119 lines
4.1 KiB
Markdown
119 lines
4.1 KiB
Markdown
Dog Trainer
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===========
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A device that allows dogs to speak. Click on the picture to see the video with the `dog-trainer` in action
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[](https://peertube.virtonline.eu/w/hjq33b6N4GuXWMe45GYTtA)
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Hardware
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--------
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- Raspberry pi (any version with an USB port) e.g. [Raspberry Pi Model B+](https://hackerboards.com/board/raspberry-pi-foundation-raspberry-pi-model-b-plus)
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- Buttons connected to the Raspberry pi GPIO as shown in the schema to debounce noisy contacts
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- USB speaker with a microphone e.g. [Jabra Speak 410](https://www.jabra.com/_/media/Jabra_VXi_Product-Documentation/Jabra-SPEAK-410-Series/technical-specifications/RevB/Jabra-Speak-410-Techsheet-A4-290420-Web.pdf) or [Codec Zero](https://www.raspberrypi.com/products/codec-zero/)
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- for the `Codec Zero` make follwoing changes
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> `sudo nano /boot/config.txt`
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`#dtparam=audio=on`
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`dtoverlay=rpi-codeczero`
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- microSD card 8GB
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- USB power supply 5V 500mA
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Operating system
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----------------
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Install [Raspberry Pi Imager](https://www.raspberrypi.com/news/raspberry-pi-imager-imaging-utility/) into your notebook. Launch it and choose `Raspberry Pi OS Lite` to write into the microSD card
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Power on the `Raspberry Pi` and finish the installation process. Log into its console using either:
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- ethernet/wifi from your notebook: `ssh pi@raspberrypi`
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- connected keyboard and monitor
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- serial port
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Prerequisites
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------------
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Once you are logged into the `Raspberry pi` console update your system
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> `sudo apt update`
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`sudo apt upgrade`
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Install `git`. It will be used to download the `dog-trainer`
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> `sudo apt install -y git`
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Recordings must be edited a little bit therefore some audio processing tool is needed. Install `ffmpeg` which will do the job
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> `sudo apt install -y ffmpeg`
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How to install
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--------------
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Clone the `dog-trainer` source code into your home directory
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> `cd`
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`git clone https://gitea.virtonline.eu/2HoursProject/dog-trainer.git --depth 1`
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Go into the newly created directory
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> `cd ~/dog-trainer`
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Configuration
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-------------
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Check your Raspberry pi board pin layout and make sure your buttons GPIOs match `PINS = [17, 22, 27]` from `dog-trainer.py`
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> `pinout`
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Try using default audio device for playback and recording. Edit `dog-trainer.py` and activate `PLAY_DEVICE="default"` and `REC_DEVICE="default"`
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> `nano dog-trainer.py`
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Skip to the next section `Run it!`. If either playback or recording does not work check your sound cards
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> `aplay -L | grep ^hw:CARD=`
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`arecord -L | grep ^hw:CARD=`
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Put your sound device name `"hw:Zero"` or `"hw:USB"` into the ALSA config file
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> `nano .asoundrc`
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Install the ALSA config file
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> `mv .asoundrc ~/`
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Run it!
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-------
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Just run
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> `python3 dog-trainer.py`
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Pres `Ctrl+c` to exit
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Make it a service to automaticaly start and run in the backgroud
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------------------------------------------------------
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If your `$HOME` directory is other then `/home/pi` then modify the systemd service file
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> `sed -i "s#/home/pi#$HOME#g" dog-trainer.service`
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If your username and group is other then `pi` and `pi` then also run
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> `sed -i "s#User=pi#User=$USER#" dog-trainer.service`
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`sed -i "s#Group=pi#Group=$(id -gn)#" dog-trainer.service`
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> `sed -i "s#User=pi#User=$USER#" sound-init.service`
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`sed -i "s#Group=pi#Group=$(id -gn)#" sound-init.service`
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Install the systemd service files
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> `sudo mv dog-trainer.service /etc/systemd/system/`
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`sudo mv sound-init.service /etc/systemd/system/`
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Reload systemd manager configuration
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> `sudo systemctl daemon-reload`
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Enable the `dog-trainer` service at boot time and also run it
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> `sudo systemctl enable --now dog-trainer`
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If it does not work check logs
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> `journalctl -f -u dog-trainer`
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Set volume for playback and recording
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-------------------------------------
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Launch soundcard mixer
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> `alsamixer`
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Press F6 to select a soundcard. Find your USB sound device in the list e.g. `Jabra Speak 410 USB`. Press F4 and use up/down arrow keys to set recording volume and repeat also for the playback (F3). Make sure it is not muted. Press (m) to toggle mute. Press ESC to exit.
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To preserve audio setting after the boot run
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> `sudo alsactl store` |