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simont77 /
Last active May 14, 2022 — forked from gomfunkel/
Elgato Eve HomeKit Services & Characteristics

Elgato Eve HomeKit Services & Characteristics

A work in progress collection of proprietary and as of yet undocumented HomeKit characteristics and their UUIDs used by Elgato Eve.

Based on the work by gomfunkel and 0ff. Characteristics and data dump for Door, Motion and Thermo thanks to @NebzHB.

More infos not yet incorporated in the comment section.

This list is not including all Eve accessories available and some services and characteristics still make no sense to me. If you have anything to contribute, please leave a comment. There is no guarantee that the information listed below is correct.

savetheclocktower /
Last active Mar 3, 2022
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.

sergejmueller / index.html
Last active Dec 14, 2021
Embedded Google Analytics: Fix “Leverage Browser Caching” Warning on Nginx
View index.html
<!-- ... -->
<!-- Embed analytics.js as local file -->
<script src="/analytics.js"></script>
gbaman /
Last active May 12, 2022
Simple guide for setting up OTG modes on the Raspberry Pi Zero

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

jj1bdx /
Last active Feb 13, 2021
Installing 8bit AVR development kit from macOS HomeBrew and FreeBSD Ports with the optiboot environment

AVR 8bit HomeBrew installation for OS X

umask 022
brew tap osx-cross/avr
# removal needed before upgrading
brew remove avr-gcc avr-binutils avr-libc
# avr-libc is now included in avr-gcc
brew install avr-gcc avr-binutils
yuvadm /
Last active Sep 15, 2020
rtl_fm demodulation guide
# rtl_fm demodulation guide
# based on excerpts from:
# requires rtl-sdr (rtl_fm bundled), sox for audio, multimon for pager decoding
# broadcast FM radio
rtl_fm -W -f 89.1M | play -r 32k -t raw -e signed-integer -b 16 -c 1 -V1 -
# police scanner
rtl_fm -N -E -f 154.42M -f 154.75M -f 154.82M -f 154.89M -s 12k -o 4 -g 49.2 -l 70 | play -r 12k ...