You know that feeling when you're on a Discord call, you don't want to be disturbed, but someone constantly feels the need to come and disturb you? This simple project can put you out of your misery.

To detect room entry, you place a Raspberry Pi Zero with an ultrasonic sensor above the door. Whenever the door closes/opens, the Raspberry sends a message to the MQTT broker (itself). The desktop client then responds to this message by virtually pressing the mute/unmute key.

• top button
  • used to initialize pairing with client (lasts 30 seconds)
  • client waits for server to send pairing packet
• middle button
  • on/off
• bottom button
  • shuts down Raspberry Pi

sudo apt update
sudo apt upgrade
sudo systemctl enable mosquitto

In /etc/mosquitto/mosquitto.conf make the following changes:

listener 1883 0.0.0.0
allow_anonymous true

Then restart MQTT server:

sudo systemctl restart mosquitto

cd your_download_folder   # optional
git clone https://github.com/jsfraz/i-hate-doors.git
cp -r i-hate-doors/i_hate_doors_server your_desired_folder   # optional
cd your_desired_folder/i_hate_doors_server
pip3 install -r requirements.txt    # installing python libraries

Create new file /etc/systemd/system/ihatedoors.service and paste the following (don't forget to modify the path):

[Unit]
Description=I hate doors
After=multi-user.target

[Service]
Type=simple
ExecStart=python3 your_desired_folder/i_hate_doors_server/main.py
Restart=on-abort

[Install]
WantedBy=multi-user.target

Then reload the daemon, enable and start the service:

sudo systemctl daemon-reload
sudo systemctl enable ihatedoors.service
sudo systemctl start ihatedoors.service

• release client executable
• power from lithium battery
• create PCB and 3D print case
• MQTT security

This is intended for home use, communication with the MQTT server is not encrypted in any way.