This memory on the Kookaberry is a serial memory chip capable of storing 4 Megabytes of information. The number of bits it is capable of storing is actually 32 Megabits as there are 8 bits in a byte. It is the little chip just above P4 on the back of the board.
It is organised and works exactly the same as a USB flash drive and is used for both storing the MicroPython source code files and the .csv files containing the data logged by the Kookaberry when in data logging mode.
MicroPython scripts (source code) are loaded as small Python text files (name.py) onto the memory by a simple drag and drop operation when the Kookaberry is mounted as a USB drive on a computer.
The USB memory contains three folders which store various categories of files as described below. It also contains a text file that is used to store variables used in many Apps.
This folder contains all the apps that are to appear in the menu on the screen when the Kookaberry is switched on. The “>” or “/” before a folder name shows that it is a file folder one level down from the general (root) level of the drive.
This folder contains collections of routine, pre-coded, library programmes (scripts) that are accessed by many apps. [Note: App programmes contain code that is particular to the app itself]
Note that these files have the form *.mpy. They are still Python scripts but have been compressed to take up less memory space. Unlike *.py files (which are pure text files), they cannot be viewed in a normal text editor.
This folder contains the programmes which turn the Excel CSV files created during the data logging process into graphs which can be viewed in the web browser of a PC or Mac. Click on the link below to see a detailed description of this functionality and the graphs it can generate.
This file is located in the general level of the drive – the Root Directory. This is also where where data and plain text files are located.
The Kappconfig file stores very general data used across all functions such as ID, data logging interval and radio channel. These variables are set from the _config app which is always at the top of the Menu.
Files created by Kookaberry apps will also be stored in the Root Directory. As well as the Kapconfig.txt file, these include
- CSV (Excel) files containing the data measured during data logging activities (eg, count data from the CountMe app)
- Html files containing the information needed to plot CSV data onto graphs in a web browser
NOTE: Files generated by Kookaberry apps will not appear in the computer’s USB drive file directory until after the Kookaberry receiving the data exits the app is unplugged from the computer and then reconnected to a battery or the computer.
If the USB memory on a Kookaberry becomes corrupted for some reason (ie, the menu screen starts looking strange) then the drive should be formatted (ie cleaned out completely), and the folders and files copied and pasted back from a flash drive. See Tutorial: Installing Apps on your Kookaberry
Corruption of the USB memory – which is exceedingly rare – generally occurs because the USB cable is disconnected when data is being transferred.
This can be avoided by either closing the Kookaberry drive before disconnecting, or checking that it is OK to eject the USB memory by clicking the little USB memory icon at the right of Taskbar at the bottom of your Windows computer.
To format the Kookaberry drive, right click on the drive name in the browser menu (left hand screenshot below), and then click on Format . The window in the right hand screenshot will appear.
Click Start and a warning will appear. Click OK
The formatting will proceed and a popup window will advise that the operation has been completed. Close the Format window.
The Kookberry (D) drive will now be empty.