Temperature monitoring project with Raspberry Pi. This is a toy project for self education.
The project consists of a server and a client part. The server holds an sqlite database with temperature values for the clients. The clients are nodes, e.g. Raspberry Pi, that measure a temperature and (regularly) report it to the server via internet.
This is an educational project, so the server is written using the python 3 standard library, instead of using one of the obvious frameworks.
The server can create tokens for clients. A token is required for the server to accept data.
# Usage
python manage.py get_token <node>
# To create a token for a node located in the basement for example
python manage.py get_token basement
['basement']: 6ca8a296ef7a11eb8d4c645aede8070b
If a node by that name already exists, returns the corresponding token. The client is required to send this token to the server, otherwise the server will not accept data.
client/client.py
The client is a single standalone python script using only the python 3 standard library. This script can be copied to the Raspberry as is.
At the top of the script, there are some settings that are system dependent. These need to be set before running.
After setting these, running the client will collect data and drop it off at the server.
It probably makes sense to add the script to cron. Simplest way on the Pi is to put a script into /etc/cron.hourly/
Note that the name of the script may not contain a '.', otherwise run-parts() will not run it. Also, it needs to be executable. Remember that the script is run as root.
#!/bin/sh
cd /home/pi/tmon/
python3 client.py >> tmon_client.log
All test files are in the test/ directory and named test_*.py
Running
python -m unittest
Finds and runs all of these tests
To regularly check that tmon is running use scripts/cron/checktmon e.g. add or link it to /etc/cron.hourly/
Note that in case of a failed check, this tries to send an email using
scripts/send\_tmon\_error.py. Both files will need to be adjusted.