Text
Page: 1
mruby/c: IoT system for
🍶 SAKE brewery 🍶
HASUMI Hitoshi @hasumikin
Monstar Lab
SWEST21 ♨♨♨ 下呂温泉 水明館
Sep. 6, 2019
Page: 2
Me
HASUMI Hitoshi
@hasumikin
Matsue city,
a holy place of Ruby
Sake 🍶
Soba 🍜
Coffee ☕
Page: 8
旭日酒造
one of the best Japanese Sake brewery
Asahi-shuzo and I make an IoT system using mruby/c
Page: 9
Asahi-shuzo
旭酒造(Asahi-shuzo), Yamaguchi: 獺祭(Dassai). fruity,
aromatic and sweet
朝日酒造(Asahi-shuzo), Niigata: 久保田(Kubota). clear,
dry and sharp
朝日酒造(Asahi-shuzo), Fukui: ？？？
旭日酒造(Asahi-shuzo), Shimane: 十旭日(Juji-Asahi).
tasteful, mature with years and good for お燗(warmed
style)
Page: 10
What is mruby/c?
Page: 11
What is mruby/c?
github.com/mrubyc/mrubyc
yet another implementation of mruby
`/c` symbolizes compact,
concurrent and capability
especially dedicated to
one-chip microcontroller
Page: 12
mruby and mruby/c
mruby
v1.0.0 in Jan 2014
for general embedded
software
RAM < 400KB
mruby/c
v1.0 in Jan 2017
for one-chip
microcontroller
RAM < 40KB
Page: 13
About my IoT project
IoT system for Asahi-shuzo
delivered to actual brew work in January 2018
devices post temperature of Sake materials in brewing,
surrounding temperature and humidity to server
data is displayed on smartphone app
Page: 14
About my IoT project
Page: 15
What is "taking temperature" ?
Page: 16
what is "taking temperature" ?
Page: 17
what is "taking temperature" ?
Page: 18
1st season (2017BY)
Page: 19
1st season (2017BY)
before mruby/c
Page: 20
1st season (2017BY)
Page: 21
1st season (2017BY) architecture
sensortags ->(BLE)-> gateway
gateway ->(WiFi)-> router
router ->(3G)-> internet
Page: 22
1st season (2017BY) architecture
sensortags ->(BLE)-> gateway
gateway ->(WiFi)-> router
router ->(3G)-> internet
Having a stack of multiple wirelesses is so hard
😨
Page: 23
1st season (2017BY) architecture
Page: 24
1st season (2017BY) architecture
超えられない壁
Page: 25
1st season (2017BY) architecture
a thick wall
BLE couldn't through the wall
water everywhere
power suppply issue
number of instrument should be minimized
Page: 27
BY?
Brewing Year, from July to June
in Asahi-shuzo a BY work starts on November and
finishes on April (depends on year)
Page: 28
2nd season (2018BY)
Page: 29
2nd season (2018BY)
A N E W H O P E
Page: 30
2nd season (2018BY)
m r u b y / c
Page: 31
2nd season (2018BY) architecture
devices ->(3G)-> Internet
Page: 32
2nd season (2018BY) the device
Page: 33
2nd season (2018BY) architecture
Page: 34
2nd season (2018BY) architecture
Page: 35
2nd season (2018BY) mruby/c
mruby/c does everything
sensors - I2C, ADC
Fixnum, Float, Math
7seg LED display - transistor array
String, Mutex
3G communication module - UART
String, flow control
Page: 36
2nd season (2018BY)
what were difficult about mruby/c?
we can neither do step execution nor look into
appropriate memory address of mruby/c's variables
so many troubles in IoT
hard to find why the application doesn't work well
Page: 37
2nd season (2018BY)
what were difficult about mruby/c?
mruby/c was growing
bugs, lack of features, docs and examples
Page: 38
2nd season (2018BY)
so, was mruby/c bad?
Page: 39
2nd season (2018BY)
so, was mruby/c bad? - NO
IoT at work makes you hurry
you have to go back and forth between dark 10℃ storage
cellar and humid 35℃ manufacturing room
you have to amend your firmware with your small laptop in 10
minutes
you will thank Ruby's descriptiveness and agility
Page: 41
3rd season (2019BY)
Page: 44
Technology stack of IoT (1/2)
TCP/IP
cloud service
RDB and KVS
server programming
mobile programming
security
test
Page: 45
Technology stack of IoT (2/2)
high school physics electricity and transistor
microcontroller and peripherals like UART, I2C, ADC,
etc.
circuit and PCB artwork
soldering and wiring
3D CAD for housing
suppliers
firmware programming
Page: 46
Summary
mruby/c
mruby/c
mruby/c
mruby/c
Page: 47
Summary
mruby/c is a Ruby for microcontroller
mruby/c
mruby/c
mruby/c
Page: 48
Summary
mruby/c is a Ruby for microcontroller
mruby/c runs on Asahi-shuzo
mruby/c
mruby/c
Page: 49
Summary
mruby/c is a Ruby for microcontroller
mruby/c runs on Asahi-shuzo
mruby/c can be ensured by test
mruby/c
Page: 50
Summary
mruby/c is a Ruby for microcontroller
mruby/c runs on Asahi-shuzo
mruby/c can be ensured by test
mruby/c is ready
