Temperatures plotter

Description

My preferred way to measure and graph temperatures. Works for me (tm).

In this particular case, I use ESP8266 hardware with DS18B20s attached temperature sensor.

Temperature values are logged in the database and plotted from that data.

Hardware

Adafruit Feather Huzzah (ESP8266)
Dallas Temperature sensors (DS18B20s)

Huzzah is running a web server and query returns a current temperature in celsius.

Rationale

KISS (Keep It Simple Stupid)
ELK and Prometheus + Grafana are a tad overkill for my needs
Easy to deploy (what's easy then, eh?)

Requirements

Something that generates data (here: temperature sensor)
Python 3
Moreover, see requirements.txt

Installation and configuration

mkdir -p $HOME/apps/temperatures && python3 -m venv $HOME/apps/temperatures

cd $_ && . bin/activate

pip3 install -r requirements.txt

./plotting.py temperatures.conf

Caveats

Graph colors are a bit turdy. I really wanted to have all the plots in the same figure and only occasionally give attention to air pressure. That's why air pressure has so diluted color.