emonitor

Read, record and plot sensor data from serial devices.

This application can be configured to work with generic serial devices. It includes example configuration for a Pfeiffer MaxiGauge vacuum pressure gauge reader and a Lakeshore Model-336 temperature controller.

Install

Requires python 3.6+. Tested using Anaconda on Windows 10 and Ubuntu 16.04.

Install using setuptools.

git clone https://github.com/ad3ller/emonitor
cd ./emonitor
python setup.py install
pytest

Quick Start

The emonitor commands can be executed from a terminal (or Anaconda prompt).

Configure the sensors for a (fake) serial device called fake.

$ emonitor set fake --key sensors --value A B C

Next, create an SQLite database to store the fake data.

$ emonitor generate fake
Creating fake.db with columns ('A', 'B', 'C')

And finally, start the service.

$ emonitor run fake --output --wait 10
Starting emonitor. Use Ctrl-C to stop.

          TIMESTAMP            A            B               C
2018-05-12 13:20:44      292.7695    293.5649        293.9454
2018-05-12 13:20:54      292.9262    293.5138        293.9303
2018-05-12 13:21:04      293.0826    293.3233        294.0555
2018-05-12 13:21:14      293.1931    293.4301        294.0839

This queries the device for its sensor readings. Waits. And repeats.

To plot the recorded data in a browser using bokeh, launch another terminal and execute:

$ emonitor plot --show

Documentation

A guide to using emonitor is hosted on emonitor.readthedocs.io.

Change log

• v0.3.0, record UTC timestamps (data taken before v0.3.0 should be adjusted to UTC for accurate plotting).