revsystem / raspberry-mh_z19

mackerel monitoring for mh_z19

raspberry-mh_z19

For more information,please visit https://qiita.com/revsystem/items/76ab1e21d386c5977892 (in Japanese.)

Raspberry Pi and mh_z19 connection diagram

Raspberry Pi config

sudo raspi-config

5 Interfacing Option -> P6 Serial

Would you like a login shell to be accessible over serial?

-> No

Would you like the serial port hardware to be enabled?

-> Yes

install mh-z19 library

sudo pip3 install mh-z19
sudo apt-get install jq ruby

mh_z19 command

You can get CO2 value with below command.

sudo python3 -m mh_z19
{"co2": 398}

sudo python3 -m mh_z19  --all
{"co2": 383, "temperature": 26, "TT": 66, "SS": 0, "UhUl": 0}

Example of mackerel-agent.conf

[plugin.metrics.co2]
command = "ruby /home/pi/mackerel/mh_z19_monitoring.rb"
env = { MONITOR = "co2" }

[plugin.metrics.temp]
command = "ruby /home/pi/mackerel/mh_z19_monitoring.rb"
env = { MONITOR = "temperature" }

reference

command reference: https://pypi.org/project/mh-z19/

Calibration reference: https://github.com/UedaTakeyuki/mh-z19/wiki/CALIBRATION-&-detection-range