LASS Data Platform

1. Sensor Data
• sensor data contributed by LASS devices
• sensor data contributed by 3rd party devices/projects
• government data retrived from Gov Open Data or crawled from the official website
• labels (events, notes, etc) contributed by end users
• the detailed list of the supported sensors and their IDs are available on the LASS Data Specification page

1. MQTT Server
• information gateway that receives raw data of LASS devices via MQTT protocol
• the data format is defined on the LASS Data Format page
• Server address: gpssensor.ddns.net

1. Customized MQTT Client
• MQTT clients to subscribe LASS data relayed by MQTT server
• Examples:
1. MQTT clients: 
   1. Install MQTTLens in chrome browser. MQTTLens in chrome . You need to setup host: gpssensor.ddns.net, topic: LASS/# 
   2. Install MQTT clients on your smart phone and subscribe the topic "LASS/#" on the server gpssensor.ddns.net
2. lass_pm25_to_thingspeak.py: a python program that subscribes the MQTT server to relay FT1 data to the corresponding ThingSpeak channel
3. lass2db.py: a python program that subscribes the MQTT server to read FT1 data and insert into corresponding databases

• The data archive provided by the MQTT server
• To access the data, please follow the document: How to get data log from server

1. IoT Cloud
• Public data service for IoT applications
• Examples
1. ThingSpeak

• Examples
1. MongoDB
   1. Host 1 @ Academia Sinica: lass.iis.sinica.edu.tw (to be available soon)
   2. Host 2 @ NCTU (to be available soon)
2. Couchbase
   1. Host 1 @ Academia Sinica: lass.iis.sinica.edu.tw (to be available soon)
   2. Host 2 @ NCTU (to be available soon)
3. KairosDB
   1. System 1 @ Academia Sinica (AWS), NCHC, NCTU, and NCKU              
• DB Query API
• Public API to access databases directly mentioned in (6) 
1. JSON API
• Public API to access data in the archive via the JSON format
• The data archive owner can provide JSON API to release data via HTTP protocal, while keeping their archive inside the firewall
• The full API list is available on the page: https://sites.google.com/site/pm25opendata/open-data
1. Applications
   1. Data analysis/visualization
      1. The full list of data visualization tools is on the page: https://sites.google.com/site/pm25opendata/visi
   2. Data portal
      1. Kibana

Request & Discussion 

• to show the air quality data in a specific period of time:
  • start  Start date in format YYYY-MM-DDTHH:NN:SSZ (optional)
  • end  End date in format YYYY-MM-DDTHH:NN:SSZ (optional)
  • example: http://nrl.iis.sinica.edu.tw/LASS/history.php?device_id=FT1_001&start=2016-04-05T06:00:00Z&end=2016-04-05T07:00:00Z
• results (integer) Number of entries to retrieve, 8000 max (optional)
• days (integer) Number of 24-hour periods before now to include in feed, default 1 (optional)
• A proposal to integrate LASS into Spatial Data Infrastructure via OGC standards
  • draft sequence diagram