Temperature and humidity Arduino monitor

This is the source code for a very simple temperature and humidity logger based on an Arduino and the DHT22 sensor.

Hardware

You will need:

• Arduino board (with an USB cable)
• DHT22 sensor

Arduino source code

The Arduino source code is in the src directory, and can be compiled using the Arduino IDE.

You also need to install the DHT11/DHT22 library into your libraries folder.

Monitor script

You will need the pyserial module to use the monitoring script in the monitoring directory:

pip install pyserial

You can then read temperature and humidity data from the Arduino connected by an USB cable, by running:

python monitor/arduino_monitor.py

Zabbix template

You must first install the template found in the zabbix directory, and add it to the host the Arduino board is attached to.

To send temperature and humidity data to Zabbix, you will also need the py-zabbix package:

pip install py-zabbix

Copy the script somewhere:

mkdir -pv /var/lib/zabbix/scripts
cp monitor/arduino_monitor.py /var/lib/zabbix/scripts

Copy the systemd service:

cp systemd/arduino-sensors.service /etc/systemd/system

You can optionally edit the --host, --temperature-item and --humidity-item arguments to match the names of the host and items you use on your Zabbix installation.

Reload, enable and start:

systemctl daemon-reload
systemctl enable arduino-sensors.service
systemctl start arduino-sensors.service

Enjoy: