Key Features of the SESLogger App
This app is developed for using the innovative, low-cost and pedagogy-embedded Mobile Logger specifically designed and developed for STEM Education, Science Education and Environmental Studies with the following functions:
(1) It can (a) manually or automatically (even in sleeping mode for overnight operation) record data from the mobile logger and (b) control the mobile logger by the buttons or menu at the bottom of this App. The leftmost one is for the choice of sensor while the rightmost one is the action to take. Click the middle button once to take a measurement but if you make a long click, it will toggle between Automatic or manual Measure mode.
(2) You may (a) calibrate the sensors (if necessary and you should read the hints below the RHS picture or Help), (b) edit the data (either insert comments with a prefix # or delete wrong data), (c) add GPS data which consist of latitutde (Lat), longitude (Lon), altitude (Alt) and speed and (d) take photos. Before adding GPS data, you need to enable the GPS device (if available in your smart phone or tablet) by checking its status. Under the Automatic Measure mode, the GPS data will be automatically stamped into the log record immediately after each automatic measurement.
(3) At the upper right corner menu, you may (a) plot graphs (with zooming of scales) for your recorded data, (b) draw Google maps (if GPS data recorded), (c) recover old data, (d) preview files, (e) save and (f) share data and graphs/photos. The data recorded by this logger is stored in a file with an extension of .log which includes system commands (as indicated with a leading # sign) or data (as indicated with a leading clock time in the format of hh:mm:ss> and given with the usual symbols and units for the data) while the exported graph data (.txt) will get rid of all those commands and comments (with time given in seconds) for further data analysis by any spreadsheet programme. Remember not to delete or modify the system-generated comments, especially the first line and those with date information. There are some sample data files on air pressure (e.g. hato_airpressure.log for typhonn Hato recorded during 22-23 August 2017) or PM2.5 available to plot graphs or draw Google maps (gps_*.log with GPS data). You may use or just look at them by selecting the Open item in the right top menu.
(4) If there are many data recorded for plotting graphs or drawing Google maps, you may take average (⊕ encircled + sign) of them over a given period of time for graphs (usually around 30-1000s) or a given distance of space for Google maps (usually within 20-500m).
(5) In case of accidental loss of Bluetooth connection, you can try to re-connect it (usually a few attempts needed). If you close and re-start the App, the old data may usually be recovered.
Even without Bluetooth connection to any mobile logger, you may click the right top menu to (a) preview files (including log records *.log, graph data *.txt, graphs and photos *.jpg), (b) plot graphs and (c) draw Google maps (if GPS data collected) for existing log records.
For SESlogger7 version, it further supports (a) direct cable connection via the USB (or OTG) ports of the logger and your smart phone or tablet; and (b) Wi-Fi version of the logger and Internet access (if the logger is connected to a computer via Bluetooth, USB cable or WiFi using the SESlogger software below).
Desktop and Notebook Computer Version of SESlogger software
An equivalent software (most features but not all feature of the Android app) is available for mainframe, workstation, desktop, laptop, notebook or netbook computers with the following format:
- java version - SESlogger.jar for cross computer platforms (including Windows, Linux, Unix and MacOS etc.) installed with the java software. You may double click on its icon or run it in a terminal with the command:
java -jar SESlogger.jar
- Windows version - SESlogger-XX.exe for installation in 64-bit Windows-based computer (with or without the java software).
The layout and functions of both are identical and they can further provide server service for online or remote access of the mobile logger when the computer is connected to the device by USB cable, WiFi or Bluetooth, rendering the mobile logger to function as an IoT device.
