BabySpiCroft-Setup-Files

Check out this blog post for more background and details about this project!

If you are skipping the smart speaker functionality and just want the baby monitor on a Raspberry Pi, skip ahead to Install Dependencies

Set up Picroft

Start with Picroft image burned on to SD Card

Set up Wi-Fi

Add wpa_supplicant.conf file to the /boot folder on the SD card to enable headless connection to your wifi

Turn on the Pi and setup Picroft

• Plug it in, turn it on, and let it boot. Then connect via ssh: ssh pi@<your-raspberry-pi-ip-address>. The default password is mycroft
• Enable the camera interface with sudo raspi-config
• Run through the install prompts, choose the 3.5mm audio output option (unless you’re doing something different). For the microphone, select USB. Dont worry about configuring the mic just yet. Once through the setup, proceed.

Install Dependencies

Run sudo apt update

GStreamer

sudo apt install -y gstreamer1.0-tools gstreamer1.0-plugins-bad gstreamer1.0-plugins-good gstreamer1.0-alsa
sudo apt install autoconf automake libtool pkg-config libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libraspberrypi-dev
git clone https://github.com/thaytan/gst-rpicamsrc.git
cd gst-rpicamsrc
./autogen.sh --prefix=/usr --libdir=/usr/lib/arm-linux-gnueabihf/
make
sudo make install
cd ..

Janus

sudo apt install libmicrohttpd-dev libjansson-dev \
  libssl-dev libsrtp-dev libsofia-sip-ua-dev libglib2.0-dev \
  libopus-dev libogg-dev libcurl4-openssl-dev liblua5.3-dev \
  libconfig-dev pkg-config gengetopt libtool automake

Install libnice

If you are not using the Picroft image:

sudo apt install git python3-pip
sudo pip3 install meson
sudo apt install -y ninja-build

If you are using the Picroft image:

pip3 install meson
sudo apt install -y ninja-build

then

git clone https://gitlab.freedesktop.org/libnice/libnice
cd libnice
meson --prefix=/usr build && ninja -C build && sudo ninja -C build install
cd ..

Install newer version of libsrtp

wget https://github.com/cisco/libsrtp/archive/v2.2.0.tar.gz
tar xfv v2.2.0.tar.gz
cd libsrtp-2.2.0
sudo apt install openssl
./configure --prefix=/usr --enable-openssl
make shared_library && sudo make install
cd ..

Install Janus

git clone https://github.com/meetecho/janus-gateway.git
cd janus-gateway
sh autogen.sh
./configure --prefix=/opt/janus --disable-websockets --disable-rabbitmq --disable-mqtt --disable-data-channels
make
sudo make install
sudo make configs
cd ..

Final setup

Clone this project:

git clone https://github.com/jhthompson12/BabySpiCroft-Setup-Files.git
cd BabySpiCroft-Setup-Files

Transfer Alsa configuration file and set up the microphone:

sudo cp Microphone/asound.conf /etc/

Add the “listener” setting to .config/mycroft/mycroft.conf so that it looks something like this (just add the "listener" part, don’t change anything else in this file):

{
  "max_allowed_core_version": 21.2,
  "listener": {
    "device_name": "dsnooped"
    }
}

Update Janus configuration files:

sudo cp Janus/janus.jcfg /opt/janus/etc/janus
sudo cp Janus/janus.plugin.streaming.jcfg /opt/janus/etc/janus
sudo cp Janus/janus.transport.http.jcfg /opt/janus/etc/janus
sudo cp Janus/janus.sh /opt/janus
sudo cp Janus/janus.service /etc/systemd/system

Set up the nginx web server

sudo apt install nginx
sudo cp nginx/baby-monitor-site /etc/nginx/sites-available
sudo ln -s /etc/nginx/sites-available/baby-monitor-site /etc/nginx/sites-enabled	
sudo rm /etc/nginx/sites-enabled/default
sudo systemctl restart nginx

Move stream services over for systemctl

sudo cp GStreamer/janus-stream.service /etc/systemd/system
sudo cp GStreamer/janus-stream.sh /etc

Set up certificates for https

mkdir Monitor_Website_Root/Certs
cd Monitor_Website_Root/Certs
openssl genrsa -out BabySpiCroft.key 2048
openssl req -x509 -new -nodes -key BabySpiCroft.key -sha256 -days 1825 -out BabySpiCroft.pem
cd ~

You will be asked a bunch of questions, you can answer them however you’d like. I responded to the Country, State, and Common Name (as “BabySpiCroft”)

Start the services

sudo systemctl restart nginx
sudo systemctl start janus.service
sudo systemctl start janus-stream.service

Test it out

If everything is working properly, you should be able to open Google Chrome on your phone or computer and go to https://<your-rapsberry-pi's-IP-address>. Note, this will probably not work on Firefox or maybe even Chrome on MacOS until you install the root certificate on the connecting device.

Bonus steps:

1. Make the baby monitor services start on boot so that if there's a power outage or you reboot the baby monitor automatically runs:

sudo systemctl enable janus.service
sudo systemctl enable janus-stream.service

2. Add a service that turns off the Pi’s LEDs after boot. They’re pretty bright and distracting and this is likely going into a nursery...

sudo cp ~/BabySpiCroft-Setup-Files/Other/disable-led.service /etc/systemd/system
sudo systemctl start disable-led.service
sudo systemctl enable disable-led.service

3. Install the created root Certificate (the .pem file) on your devices to avoid the pesky "The certificate is not trusted because it is self-signed." errors that you occasionally will have to click through.