Simple script for obtaining measurements from the INA226 sensor in Zabbix. Based on pi_ina226 library.

Requires gpiod and SMBus2.

sudo apt-get install gpiod python3-smbus2

It is assumed that Zabbix-Agent is already installed. Don't forget to grant the zabbix user the necessary permissions to work with I2C bus and GPIO.

sudo usermod -a -G i2c zabbix
groupadd gpio
sudo usermod -a -G gpio zabbix

sudo echo '# udev rules for gpio port access through libgpiod
SUBSYSTEM=="gpio", KERNEL=="gpiochip[0-4]", GROUP="gpio", MODE="0660"' > /etc/udev/rules.d/60-gpiod.rules

sudo udevadm trigger --subsystem-match=gpio

In /etc/zabbix/zabbix_agentd.conf, add the following UserParameter, modifying the path according to where the repository was cloned::

sudo echo 'UserParameter=data,python3 /opt/zabbix_ina226/get_data.py' >> /etc/zabbix/zabbix_agentd.conf

We can also obtain the GPIO state using the get_gpio.sh script and send the data to Zabbix. In this case, the sensor on GPIO 66 indicates the presence of AC power.

sudo echo 'UserParameter=ac_loss,bash /opt/zabbix_ina226/get_gpio.sh' >> /etc/zabbix/zabbix_agentd.conf

Let's restart the zabbix-agent to apply the changes.

sudo service zabbix-agent restart

The source code assumes that the sensor works with a 0.002R shunt, on the I2C-3 bus, and with the address 0x40. If not, you can change shunt_ohms, busnum, address, and max_expected_amps as needed in get_data.py.