icof

in case of fire

Due to the ongoing global pandemic I started to work mostly from home.
Beside my job as a software engineer I am also a volunteer firefighter in my local community.
This means that I’m on call for emergencies 24/7, also during my daily work as a SE.
When I am in the office and get a call, I can speak to my colleagues in seconds that I have to go (Or they just see me running to my car).
In booth cases they are informed that I am afk and can probably re-schedule or take over meetings for me.
When working from home I want to send an absence notification to my colleagues.
Chatting my 2-4 colleagues can be time-consuming.
Well, I am an engineer. I can automate this in combination with a big red button. I like big red buttons.

gocrazy installation

First you need to plug-in the Pi SD card into your PC. If you have already installed an OS like raspbian on this SD card, I recommend flashing it.
With the fdisk utility you can delete all existing partitions.

Now you can follow the go-krazy installation guide: https://github.com/gokrazy/gokrazy#installation

You can update your gokrazy installation via the web endpoint:

gokr-packer -update yes -hostname 192.168.178.49 -serial_console=disabled ./cmd/icof-cmd

Configuration

To run icof on gokrazy you have to create a startup configuration and place it in the following directory on the permanent data partition of your gocrazy installation: /perm/icof/start-config.json.

Configuration:

{
  "email_config": {
    "host": "",
    "port": 0,
    "username": "",
    "password": "",
    "from_email_address": ""
  },
  "email_receiver_config": {
    "alert_subject": "",
    "resolve_subject": "",
    "receivers": [
      {
        "name": "",
        "alert_template_message": "",
        "resolve_template_message": "",
        "addresses": [
          {
            "email": "",
            "name": "",
            "surname": ""
          }
        ]
      }
    ]
  }
}

Circuit

The circuit uses a pull down resistor. This will pull down the input signal at the GPIO pin to LOW if the switch is pressed and the power circuit is interrupted.

• Emergency switch is wired in NC (normally closed).
• A 10kΩ resistor is used
• 3,3V power pin is enough

Shopping List

• A raspberry pi 3 B+ or 4 (choose whats curently available) https://www.amazon.de/s?k=raspberry+pi&__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&