DIY Wireless Sensor Networks
18 Nov 2013, 9:00am, Dreamforce
Reid Carlberg, Salesforce.com, Director - Evangelism
@ReidCar...
Safe harbor
Safe harbor statement under the Private Securities Litigation Reform Act of 1995:
This presentation may contai...
We’re Building a Wireless Sensor Network

REST API
XBee
Streaming API
Node JS

http://github.com/ReidCarlberg/DF13_Wireles...
Hands on making is the best way to learn
connected device app development.
Arduino – Open Source Prototyping Board.
ATmega328 Controller
32k of RAM
Easy to program (~C++)
No SSL.
Arduino Classes he...
XBee
Cheap, easy
Serial communication
Self configuring
Stop by the Etherios table to learn more!
Raspberry Pi
Single board computer
Education focused
Runs Linux/Python/Node
Network Aware
SSL Capable
Salesforce Platform
APIs make it dead easy
Free developer edition
We all know how to use it
Bill Of Materials
Arduino Experimenter’s Kit: $85
Arduino XBee Shield: $25

XBee Pro Series 1 (2): $76
Raspberry Pi Starte...
Breadboards
+/- conduct up and down.
#’s conduct side to side
A,b,c,d,e, etc don’t matter
Voltage goes to + (red)
Ground g...
Wires
Red or Orange – Positive
Black or Green – Negative
Otherwise doesn’t matter
Polarity Sometimes Matters
Positive is voltage in.
Negative is voltage out.
Matters on: LED, TMP36

Doesn’t matter on: RES...
Know Your Voltage
3.3V or 5.0V
Everything today is 5.0V
safe.
**Connect to 5V
Get Everything Out
It’s in a bag on top.
You can dig through the
explorer kit later.
Assemble the Shield
Stack the wireless shield
on top of the Arduino.
Be careful not to bend any
pins!
Add the XBee
Don’t force it.
Make sure all the pins are
in.
Add Components to Breadboard
LED: Positive lead up

Positive Leads

TMP36: Flat side, right.
Put things in the F column
to...
Add Components to Breadboard (optional view)
“Fritzing” Style illustration
Note the vertical bars on
right – polarity reve...
Add Resistors to Negative LED leads
Resistors connect
negative LED leads with
GROUND.
Remember Fritzing may
not match your...
Connect Power
+/Red to 5V
-/Blue to Ground
Connect Positive LED leads to Arduino
Purple LED to Digital 2
Green LED to Digital 3
Red LED to Digital 4
Connect Piezo Speaker
Top pin to Arduino Digital 5
Bottom pin to to -/Blue
(Ground)
Connect TMP36 – PLEASE DOUBLE CHECK
Middle to A0
Top to - / Blue (Ground)
Bottom to + / Red
Polarity Matters here –
revers...
Plug In The Battery!
Purple & Green Light = initializing.
Purple (flashing) = Xbee activity

Green = ready
Red = alarm
Dis...
Raspberry Pi in action
Connected to the network.
GPIO cable to breadboard
XBee to TTYAMA0
Org Configuration

Apex REST

Streaming API
Communication Protocol
To Arduino

To Raspberry Pi

^Address:Messagen

REST format (single line)

Address = 2 char

{

Mes...
System Flow
Lessons Learned
Prototype, not production.
Test with a meaningful # of devices.

Easy to set up race conditions.
Arduino i...
@ReidCarlberg(Link)
http://github.com/ReidCarlberg/DF13_WirelessSensorNetwork
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IoT Projects - DIY Wireless Sensor Network at Dreamforce 2013 #DevZoneLab

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Follow along as we make a Wireless Sensor Network using the Arduino, XBee and a free Salesforce.com Developer Edition.

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IoT Projects - DIY Wireless Sensor Network at Dreamforce 2013 #DevZoneLab

  1. DIY Wireless Sensor Networks 18 Nov 2013, 9:00am, Dreamforce Reid Carlberg, Salesforce.com, Director - Evangelism @ReidCarlberg(Link) Update: 30 Jan 2014 (a)
  2. Safe harbor Safe harbor statement under the Private Securities Litigation Reform Act of 1995: This presentation may contain forward-looking statements that involve risks, uncertainties, and assumptions. If any such uncertainties materialize or if any of the assumptions proves incorrect, the results of salesforce.com, inc. could differ materially from the results expressed or implied by the forward-looking statements we make. All statements other than statements of historical fact could be deemed forward-looking, including any projections of product or service availability, subscriber growth, earnings, revenues, or other financial items and any statements regarding strategies or plans of management for future operations, statements of belief, any statements concerning new, planned, or upgraded services or technology developments and customer contracts or use of our services. The risks and uncertainties referred to above include – but are not limited to – risks associated with developing and delivering new functionality for our service, new products and services, our new business model, our past operating losses, possible fluctuations in our operating results and rate of growth, interruptions or delays in our Web hosting, breach of our security measures, the outcome of any litigation, risks associated with completed and any possible mergers and acquisitions, the immature market in which we operate, our relatively limited operating history, our ability to expand, retain, and motivate our employees and manage our growth, new releases of our service and successful customer deployment, our limited history reselling non-salesforce.com products, and utilization and selling to larger enterprise customers. Further information on potential factors that could affect the financial results of salesforce.com, inc. is included in our annual report on Form 10-K for the most recent fiscal year and in our quarterly report on Form 10-Q for the most recent fiscal quarter. These documents and others containing important disclosures are available on the SEC Filings section of the Investor Information section of our Web site. Any unreleased services or features referenced in this or other presentations, press releases or public statements are not currently available and may not be delivered on time or at all. Customers who purchase our services should make the purchase decisions based upon features that are currently available. Salesforce.com, inc. assumes no obligation and does not intend to update these forward-looking statements.
  3. We’re Building a Wireless Sensor Network REST API XBee Streaming API Node JS http://github.com/ReidCarlberg/DF13_WirelessSensorNetwork
  4. Hands on making is the best way to learn connected device app development.
  5. Arduino – Open Source Prototyping Board. ATmega328 Controller 32k of RAM Easy to program (~C++) No SSL. Arduino Classes here Tues & Thurs
  6. XBee Cheap, easy Serial communication Self configuring Stop by the Etherios table to learn more!
  7. Raspberry Pi Single board computer Education focused Runs Linux/Python/Node Network Aware SSL Capable
  8. Salesforce Platform APIs make it dead easy Free developer edition We all know how to use it
  9. Bill Of Materials Arduino Experimenter’s Kit: $85 Arduino XBee Shield: $25 XBee Pro Series 1 (2): $76 Raspberry Pi Starter Pack: $105 Xbee Adapter Kit: $10 Salesforce Developer Edition: FREE 9V Battery: $2 Total: $303
  10. Breadboards +/- conduct up and down. #’s conduct side to side A,b,c,d,e, etc don’t matter Voltage goes to + (red) Ground goes to – (blue) Put component leads in different # rows – up and down, not side to side
  11. Wires Red or Orange – Positive Black or Green – Negative Otherwise doesn’t matter
  12. Polarity Sometimes Matters Positive is voltage in. Negative is voltage out. Matters on: LED, TMP36 Doesn’t matter on: RESISTORS, PIEZO On an LED, the long lead is POSITIVE.
  13. Know Your Voltage 3.3V or 5.0V Everything today is 5.0V safe. **Connect to 5V
  14. Get Everything Out It’s in a bag on top. You can dig through the explorer kit later.
  15. Assemble the Shield Stack the wireless shield on top of the Arduino. Be careful not to bend any pins!
  16. Add the XBee Don’t force it. Make sure all the pins are in.
  17. Add Components to Breadboard LED: Positive lead up Positive Leads TMP36: Flat side, right. Put things in the F column toward the center. + + +
  18. Add Components to Breadboard (optional view) “Fritzing” Style illustration Note the vertical bars on right – polarity reversed! Careful: RED & BLUE REVERSED
  19. Add Resistors to Negative LED leads Resistors connect negative LED leads with GROUND. Remember Fritzing may not match your board!
  20. Connect Power +/Red to 5V -/Blue to Ground
  21. Connect Positive LED leads to Arduino Purple LED to Digital 2 Green LED to Digital 3 Red LED to Digital 4
  22. Connect Piezo Speaker Top pin to Arduino Digital 5 Bottom pin to to -/Blue (Ground)
  23. Connect TMP36 – PLEASE DOUBLE CHECK Middle to A0 Top to - / Blue (Ground) Bottom to + / Red Polarity Matters here – reversed wiring will result in a VERY HOT TMP36.
  24. Plug In The Battery! Purple & Green Light = initializing. Purple (flashing) = Xbee activity Green = ready Red = alarm Disco Lights = DISCO If you smell something burning your TMP36 is wired wrong. Disconnect your battery, wait for it to cool & try again.
  25. Raspberry Pi in action Connected to the network. GPIO cable to breadboard XBee to TTYAMA0
  26. Org Configuration Apex REST Streaming API
  27. Communication Protocol To Arduino To Raspberry Pi ^Address:Messagen REST format (single line) Address = 2 char { Message = 5 char “addr”:”A1”, Specific Unit Ex: ^A1:ALARMn “msg”:”hello”, All Units Ex: ^00:DISCOn “detail”:”tmp36,alarm,disco” }
  28. System Flow
  29. Lessons Learned Prototype, not production. Test with a meaningful # of devices. Easy to set up race conditions. Arduino is limited. Simple communication protocols are better.
  30. @ReidCarlberg(Link) http://github.com/ReidCarlberg/DF13_WirelessSensorNetwork

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