74 lines
2.3 KiB
Markdown
74 lines
2.3 KiB
Markdown
# Rapsberry Pi MQTT monitor
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Python script to check cpu load, cpu temperature, free space, voltage and system clock speed
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on a Raspberry Pi computer and publish the data to a MQTT server.
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I wrote this so I can monitor my raspberries at home with [home assistant](https://www.home-assistant.io/). The script was written and tested on Python 2 but it should work fine on Python 3.
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The script if very light, it takes 4 seconds as there are 4 one second sleeps in the code - due to mqtt have problems if I shoot the messages with no delay.
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# Installation:
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If you don't have pip installed:
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```bash
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$ sudo apt install python-pip
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```
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Then install this module needed for the script:
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```bash
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$ pip install paho-mqtt
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```
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Rename config.py.example to config.py and populate the needed variables
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Test the script.
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```bash
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$ /usr/bin/python /home/pi/scripts/rpi-cpu2mqtt.py
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```
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Create a cron entry like this (you might need to update the path on the cron entry below, depending on where you put the script):
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```
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*/2 * * * * /usr/bin/python /home/pi/scripts/rpi-cpu2mqtt.py
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```
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# Home Assistant Integration
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Once you installed the script on your raspberry you need to create some sensors in home assistant.
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This is the sensors configuration assuming your sensors are separated in sensors.yaml file.
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```yaml
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- platform: mqtt
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state_topic: "masoko/rpi4/cpuload"
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name: rpi 4 cpu load
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unit_of_measurement: "%"
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- platform: mqtt
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state_topic: "masoko/rpi4/cputemp"
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name: rpi 4 cpu temp
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unit_of_measurement: "°C"
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- platform: mqtt
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state_topic: "masoko/rpi4/diskusage"
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name: rpi 4 diskusage
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unit_of_measurement: "%"
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- platform: mqtt
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state_topic: "masoko/rpi4/voltage"
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name: rpi 4 voltage
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unit_of_measurement: "V"
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- platform: mqtt
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state_topic: "masoko/rpi4/sys_clock_speed"
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name: rpi 4 sys clock speed
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unit_of_measurement: "hz"
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```
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After that you need to create entities list via the home assistant GUI.
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You can use this code or compose it via the GUI.
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```yaml
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type: entities
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title: Rapsberry Pi MQTT monitor
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entities:
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- entity: sensor.rpi4_cpu_load
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- entity: sensor.rpi4_cpu_temp
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- entity: sensor.rpi4_diskusage
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- entity: sensor.rpi_4_voltage
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- entity: sensor.rpi_4_sys_clock_speed
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``` |