1. Micro & Mobile
Pance Cavkovski

2. The author
• Pance Cavkovski
• Senior Software Engineer @ Netcetera
• Java, Flex & JavaScript developer
• Hardware & electronics fan
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3. The device
• Raspberry Pi + Arduino
• Basic multimeter: AC/DC voltage,
frequency spectrum, resistance
• Results shown in a mobile web application
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4. The hardware
• Raspberry Pi
• Arduino Mega 2560
• Custom adapter and
interface board
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5. The software
Browser app
d3js
d3js
JSON
• Arduino readings
• Java8 SE Embedded server
• D3.js animated SVG graphs
Java
Java
Java8
WebSocket
WebSocket
lighttpd
pi4j
pi4j
Serial communication
Analog read + FFT
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6. The demo
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7. The mobile reason
• Mobile is not just responsive
• Mobile browsers are getting lot faster
• JavaScript applications can run smoothly
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8. The micro reason
• Micro devices are catching on and improving
• Raspberry Pi Mod. B rev. 2: 700MHz ARM, 512MB SDRAM
Rumored Model C: Dual Core, 1GB RAM ?
• Arduino TRE: Intel 1GHz ARM, 512MB DDR3l RAM
• Lots of sensors and shields available
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9. The Java reason
• Java8 improves the embedded editions
• Java8 SE Embedded:
mid-high range, Full OS, general functions, limited I/O integration
• Java8 ME Embedded (v.3.3) :
low-mid range, Full/min OS, I/O integrated, optimized, available tools
• Developer versions available
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10. Thanks for the attention!
Follow @hsilomedus
pance.cavkovski@netcetera.com
github.com/hsilomedus/pi4jmultimeter