breakalert project

Raspberry Pi Zero Setup

Setting up wireless networking

Source: https://www.raspberrypi.org/documentation/configuration/wireless/headless.md
Put this file onto the boot partition of the SD card wpa_supplicant.conf.
⚠️ 5G wireless does not work!
⚠️ The file needs to have LF line breaks!

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=IE

network={
 ssid="<Name of your wireless LAN>"
 psk="<Password for your wireless LAN>"
}

Setting up more than one wireless network

Source: https://raspberrypi.stackexchange.com/questions/11631/how-to-setup-multiple-wifi-networks

Edit /etc/wpa_supplicant/wpa_supplicant.conf and add id_str="home" under the schools wpa info and id_str="work". :warning: The file needs to have LF line breaks!

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=IE

network={
    ssid="HOME NETWORK NAME"
    psk="HOME PASSWORD"
    id_str="home"
}

network={
    ssid="WORK NETWORK NAME"
    psk="WORK PASSWORD"
    id_str="work"
}

Enable SSH on a headless Raspberry Pi (add file to SD card on another machine)

Source: https://www.raspberrypi.org/documentation/remote-access/ssh/README.md
For headless setup, SSH can be enabled by placing a file named ssh, without any extension, onto the boot partition of the SD card from another computer. The content of the file does not matter; it could contain text, or nothing at all.

Password-less SSH access

ssh-copy-id -i ~/.ssh/id_rsa.pub pi@192.168.1.10

Configure I2C

Type sudo raspi-config

Choose interface

Enable i2c

TMUX

• tmux cheatsheet
• tmux cheatsheet b/w

Software

How to install dependencies

Look at the Makefile file.

Run app

Windows

cd breakalert
REM Set PYTHONPATH
set PYTHONPATH=.
REM Run app using python from ven
.\venv\Scripts\python.exe main.py

Linux

sudo apt-get install python3-venv
cd breakalert
python -m venv venv
./venv/bin/python main.py

Run unit tests

Run command from the root directory:

  pytest

Get coverage report

Activate venv and run the following commands:

    (venv) C:\git\python\breakalert>coverage run -m pytest
    (venv) C:\git\python\breakalert>coverage html

TODO

• Update/restore get_distance method by adding while loop and not returning None(s)
• Remove color enum
• Fix IP address light brightness
• Add workflow to generate plantuml files
• Go back to idle when Workstate was very short. For example <5min
• Add movement detection for Distant Threshold Detection Strategy
  • when probability 1.0, normalize distance values and check how the distance has been changed
• Statistics (how much time in front of computer in total so far during the day)
• Last 3 LEDs to count break time
• Add standby mode (turn off Idle light)
• Add AlertState
• Unify light config

Components

Configuration

Cancelable repetitive task

Note	Link
Cancelable repetitive task	https://stackoverflow.com/questions/22498038/improve-current-implementation-of-a-setinterval/22498708#22498708
metronome like ticks	https://stackoverflow.com/a/25251804/4279

Platform	Shell	Command to activate virtual environment
POSIX	bash/zsh	$ source <venv>/bin/activate
	fish	$ source <venv>/bin/activate.fish
	csh/tcsh	$ source <venv>/bin/activate.csh
	PowerShell	$ <venv>/bin/Activate.ps1
Windows	cmd.exe	C:\> <venv>\Scripts\activate.bat
	PowerShell	PS C:\> <venv>\Scripts\Activate.ps1