msvana / temperature-logger

Reads temperature from Arduino, stores it in a database and plots it

TempLogger

TempLogger reads temperature from a sensor attached to an Arduino board. It writes it into an SQLite database. Temperature history can be viewed in a simple web application.

How to use

Setting up Arduino

Compile and upload the code from ./src/temperature.ino to your Arduino board in Arduino IDE. The code is designed to work with the TMP36 temperature sensor and input voltage of 5V. The sensor output should be attached to the A0 pin. Arduino writes the temperature to the serial port.

Python environment

In this project I use Rye package manager. After installing it you can run

$ rye sync

to create a virtual environment for the project.

Logger

Logger is responsible for reading the temperature from a serial port and storing it in a database. You can start it like this:

$ rye run src/temp_logger/logger.py {path-to-serial-port} {path-to-database}

On Ubuntu 22.04 and Fedora 38, the serial port path was /dev/ttyACM0. Make sure that you can read data from this device. On both Ubuntu and Fedora I achieved this by adding the user to the dialup group.

Web interface

You can start the web interface like this:

$ rye run src/temp_logger/web.py

This will start the web interface showing a temperature graph at port 5000. I use Quart - an async version of Flask to implement the web interface.