Thijs Triemstra thijstriemstra

## play.sh
# Playback on USB audio device (the second soundcard's first device),
# with omxplayer:
#
# $ ./play.sh myfile.mp4
#
# Use 'aplay -l' to list available devices, e.g:
#
# $ aplay -l
# card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio]
#   Subdevices: 1/1

## 0_README.md

      
              6 files
            
          
              4 forks
            
          
              2 comments
            
          
              10 stars
            
          
                Lahorde
                / 0_README.md
            
            
              Last active
              August 11, 2023 16:52
            
              
                Initialize an external I2C RTC module on raspberry using udev and systemd
              
          
    Description

Enable i2c RTC using systemd.
A udev rules triggers an I2C systemd service on I2C kernel module adding.
Service then loads I2C driver adding a new I2C device to /sys
Then kernel loads I2C RTC driver and adds an RTC device
It triggers a udev rules that updates hardware clock
Application on raspberry pi

Enable I2C


enable I2C in config.txt, adding device_tree_param=i2c1=on


## jinja2_file_less.py
#!/usr/bin/env/python
#
# More of a reference of using jinaj2 without actual template files.
# This is great for a simple output transformation to standard out.
#
# Of course you will need to "sudo pip install jinja2" first!
#
# I like to refer to the following to remember how to use jinja2 :)
# http://jinja.pocoo.org/docs/templates/
#

## ESP32_SSD1306_TCA_MULTIPLEXER.ino
/*
 * Multiplexed SSD1306 Demo
 * Copyright © 2018-01-02 tobozo
 *
 * https://github.com/tobozo
 * https://twitter.com/tobozotagada
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the “Software”), to deal in
 * the Software without restriction, including without limitation the rights to

## bluetooth.sh
#!/usr/bin/expect -f

set prompt "#"
set address [lindex $argv 0]

spawn sudo bluetoothctl -a
expect -re $prompt
send "remove $address\r"
sleep 1
expect -re $prompt

## check_throttle.sh
#!/bin/bash
# This bash script outputs the status of your Pi and checks whether you are being throttled for undervoltage and gives you your temperature
# Article and discussion at https://jamesachambers.com/measure-raspberry-pi-undervoltage-true-clock-speeds/
# Author James A Chambers 6-6-17

# Output current configuration
vcgencmd get_config int | egrep "(arm|core|gpu|sdram)_freq|over_volt"

# Measure clock speeds
for src in arm core h264 isp v3d; do echo -e "$src:\t$(vcgencmd measure_clock $src)"; done

## how-to-install-latest-gcc-on-ubuntu-lts.txt
These commands are based on a askubuntu answer http://askubuntu.com/a/581497
To install gcc-6 (gcc-6.1.1), I had to do more stuff as shown below.
USE THOSE COMMANDS AT YOUR OWN RISK. I SHALL NOT BE RESPONSIBLE FOR ANYTHING.
ABSOLUTELY NO WARRANTY.

If you are still reading let's carry on with the code.

sudo apt-get update && \
sudo apt-get install build-essential software-properties-common -y && \
sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y && \

## hourly_price_charts.yaml
- type: custom:apexcharts-card
  graph_span: 1d
  header:
    show: true
    title: Electriciteitsprijzen Vandaag (€/kwh)
  span:
    start: day
  now:
    show: true
    label: Now

## README.md

      
              3 files
            
          
              17 forks
            
          
              48 comments
            
          
              79 stars
            
          
                savetheclocktower
                / README.md
            
            
              Last active
              April 29, 2024 03:03
            
              
                Using a rotary encoder as a volume control for the Raspberry Pi
              
          
    Using a rotary encoder as a volume control

On my RetroPie machine I wanted a hardware volume knob — the games I play use a handful of emulators, and there's no unified software interface for controlling the volume. The speakers I got for my cabinet are great, but don't have their own hardware volume knob. So with a bunch of googling and trial and error, I figured out what I need to pull this off: a rotary encoder and a daemon that listens for the signals it sends.
Rotary encoder

A rotary encoder is like the standard potentiometer (i.e., analog volume knob) we all know, except (a) you can keep turning it in either direction for as long as you want, and thus (b) it talks to the RPi differently than a potentiometer would.
I picked up this one from Adafruit, but there are plenty others available. This rotary encoder also lets you push the knob in and treats that like a button press, so I figured that would be useful for toggling mute on and off.

  
## gist:6b7d42030e264a135450ecc0ba521bd8
### WARNING: READ CAREFULLY BEFORE ATTEMPTING ###
#
# Officially, this is not recommended. YMMV
# https://www.raspberrypi.com/news/bookworm-the-new-version-of-raspberry-pi-os/
#
# This mostly works if you are on 64bit. You are on your own if you are on 32bit or mixed 64/32bit
#
# Credit to anfractuosity and fgimenezm for figuring out additional details for kernels
#
	# Playback on USB audio device (the second soundcard's first device),
	# with omxplayer:
	#
	# $ ./play.sh myfile.mp4
	#
	# Use 'aplay -l' to list available devices, e.g:
	#
	# $ aplay -l
	# card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio]
	# Subdevices: 1/1
	#!/usr/bin/env/python
	#
	# More of a reference of using jinaj2 without actual template files.
	# This is great for a simple output transformation to standard out.
	#
	# Of course you will need to "sudo pip install jinja2" first!
	#
	# I like to refer to the following to remember how to use jinja2 :)
	# http://jinja.pocoo.org/docs/templates/
	#
	/*
	* Multiplexed SSD1306 Demo
	* Copyright © 2018-01-02 tobozo
	*
	* https://github.com/tobozo
	* https://twitter.com/tobozotagada
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy of
	* this software and associated documentation files (the “Software”), to deal in
	* the Software without restriction, including without limitation the rights to
	#!/usr/bin/expect -f

	set prompt "#"
	set address [lindex $argv 0]

	spawn sudo bluetoothctl -a
	expect -re $prompt
	send "remove $address\r"
	sleep 1
	expect -re $prompt
	#!/bin/bash
	# This bash script outputs the status of your Pi and checks whether you are being throttled for undervoltage and gives you your temperature
	# Article and discussion at https://jamesachambers.com/measure-raspberry-pi-undervoltage-true-clock-speeds/
	# Author James A Chambers 6-6-17

	# Output current configuration
	vcgencmd get_config int \| egrep "(arm\|core\|gpu\|sdram)_freq\|over_volt"

	# Measure clock speeds
	for src in arm core h264 isp v3d; do echo -e "$src:\t$(vcgencmd measure_clock $src)"; done
	These commands are based on a askubuntu answer http://askubuntu.com/a/581497
	To install gcc-6 (gcc-6.1.1), I had to do more stuff as shown below.
	USE THOSE COMMANDS AT YOUR OWN RISK. I SHALL NOT BE RESPONSIBLE FOR ANYTHING.
	ABSOLUTELY NO WARRANTY.

	If you are still reading let's carry on with the code.

	sudo apt-get update && \
	sudo apt-get install build-essential software-properties-common -y && \
	sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y && \
	- type: custom:apexcharts-card
	graph_span: 1d
	header:
	show: true
	title: Electriciteitsprijzen Vandaag (€/kwh)
	span:
	start: day
	now:
	show: true
	label: Now
	### WARNING: READ CAREFULLY BEFORE ATTEMPTING ###
	#
	# Officially, this is not recommended. YMMV
	# https://www.raspberrypi.com/news/bookworm-the-new-version-of-raspberry-pi-os/
	#
	# This mostly works if you are on 64bit. You are on your own if you are on 32bit or mixed 64/32bit
	#
	# Credit to anfractuosity and fgimenezm for figuring out additional details for kernels
	#