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(Total Slides=17) T:\LearningDay2016\IoT.pptx
Internet of Things �Tiny Components, Big Possibilities
Derek Kiong
15 July 2016
1© 2016 National University of
Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
What is IoT?
� Network of things with network connectivity
� has embedded electronics, software, sensors,
actuators
� may collect and/or exchange data
� eg -- lamp, proximity sensor, camera, vehicle,
people etc
2© 2016 National University of
Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Application of IoT
� By harnessing ICT, networks and data, the Smart Nation vision seeks to support better living, create more opportunities, and support stronger communities.
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Example �ATM
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Example �Hospital Visitation System
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Example �WiFi enabled SD Card
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� WiFi hotspot/client
� Embedded Web server
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Example �Xiaomi action Camera
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Singapore. All Rights Reserved
� WiFi hotspot/client
� Network API camera remote control
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Raspberry Pi as Sensor Hub
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Raspberry Pi pin layout
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Example actuators �Relays
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
GPIO output
class Relay:
def __init__(self):
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
self.pinList = [22,23,24,25]
def switch(self, switch, state):
pin = self.pinList[switch]
GPIO.setup(pin, GPIO.OUT)
if state == 0:
GPIO.output(pin, GPIO.HIGH)
else:
GPIO.output(pin, GPIO.LOW)
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Example sensor �Motion Sensor
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
GPIO input
class Sensor:
def __init__(self, pin):
self.pin = pin
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(self.pin, GPIO.IN)
def getState(self):
return GPIO.input(self.pin)
def waitFor(self, event):
GPIO.wait_for_edge(self.pin, event)
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
GPIO input (event-driven)
def onStateChange(self, channel):
print "state change occurred"
def setEvent(self, event):
GPIO.add_event_detect
(self.pin, event, callback=self.onStateChange)
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Example �AD/DA converter
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Singapore. All Rights Reserved
#ISSlearn(Total Slides=17) T:\LearningDay2016\IoT.pptx
Example �Text display
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