This python3 code provides some basic functionality for data acquisition and visualisation like data logger, bar-chart, XY- or oscilloscope display and data recording on disk.
In addition to the GPIO inputs/outputs of the Raspberry Pi, the analog-to-digital converters ADS1115 and MCP3008 and PicoScope USB-oscilloscopes are supported as input devices for analog data, as well as a number of digital sensors using protocols like I²C or SPI.
This graphical user interface helps manage configuration options and can be used to start data collection. The configurations and generated data files are stored in a dedicated sub-directory in $HOME/PhyPi. The respective file names are derived from a user-defined day and the current date and time.
In the tab Control, the main configuration file of the type .daq is set - the default is
$HOME/PhyPi/ phypi.daq. This file specifies at least one additional configuration file containing the configuration for the sensor or ADC used (hereafter referred to as 'Device'). Furthermore, the working directory (default $HOME/PhyPi/) and a tag for the measurement project can be specified in this tab.
With the Start button we start the script run_phypi.py, which controls the data acquisition.
The Configuration tab displays the content of the configuration files, which and can be edited and saved after activating the EditMode button. The file name used for the main configuration is the name set in the Control tab as the tag; the names for the device configuration files are the file names specified in the main configuration, including any given file paths.
The tab Help/Hilfe gives instructions for use in English or German language.