This deck discusses another case study combining mobile, cloud, and IoT. I presented it during Bandung Developer Day #2 event, on Dec 10, 2015, at UNIKOM university, Bandung. It's part of this deck: http://www.slideshare.net/andri_yadi/mobile-cloud-iot-future Complete source code: https://github.com/andriyadi/Espruino-ElectricityMeterReader

1. @andri_yadi | a at dycode dot com
http://andriyadi.me
Mobile + Cloud + IoT = Future
Andri Yadi
A story of product development, combining those
Part 2

2. CEO of
DyCode’s subsidiary, focuses on Jepret and IoT products
http://dycodex.com

3. This deck is part of this one:
http://www.slideshare.net/andri_yadi/mobile-cloud-iot-future

4. Another Case Study
Free idea, for you to build :)

5. You want to create mobile app to monitor electricity usage

6. How do you achieve that?

7. Alternative #1 - Solution
Manually enter the reading from electricity meter, regularly

8. Alternative #1 - Problem
Are we living in a stone age? There should be a better solution :P

9. Another meter (digital version)
Anything in this meter that represents
usage?
Readable not only by human, but also
by machine

10. LED blinking represents usage
1000 pulse = 1 kWh
1 pulse = 1Wh
where 1 pulse = period = seconds
between adjacent LED on
Wattage = 3600 second/period
Turn out, there is…

11. If only we have a way to read the
LED pulsing period

12. Create mobile app to capture
the blinking
Do simple image processing to
determine that LED is ON or
OFF
Then determine the frequency
of the ONs
Alternative #2 - Solution

13. Still need to physically come to the
meter, to capture the blinking
Impossible to do online usage
monitoring
Alternative #2 - Problems

14. Cannot be solved solely by
Mobile App

15. Architecture
Mobile app
Cloud
Data Source ????
For further data analysis and remote monitoring, you may need Cloud
Still, how we collect the data?

16. You need IoT

17. Architecture
Mobile app
Cloud
IoT device is the data source
IoT
Sensor
MCU
Network
MQTT MQTT

18. IoT Architecture
WiFi ModuleLight sensor
(Photosensitive Diode)
MCU

19. Used to determine electricity
meter’s LED is being ON or OFF
Put it as close as possible to
meter’s LED
LED is ON —> lower ADC value
from light sensor
Light sensor

20. Demo

21. Demo Architecture
iOS app
MQTT Broker
on Azure
MQTT MQTT
Espruino + Light Sensor

22. For simplicity of this demo, I use
Espruino platform for MCU
and development framework
Espruino

23. For internet connectivity via WiFi, I use ESP8266.
Connected to Espruino Pico via WiFi Shim
Espruino + WiFi

24. Instead of purchasing nice looking Shim, I made my own!
Ugly, I know :)
Espruino + WiFi

25. Espruino + WiFi +
Light sensor
Setup
AO of light sensor <—> A5 of Espruino
VCC of light sensor <—> 3.3v of Espruino
GND <—> GND

26. Show me da Code!

27. iOS App Espruino Web IDE

28. https://github.com/andriyadi/
Espruino-ElectricityMeterReader
Everything is here:

29. Custom IoT/hardware for your startup or any
custom requirements?
office@dycode.com

30. http://edu.dycode.co.id | edu@dycode.com
a bit of ads…

31. We contribute
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32. We teach
+ + [Obj-C]
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33. Opening soon…
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34. Thanks!
Andri Yadi
Email — a at dycode dot com
twitter — @andri_yadi
www — andriyadi.me
github — github.com/andriyadi