2016/03/13に行われたJAWS DAYS2016の発表資料です。

1. AWS IoTで
家庭内IoTやってみた
土持 昌志

2. 自己紹介
• 土持昌志
• @pampitter
• 株式会社鈴木商店
• JAWS-UG大阪
• 好きなAWSサービス：Lambda、S3

3. AWS IoTをやってみたきっかけ

4. AWS IoTをやってみたきっかけ
• 2015年10月に子供が生まれました
• 2015年10月のre:InventでAWS IoT発表
• 風邪・インフルエンザ対策に湿度データを収
集してみよう

5. AWS IoTの概要

6. Device Gateway
Device
Gateway
(Broker)
Publisher Subscriber
Publisher
Publisher Subscriber
Subscriber
MQTT
HTTP
WebSocket
MQTT
HTTP
WebSocket

7. Rule Engine
Action
SELECT humidity
FROM '#'
WHERE humidity <= 40
Rule Query
Device
Gateway
{"temp": 20.0}
{"humidity": 40.0}
{"temp": 22.0}
{"humidity": 70.0}
{"temp": 21.0}
{"humidity": 20.0}
{"humidity": 40.0}
{"humidity": 20.0}

8. Demo 1
湿度センサー
MQTT
Rule EngineTopic

9. センサーデータを収集
# -*- coding: utf-8 -*-
from __future__ import division
from __future__ import absolute_import
from __future__ import print_function
from __future__ import unicode_literals
from sense_hat import SenseHat
import datetime
import json
sense = SenseHat()
hum = sense.get_humidity()
now = datetime.datetime.now()
hum_json = {
'timestamp': now.strftime("%Y-%m-%d %H:%M:%S"),
'humidity': hum
}
print(json.dumps(hum_json))

10. var execSync = require('child_process').execSync;
module.exports = {
sensor: function() {
var data = "" + execSync('python ' + __dirname + '/sensor.py');
return JSON.parse(data);
}
}
NodeからPythonへのブリッジ

11. var awsIot = require('aws-iot-device-sdk');
var bridge = require('./bridge.js');
var device = awsIot.device({
keyPath: './certs/private.pem.key',
certPath: './certs/certificate.pem.crt',
caPath: './certs/root-CA.crt',
clientId: 'pi2_01',
region: 'ap-northeast-1'
});
device
.on('connect', function() {
console.log('connect');
setInterval(function() {
var humidity = bridge.sensor();
console.log(humidity)
device.publish('pi2_01', JSON.stringify(humidity));
}, 1000);
});
AWS IoTにパブリッシュ

12. Demo 1

13. Device Shadow
Device Device Shadow
App

14. • desired:管理アプリなどから指定されたあるべき状態
• reported:デバイスが報告した現在の状態
• delta:desiredとreportedの差分
Device Shadow
{
"desired": {
"color": "white"
},
"reported": {
"color": "white"
}
}
{
"desired": {
"color": "red"
},
"reported": {
"color": "red"
}
}
{
"desired": {
"color": "red"
},
"reported": {
"color": "white"
},
"delta": {
"color": "red"
}
}

15. Demo 2
LED
Device Shadow Console

16. LEDを点灯
# -*- coding: utf-8 -*-
from __future__ import division
from __future__ import absolute_import
from __future__ import print_function
from __future__ import unicode_literals
from sense_hat import SenseHat
import sys
sense = SenseHat()
argv = sys.argv
colors = {
"red": (255, 0, 0),
"yellow": (255, 215, 0),
"green": (50, 205, 50),
"blue": (0, 0, 255),
"light_blue": (91, 192, 222),
"white": (255, 255, 255),
"black": (0, 0, 0)
}
if colors.has_key(argv[1]):
color = colors[argv[1]]
else:
color = colors['black']
pixels = []
for pix in range(0, 64) :
pixels.append(color)
sense.set_pixels(pixels)

17. var execSync = require('child_process').execSync;
module.exports = {
sensor: function() {
var data = "" + execSync('python ' + __dirname + '/sensor.py');
return JSON.parse(data);
},
led: function(color) {
execSync('python ' + __dirname + '/led.py ' + color);
return;
}
}
NodeからPythonへのブリッジ

18. var awsIot = require('aws-iot-device-sdk');
var bridge = require('./bridge.js');
var thingShadows = awsIot.thingShadow({
keyPath: './certs/private.pem.key',
certPath:
'./certs/certificate.pem.crt',
caPath: './certs/root-CA.crt',
clientId: 'pi2_01',
region: 'ap-northeast-1'
});
var clientTokenGet;
var clientTokenUpdate;
thingShadows.on('connect', function() {
thingShadows.register('pi2_01');
setTimeout(function() {
clientTokenGet =
thingShadows.get('pi2_01');
}, 2000);
});
Device ShadowからLEDを操作
thingShadows.on('status', function(thingName, stat,
clientToken, stateObject) {
console.log('received ' + stat + ' on ' + thingName +
': ' + JSON.stringify(stateObject));
if('delta' in stateObject.state && 'color' in
stateObject.state.delta){
var delta_state = stateObject.state.delta.color;
bridge.led(delta_state);
console.log('received delta ' + ' on ' + thingName
+ ': ' + JSON.stringify(stateObject));
clientTokenUpdate = thingShadows.update('pi2_01',
{ "state": { "reported": { "color": delta_state } } });
}
});
thingShadows.on('delta', function(thingName, stateObject)
{
var state = stateObject.state.color;
bridge.led(state);
console.log('received delta ' + ' on ' + thingName +
': ' + JSON.stringify(stateObject));
clientTokenUpdate = thingShadows.update('pi2_01', {
"state": { "reported": { "color": state } } });
});
thingShadows.on('timeout', function(thingName,
clientToken) {
console.log('received timeout ' + ' on ' + operation +
': ' + clientToken);
});

19. Demo 2

20. Demo 3
湿度センサー
Rule EngineTopic
LED
Device Shadow

21. var awsIot = require('aws-iot-device-sdk');
var bridge = require('./bridge.js');
var thingShadows = awsIot.thingShadow({
keyPath: './certs/private.pem.key',
certPath: './certs/certificate.pem.crt',
caPath: './certs/root-CA.crt',
clientId: 'pi2_01',
region: 'ap-northeast-1'
});
var clientTokenGet;
var clientTokenUpdate;
thingShadows.on('connect', function() {
thingShadows.register( 'pi2_01' );
setTimeout( function() {
clientTokenGet = thingShadows.get('pi2_01');
}, 2000 );
setInterval(function() {
var humidity = bridge.sensor();
console.log(humidity)
thingShadows.publish('pi2_01',
JSON.stringify(humidity));
}, 1000);
});
センサーデータを収集／
Device ShadowからLEDを操作
thingShadows.on('status', function(thingName, stat,
clientToken, stateObject) {
console.log('received ' + stat + ' on ' + thingName +
': ' + JSON.stringify(stateObject));
if('delta' in stateObject.state && 'color' in
stateObject.state.delta){
var delta_state = stateObject.state.delta.color;
bridge.led(delta_state);
console.log('received delta ' + ' on ' + thingName
+ ': ' + JSON.stringify(stateObject));
clientTokenUpdate = thingShadows.update('pi2_01',
{ "state": { "reported": { "color": delta_state } } });
}
});
thingShadows.on('delta', function(thingName, stateObject)
{
var state = stateObject.state.color;
bridge.led(state);
console.log('received delta ' + ' on ' + thingName +
': ' + JSON.stringify(stateObject));
clientTokenUpdate = thingShadows.update('pi2_01', {
"state": { "reported": { "color": state } } });
});
thingShadows.on('timeout', function(thingName,
clientToken) {
console.log('received timeout ' + ' on ' + operation +
': ' + clientToken);
});

22. センサーデータを収集／
Device ShadowからLEDを操作
// データの送受信のみの場合はdevice.publish
device.publish('pi2_01', JSON.stringify(humidity));
// DeviceShadow使用時はthingShadows.publish
thingShadows.publish('pi2_01', JSON.stringify(humidity));

23. # -*- coding: utf-8 -*-
from __future__ import print_function
from __future__ import unicode_literals
from __future__ import absolute_import
from __future__ import division
import json
import boto3
print('Loading function')
iot = boto3.client('iot-data')
def lambda_handler(event, context):
print("Received event: " + json.dumps(event))
humidity = event['humidity']
if humidity < 40:
color = 'blue'
elif humidity >= 40 and humidity <= 70:
color = 'green'
else :
color = 'red'
DeviceShadowを操作する
Lambda Function
try:
shadow_stream = response = iot.get_thing_shadow(
thingName='pi2_01'
)
shadow_string =
shadow_stream['payload'].read().decode('utf-8')
shadow = json.loads(shadow_string)
desired_color = shadow['state']['desired']['color']
if color != desired_color:
payload = {
"state": {
"desired": {
"color": color,
}
}
}
iot.update_thing_shadow(
thingName='pi2_01',
payload=json.dumps(payload)
)
print('Update DeviceShadow delta:
{}'.format(color))
else:
print('DeviceShadow has been updated')
return
except Exception as e:
print(e)
print('Error')
raise e

24. Demo 3

25. 気をつけたいところ
• DynamoDBにデータが入らない！？
• AWS SDKにIoT関連のものが2つある

26. DynamoDBにデータが入らない！？

27. DynamoDBにデータが入らない！？

28. • Python
• Node.js
• Java
AWS SDKにIoT関連のものが2つある

29. まとめ
• AWS IoTで簡単にセンサーデータをアップで
きるようになった。
• Device Shadowでリモートからのデバイス制
御がやりやすくなった。
• この冬は風邪を引かなかった！

30. まとめ
• 家庭の課題解決からIoTを始めよう！