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Document related concepts
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Transcript 
Internet
of
THINGIES
© 2015 The OpenNMS Group, Inc.
@SwiftOnSecurity
Ken Eshelby
[email protected]
IRC: esh^/#opennms/freenode.net
https://github.com/xplorn
@xplorn
The Dream
© 2015 The OpenNMS Group, Inc.
more detail
gets complex
please
no
Where to begin?
© 2015 The OpenNMS Group, Inc.
Design Goals
•
•
•
•
•
•
•
“open”
Common components
Not too expensive
Some flexibility
Innocuous or portable
Energy efficient
loads of Google examples
Things I like
•
•
•
•
data
comparative data
working with hand tools
working with power tools
fire or heat, +1
• strange gadgets
• loads of Google examples
–
How did I get here?
Making a collectable
temperature sensor
© 2015 The OpenNMS Group, Inc.
*thingy
© 2015 The OpenNMS Group, Inc.
Arduino compatible sensors
Some sensor differences
•
•
•
•
BMP180
–
Temp + Barometric Pressure
–
Digital I/O (I2C)
–
3-5V
–
High precision
DS18B20
–
Temp
–
Digital I/O + OneWire
–
3-5V
–
Waterproof
DHT22
–
Temp + Humidity
–
Digital I/O
–
3-5V
TMP36
–
Temp
–
Analog
–
2.7-5.5V
Wait... Arduino?
© 2015 The OpenNMS Group, Inc.
• General purpose
programmable
boards
• Digital and
Analog I/O pins
• program over
USB
• 7-12V input, 3.3
or 5V output
• Many varieties
Need IP communication
• Ethernet shield board
• IP-related protocol libraries
• SNMP libraries exist but seem to
be erratic
• WiFi? XML? Web server?
• or other ways to collect sensor
data?
A challenger appears...
© 2015 The OpenNMS Group, Inc.
ESP8266
•
•
•
•
•
(ESP-01)
about $5
Digital and Analog I/O pins
program it with USB cable
3.3V input, does not power sensors
many models, varieties, firmwares
so many wifis!
such cloud!
• built-in WiFi
• built-in TCP/IP
• built-in web server
prototype
Details. The
3.3V regulator
generates
excess heat
with higher
voltage. 12V
input requires
heatsink, 6V
would not.
Tools
Tools
Tools
Tools
•
•
•
•
wire strippers / electrician's scissors
voltmeter
various pliers- needle nose, large/small
good soldering iron- better quality makes
repetitive work easier
• smaller screwdrivers, jeweler's screwdrivers
• variable power supply- not required, but very
useful
• various lights, magnifiers... age dependent
Arduino IDE
• Serial console
• sensor libraries
• web server
libraries
• Easy to use
• loads of Google
examples!
Results
OpenNMS configs
Node Provisioning
imports/Sensors.xml
<node building="Sensors" foreign-id="1439622677282" node-label="Sensor 1 Kitchen">
<interface descr="" ip-addr="192.168.9.54" status="1" snmp-primary="P">
<monitored-service service-name="DHT22sensor"/>
</interface>
OpenNMS configs
HTTP data collection
collectd-configuration.xml
<service name="DHT22sensor" interval="300000" user-defined="true" status="on">
<parameter key="http-collection" value="dht22sensor"/>
<parameter key="thresholding-enabled" value="true"/>
</service>
<collector service="DHT22sensor" class-name="org.opennms.netmgt.collectd.HttpCollector"/>
http-datacollection.xml
<http-collection name="dht22sensor">
<rrd step="300">
<rra>RRA:AVERAGE:0.5:1:17280</rra>
<rra>RRA:AVERAGE:0.5:12:18240</rra>
<rra>RRA:AVERAGE:0.5:288:1825</rra>
<rra>RRA:MAX:0.5:288:1825</rra>
<rra>RRA:MIN:0.5:288:1825</rra>
</rrd>
<uris>
<uri name="sensor">
<url path="/"
matches="^\S+Temperature:\s([0-9]+).*Humidity:\s([0-9]+).*">
</url>
<attributes>
<attrib alias="sensorTemp" match-group="1" type="gauge"/>
<attrib alias="sensorHumidity" match-group="2" type="gauge"/>
</attributes>
</uri>
</uris>
</http-collection>
Graphs
Revision
© 2015 The OpenNMS Group, Inc.
Not Energy Efficient
•
each http poll uses about 300mA per response
•
4x 1.2V AA rechargeable batteries last < 24h
Odd Fitment
Many Components
•
More points of failure
•
More cost and complexity
ESP8266
(ESP-12)
Adafruit HUZZAH board
•
built-in regulator
•
more inputs
•
analog input
•
integrated flash switch
•
integrated reset switch
•
Lua firmware preloaded
•
$10
ESP Flasher
(NodeMCU Github)
ESPlorer
OpenNMS Grafana Dashboard
OpenNMS Grafana Dashboard
Lessons learned
• hardware will fail
–
2x circuit board regulators
1x ESP8266
hardware will arrive DOA
measure and check voltages often
avoid spilling magic circuit smoke
buy extra
–
•
•
•
•
–
wire, connectors, sensors,
boards
todo
• XML collector
• push collection
deep sleep mode
• sensor comparisons
• better housings
• OpenHAB integration
–
MQTT protocol
• more thingies!
–
Ken Eshelby
[email protected]
IRC: esh^/#opennms/freenode.net
https://github.com/xplorn
@xplorn
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