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Setup for ARM

The following guide is on how to setup WhistleDetector on a fresh Ubuntu installation for ARM (Odroid C2).

Install OS

Download the latest official release (minimal version) from here. You can also try Armbian or any other image, but this guide focuses on the official one.

Flash the image using e.g. Etcher.

Login locally or via SSH and update the system. Credentials are root / odroid.

sudo apt update
sudo apt upgrade

Add your user if it doesn't exist already.

sudo adduser chrizbee sudo
sudo usermod -aG sudo,audio chrizbee

Note: After this login as chrizbee and perform every action with this user!

Install dependencies

To build this application, you will need Qt5, QtMultimedia, Qt5Network and xtensor-fftw.

I wasn't able to use Alsa with the official Qt-Mulimedia packages since they were built with only one audio backend - which happens to be pulseaudio.

sudo apt install qt5-default qtmultimedia5-dev libqt5multimedia5-plugins pulseaudio git build-essential cmake libfftw3-dev

Enable the pulseaudio service and reboot.

systemctl --user enable pulseaudio

Set the default pulseaudio source.

pacmd list-sources # Remember the index
pacmd set-default-source <index>

The best way to install xtensor-fftw and its dependencies is by using conda. You don't need to automatically initialize by running conda init. Instead just export CONDA_PREFIX on startup.

wget https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-Linux-aarch64.sh
bash Miniforge3-Linux-aarch64.sh

Append the following line to ~/.bashrc.

# Miniconda Path
export CONDA_PREFIX=/home/chrizbee/miniforge3
export PATH=$PATH:$CONDA_PREFIX/bin

Reboot and install xtensor-fftw with its dependencies.

conda install -c conda-forge xtensor-fftw

Install WhistleDetector

Clone the GitHub repository.

git clone https://github.com/chrizbee/WhistleDetector
cd WhistleDetector

Build it using cmake. Make sure CONDA_PREFIX is set before building.

mkdir build
cd build
cmake ..
cmake --build . [-- -j4]

Edit config.ini to use your own configuration and MQTT topics.

nano WhistleDetector/config.ini

Create and enable a systemd service.

sudo nano /etc/systemd/user/whistledetector.service
[Unit]
Description=WhistleDetector
After=network.target pulseaudio.service
Requires=pulseaudio.service
StartLimitIntervalSec=0

[Service]
Type=simple
Restart=always
RestartSec=1
ExecStart=/home/chrizbee/WhistleDetector/build/WhistleDetector/WhistleDetector

[Install]
WantedBy=default.target
systemctl --user enable whistledetector

Autologin as user chrizbee to start whistledetector.service automatically. You could also setup the whole guide systemwide, but it's not recommended to run pulseaudio systemwide.

See: https://forum.armbian.com/topic/1903-autologin-to-armbian-console/