Chart display the temperature of the end node connected to the Internet with a smartphone.With this mechanism you can see the value of any sensor in the world connected to the Internet with the smartphone.Presenting the simplest IoT model in the demo.

1. Observation of the temperature of
remote place that is easiest and
inexpensive way using Azure
(Smart phone & M5Stack edition)
Lecture materials at a place somewhere in Seattle suburb
7th-MAR-2018
Michihiro Imaoka (Hiro)

2. Notify
The actual
presentation went with
a notepad.
This slide was later
created by adding
devices photos and
screen shots that I
showed on the
demonstration.

3. https://mvp.microsoft.com/ja-jp/PublicProfile/5000851
imaoca@gmail.com
twitter: @imaoca
https://www.facebook.com/imaoka.micihihiro

4. Overview
• Chart display the temperature of the end node
connected to the Internet with a smartphone.
• With this mechanism you can see the value of
any sensor in the world connected to the Internet
with the smartphone.
• Presenting the simplest IoT model in the demo.
• In this demonstration, consideration of security
and credibility has not been done. I will discuss it
on another occasion.

5. Several words
• M5STACK as endnode
• MQTT protocol be used
• IoT Dashboard is client application on
Android phone
• Mosquitto as Broker
• Message is sended to Subscriber via
Broker
• Publisher adds any Topic to Message and
sends it
• Subscriber should specify Topic to receive
needed Message.

6. A diagram of the demonstration
Mosquitto:broder
M5Stack:Subscriber
Iot Dashbord:Publisher
message message
Topic:msg/temperature
Topic: msg/temperature

7. M5Stack
• ESP32 SoC inside
– WiFi & Bluetooth capabilities
– Tensilica 32bit ２ core CPU
– 520KiB SRAM
– AD,DA,SPI,I2C,UART,GPIO
• Color LCD (320x240) included
（Super Mario seems to work）
• Rechargeable battery is in a inside.
• Arduino IDE can be used.
• $ 31 (shipping fee included from
China)
• Microsoft Azure Certified
• See more details
http://m5stack.com/

8. MQTT
• Message Queuing Telemetry Transport
• MQTT is a connection protocol for
M2M and/or IoT
• The model is consisted by
Publisher,Broker,Subscriber
• Lightweight and fast（That being
said）
• Upper layer for TCP
• http://mqtt.org/
S
B
P

9. Mosquitto
• Mosquito is an implementation of MQTT
• It is an implementation that is faithful to the
MQTT specification and becomes a
reference of other implementations
• The normal port uses 1883.
• https://mosquitto.org/

10. IoT Mqtt Dashboard
• MQTT client application running on Android
• Can operate as publisher and subscriber
• You can create a GUI such as a button with simple
operation
• If the message is numeric, chart can be shown
• https://play.google.com/store/apps/details?id=com.thn.iotmq
ttdashboard

11. Programming on M5Stack
The latest version will be released on github https://github.com/imaoca

12. Chart display of temperature data received
as message (Iot Dashboard)
screenshot of setting screenshot of chart

13. Sending temperature data
It is not a thermometer with the LEDs on the left. It is LED for
operation confirmation. The thermometer is in the SoC. So it is
temperature of inside of Soc. It is not room temperature.

14. Conclusion
• Simple
– It is only edge nodes that need to write code
– Only SSID & PASSWORD should be modified
• Cheap
– The cost required to add an end node is just $ 31.
– Cheaper than Raspberry Pi or Arduino
• Portability and Readability
– Most components are open sources.
– Various client applications for smart phones are available for free.
(Some of them are also not open source.)
– Many MQTT clients running on PC are also open source.

15. Thank you
This document will be published as follow.
https://www.slideshare.net/ImaokaMicihihiro
Any contact to me as follows.
imaoca@gmail.com
twitter: @imaoca
https://www.facebook.com/imaoka.micihihiro