The hardware is:

• Raspberry Pi
• DS18B20 for temperature (±0.1°C)
• DHT-22 for Humidity (5% RH accuracy) and temperature (±0.5°C accuracy)

API backend available here here

Check the live version https://logs.tsaklidis.gr

I use the system's cron to run the script and monitor the output. To edit the cron use

crontab -e

And run the script every 5 minutes

*/5 * * * * python ~/send_data.py >> ~/info.log 2>&1

In order to run the fan.py script on each system start, add the file located at src/system/fan.service to the lib folder

# nano /lib/systemd/system/fan.service

The flow is:

graph TD;
  DS18B20-->Raspberry;
  DHT11-->Raspberry;
  Raspberry-->API;
  API-->Browser;

I created an API system. You can use it in order to save your data. If you like sql + php version use the code on master.

TODO:

• On data loss, save all the data saved to pickle file

If you have any questions or problems running the scripts just contact me.