casebeer

'''
Generate DHCP Option 121 hex routing configurations

Static routes pushed over DHCP

1) Set option 121.
2) Value is the concatenation of hex route data.
3) Each route has the form:
	{prefix_length}{destination_prefix}{router}

casebeer

def consumer(func):
	'''
	Decorator taking care of initial next() call to "sending" generators

	From PEP-342
	http://www.python.org/dev/peps/pep-0342/
	'''
	def wrapper(*args,**kw):
		gen = func(*args, **kw)
		next(gen)

casebeer

#!/bin/bash

#
# Start Django and Celery, trapping SIGINT to terminate both daemons cleanly on Ctrl-C
#

PYTHON=venv/bin/python
DJANGO_DEV_SERVER_PORT=8000

$PYTHON ./manage.py runserver $DJANGO_DEV_SERVER_PORT "$@" &

casebeer

Last updated: 2017-03-18

Searching for Files

Find images in a directory that don't have a DateTimeOriginal

exiftool -filename -filemodifydate -createdate -r -if '(not $datetimeoriginal) and $filetype eq "JPEG"' .

###Output photos that don't have datetimeoriginal to a CSV### Note this can take a long time if you have a lot of jpgs

casebeer

'''
TUF-2000m 

Module to test TUF-2000m ultrasonic flow meter
via a Modbus RTU to Modbus TCP bridge (eByte NA111-A)

'''
import csv
import sys
import os

casebeer

'''
 # Parse ffprobe keyframe output

 Run with 

     ffprobe -loglevel error -show_entries packet=pts_time,flags -of csv=print_section=0 -i <input file or stream> | python kf.py

 See  https://stackoverflow.com/a/18088156

'''

casebeer

# 
# # REST Switch configs for toggling the white "Supplemental Lights" on Hikvision/Annke cameras
#
# Note that we must hit the cameras' ISAPI endpoints directly, not through the NVR,
# since (at least the Annke N88PCH) NVR does not seem to support getting nor setting the 
# `/ISAPI/Image/channels/<ID>/supplmentalLight` API endpoint. This also implies that
# we must use the NVR's "integration password," i.e. the username and password used by the
# NVR to automatically config the cameras, NOT a user of the NVR itself. 
#
# ## Camera Settings

casebeer

network:
  version: 2
  renderer: networkd
  ethernets:
    mvlan-bridge:
      addresses:
        - 192.168.0.10/32
      routes:
        - to: 192.168.0.128/28 # docker macvlan address range
          via: 192.168.0.10

casebeer

type: picture-elements
title: Hik PTZ Control
elements:
  - type: icon
    icon: mdi:arrow-up
    tap_action:
      action: call-service
      service: rest_command.hik_ptz_up
    hold_action:
      action: call-service

casebeer

Random normal variables in Home Assistant/Jinja

Via Iwrin-Hall/uniform sum distribution.

μ = n / 2, σ = sqrt(n / 12)

where n = # of summed uniform U(0, 1) random variables

Scale and shift Irwin-Hall to provide μ and σ as needed.