions demands experience
• Requires working with multiple vendor products
• May require retraining or recruiting of new talent

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Which Way?

• Both worlds are coming together
• It happened in IT and it will happen here quicker
• Moving to Open Solutions will allow
• Expanding opportunities for increased profits
• Future-proofing your business
• Using the latest COOL toys
• Easier programming with less training
• Whats coming
• Cross discipline solutions
• Smart nodes

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Thank You for Attending

• Request presentation from,
• support_at_globalcache.com
• Related topics
• IP-Based Home Controls The Integrators
  Perspective
• 230PM Today, Room 104A, Session K4
• In case you want MORE!
• IP networking boot camp all day tomorrow 9-5PM,
  Room 104C
• Come see us at booth 646
• Questions and answers