A python script that is listening to a GPIO pin of a RPI. Attached is a simple microphone which just returns a 1 if there is no noise and a 0 if there is a noise.
The data is collected in a sort of sliding window of like 30 entries. It sort of looks like 111111111111001111110000111111111...
This data is directly published to an MQTT broker (https://nanomq.io) to the topic sensor/noise using paho-mqtt.
Clone the repo. Have Python 3 installed as well as the Paho MQTT dependency.
sudo pip3 install paho-mqtt
Supervisord is used to permanently run the python script in background.
Create a config file which is located at /etc/supervisor/conf.d/noise-sniffer.conf.
Add the following content:
[program:noisesniffer]
command = /usr/bin/python3 /home/someuser/noise-sniffer/noise_sniffer.py
directory = /home/someuser/noise-sniffer
user = someuser
environment=HOME="/home/someuser", USER="someuser"
sudo supervisorctl start noisesniffer
sudo supervisorctl stop noisesniffer
python3 noise_sniffer.py
The noise_sniffer_flask.py is deprecated and not longer used.