# Doorbell Ding Dong Ring Ring Doorbell

A doorbell chime controller for my house. Runs on a Raspberry Pi and talks to wifi Unifi G4 Doorbells.

## Setup

### Misc

Set up user account, add user to `sudo`, `adm`, `gpio` groups.

Set up wifi:

```text
$ sudo raspi-config
- System Options -> Wireless LAN -> Canada
- Enter wifi credentials
- Reboot
```

If wifi doesn't work, you're on your own.

For the watchdog to work, we need write access to `/dev/watchdog/`.

Configure `/etc/udev/rules.d/60-watchdog.rules`:

```text
KERNEL=="watchdog", MODE="0666"
```

Change the hostname:

```text
$ sudoedit /etc/hostname
$ sudoedit /etc/hosts
```

### Script

Install dependencies:

```text
$ sudo apt update
$ sudo apt install python3 python3-pip python-virtualenv python3-virtualenv supervisor python3-rpi.gpio
```

**Make sure you have at least Python 3.9 installed.**

Clone this repo:

```text
$ cd
$ git clone https://tanner@git.tannercollin.com/tanner/doorbelldingdongringringdoorbell.git
$ cd doorbelldingdongringringdoorbell/
$ virtualenv --system-site-packages -p python3 env
$ source env/bin/activate
(env) $ pip install -r requirements.txt
```

Edit settings for your setup:

```text
$ cp settings.py.example settings.py
$ vim settings.py
```

Now you can run the script to test:

```text
$ source env/bin/activate
(env) $ DEBUG=true python main.py  # no watchdog
(env) $ python main.py             # uses watchdog
```

The watchdog will activate if a doorbell is pressed. It will reboot the Pi if the script stops.

## Process management

The script is kept alive with [supervisor](https://pypi.org/project/supervisor/).

Configure `/etc/supervisor/conf.d/doorbell.conf`:

```text
[program:doorbell]
user=tanner
directory=/home/tanner/doorbelldingdongringringdoorbell
command=/home/tanner/doorbelldingdongringringdoorbell/env/bin/python -u main.py
stopasgroup=true
stopsignal=INT
autostart=true
autorestart=true
stderr_logfile=/var/log/doorbell.log
stderr_logfile_maxbytes=10MB
stdout_logfile=/var/log/doorbell.log
stdout_logfile_maxbytes=10MB
```

Then run:

```text
$ sudo supervisorctl reread; sudo supervisorctl reload
```

Script logs to /var/log/doorbell.log. Remove `-u` from the above command when you're done testing to save SD card writes.

## License

This program is free and open-source software licensed under the MIT License. Please see the `LICENSE` file for details.

That means you have the right to study, change, and distribute the software and source code to anyone and for any purpose. You deserve these rights.