thijstriemstra

# 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

yasamoka

# inspired by cncjs-pendant-raspi-gpio: https://github.com/cncjs/cncjs-pendant-raspi-gpio
# This CNC.js pendant opens a connection to the CNC.js web server, opens a serial port connection,
# writes a command, then terminates.

import jwt
import logging
from socketIO_client import SocketIO, LoggingNamespace

SERVER_ADDRESS = "localhost"
SERVER_PORT = 8000

boneskull

These are example files from the tutorial by @boneskull as seen on Get on The Good Foot with MicroPython on the ESP32, Part 2

tobozo

/*
 * 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

projetsdiy

# Scanner i2c en MicroPython | MicroPython i2c scanner
# Renvoi l'adresse en decimal et hexa de chaque device connecte sur le bus i2c
# Return decimal and hexa adress of each i2c device
# https://projetsdiy.fr - https://diyprojects.io (dec. 2017)

import machine
i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4))

print('Scan i2c bus...')
devices = i2c.scan()

makenova

Install ImageMagick from source on Ubuntu 14.04

Note

These notes were for a job I am no longer at and are very dated. Please go to the imagemagick website for updated instructions.

The version of ImageMagick that is installed when you run apt-get install imagemagick on Ubuntu 14.04 is older than I would like.

$ convert --version

savetheclocktower

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.

hfreire

#!/bin/sh

SOC_USB=/sys/devices/platform/soc/20980000.usb

if [ ! -d $SOC_USB ];
  then
    SOC_USB=/sys/devices/platform/soc/3f980000.usb # Raspberry Pi 3
fi

BUSPOWER=$SOC_USB/buspower

application2000

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 && \

RamonGilabert

#!/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