2.1 KiB
Hydrophonitor
A software package to record audio and related metadata from a configuration of hydrophones.
Overview
| Module | Description |
|---|---|
| audio-logger | Receive an audio signal from the DAC and write it on disk in .wav format. |
| gps-logger | Record position and time of the device in .csv format. |
| depth-logger | Record depth of the device and save it in .csv format. |
| *lcd-display | Provide information on the device's LCD screen |
| *device-controls | Provide device control using physical buttons. |
Data Formats
Type | Output file format | Output file name | Output structure | Content
------------|--------------------|--------------------------------------|------------------|
Audio Data | .wav | _audio.wav | Each recorded chunk will be written to its own file in audio folder | Wav audio data, configuration defined in XXX
GPS Data | .csv | _gps.wav | All data written to a single file | Csv data with following fields: GPS time UTC, latitude, longitude, speed, satellites in view
Depth data | .csv | _depth.wav | All data written to a single file | Csv data with following fields: date and time, voltage of depth sensor (V), depth (m)
Log data | .txt | _log.txt | All data written to a single file | Text file where each entry contains the following: date and time, process that writes the entry, logged information
Output Locations
The base location/path for the output directories is defined by a configurable value BASE_DIR_PATH. If directories along this path do not exist, they will be created. If an error occurs or the location is not writable, output will be written to the default location () instead.
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A recording session starts when the Raspberry Pi is turned on or booted, and ends on shutdown. Each session will have its output written in its own directory that will be named _recordings.