How to analyse sensor data

Wiki information (Maybe outdated)

lass.py data input

• Receive MQTT topic data
  • sudo python lass.py
  • CLI: monitor ( By default system will filter and keep ver_format=3’s data)
• Load an existed sensor data log file
  • sudo python lass.py --lasscmd  (By default monitor will not be enabled in this mode)
  • CLI: loaddata data.log

Show latest all devices’s dust sensor value on google map

• lass.py export json
  • CLI: export
  • CLI: export> json geodata.json 1
• use browser ( Chrome ) to open client_map.html

Import KML of all devices’s dust sensor value to google map

• lass.py export kml
  • CLI: export
  • CLI: export> kml my.kml
• Upload your KML file in to Google Map or Google Earth

Produce CSV file for R or other analytics tool to read

• lass.py export csv
  • CLI: export
  • CLI: export> csv my.csv

CLI: data

CLI: data> desc : show current data sorting by time

CLI: data> plot : plot sensor data and save  #0: all data, 1: one sensor data, 2: one sensor diff data

CLI: data> server_import : Import data from server’s log

CLI: data> gps_to_map : transform gps data value to google map format

CLI: data> filter_by_datetime : ilter data, only keep data in the datetime range

CLI: setting

Convert the GPS information from log to google map

1. Get GPS information from log

• Example:

LASS/Test/PM25 |ver_format=3|fmt_opt=0|app=PM25|ver_app=0.7.13|device_id=FT1_035|tick=500198327|date=2015-12-04|time=20:15:59|device=LinkItONE|s_0=8272.00|s_1=100.00|s_2=1.00|s_3=0.00|s_4=1.00|s_d0=36.00|s_t0=15.60|s_h0=96.90|s_d1=50.00|gps_lat=24.353596|gps_lon=120.523129|gps_fix=1|gps_num=16|gps_alt=8

2. lass.py

data/

LASS>data

LASS:data>help

Documented commands (type help <topic>):

========================================

desc  fake_gen  filter_by_datetime  gps_to_map  help  plot  quit  server_import

LASS:data>help gps_to_map

 transform gps data value to google map format

        gps_to_map [Latitude,gps_lat],[Longitude, gps_lon]

        ex: gps_to_map 25.024037,121.368875

LASS:data>gps_to_map 24.353596,120.523129

google map format(Latitude,Longitude,altitude): 24.589327,120.871882

Copy paste 24.589327,120.871882 into google map. 

Show 1 device trace on the google map

1. download the data you need 

• wget ftp://gpssensor.ddns.net:2121/data.log-20160208
• wget ftp://gpssensor.ddns.net:2121/data.log

1. merge all data file into 1 single data file

• cat data.log-20160208 data.log > data1.log

1. filter your device

• cat data1.log | grep ’FT1_xxx’ > data2.log

1. python lass.py

• loaddata data2.log
• export
• export> kml filename.kml

1. import this kml into google my map

• Here is sample result