Download - Mobile + Cloud + IoT - Case Study
@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
CEO of
DyCode’s subsidiary, focuses on Jepret and IoT products
http://dycodex.com
This deck is part of this one:http://www.slideshare.net/andri_yadi/mobile-cloud-iot-future
Another Case StudyFree idea, for you to build :)
You want to create mobile app to monitor electricity usage
How do you achieve that?
Alternative #1 - Solution Manually enter the reading from electricity meter, regularly
Alternative #1 - Problem Are we living in a stone age? There should be a better solution :P
Another meter (digital version)
Anything in this meter that represents usage? Readable not only by human, but also by machine
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…
If only we have a way to read the LED pulsing period
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
Still need to physically come to the meter, to capture the blinking Impossible to do online usage monitoring
Alternative #2 - Problems
Cannot be solved solely by Mobile App
Architecture
Mobile app
Cloud
Data Source ????
For further data analysis and remote monitoring, you may need Cloud Still, how we collect the data?
You need IoT
Architecture
Mobile app
Cloud
IoT device is the data source
IoT
Sensor
MCU
Network
MQTT MQTT
IoT Architecture
WiFi ModuleLight sensor (Photosensitive Diode)
MCU
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
Demo
Demo Architecture
iOS app
MQTT Broker on Azure
MQTT MQTT
Espruino + Light Sensor
For simplicity of this demo, I use Espruino platform for MCU and development framework
Espruino
For internet connectivity via WiFi, I use ESP8266. Connected to Espruino Pico via WiFi Shim
Espruino + WiFi
Instead of purchasing nice looking Shim, I made my own! Ugly, I know :)
Espruino + WiFi
Espruino + WiFi +Light sensor
SetupAO of light sensor <—> A5 of Espruino
VCC of light sensor <—> 3.3v of Espruino GND <—> GND
Show me da Code!
iOS App Espruino Web IDE
https://github.com/andriyadi/Espruino-ElectricityMeterReader
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