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Hippasos plays preconfigured sound files upon reception of predefined mqtt messages.

Project description

Πηααος [1] (Hippasos) plays preconfigured sound files upon reception of predefined mqtt messages.

Pelops Overview <figcaption>

Pelops Overview


Hippasos is part of the collection of mqtt based microservices pelops. An overview on the microservice architecture and examples can be found at (

For Users

Installation Core-Functionality

Prerequisites for the core functionality are:

sudo apt install python3 python3-pip python3-pygame
sudo pip3 install paho-mqtt pyyaml pygame pelops

Install via pip:

sudo pip3 install epidaurus

To update to the latest version add --upgrade as prefix to the pip3 line above.

Install via gitlab (might need additional packages):

git clone
cd hippasos
sudo python3 install

This will install the following shell scripts: * hippasoss

The script cli arguments are: * ‘-c’/’–config’ - config file (mandatory) * ‘-v’ - verbose output (optional) * ‘–version’ - show the version number and exit


A yaml [2] file must contain four root blocks: * mqtt - mqtt-address, mqtt-port, and path to credentials file credentials-file (a file consisting of two entries: mqtt-user, mqtt-password) * logger - which log level and which file to be used
* sound-mappings - list of sound events
    mqtt-address: localhost
    mqtt-port: 1883
    credentials-file: ~/credentials.yaml
    log-level: WARNING

    log-level: DEBUG
    log-file: hippasos.log

    - name: bell_building  # unique name for sound event
      sound-file: ../resources/church_bell.ogg  # uri to sound file. must be ogg or wav.
      topic-sub: /test/button1  # react to published values on this channel
      message-value: PRESSED  # react to this message content
      volume: 0.1  # 0..1 - volume relative to system volume
      active: True  # entry ignored if set to False


  • add systemd example.

For Developers

Getting Started

The project consists of two main modules: * soundservice - Creates, starts and stops sound events. * soundevent - Subscribes to a topic and plays a sound file upon reception of a specific message.


  • Make maximum number of parallel playable sound configurable.


The code is written for python3 (and tested with python 3.5 on an Raspberry Pi Zero with Raspbian Stretch).

Merge requests / bug reports are always welcome.

Project details

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Hippasos-0.1.7.tar.gz (5.4 kB view hashes)

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