No History for Command Line Sensor

1

I have a command line sensor configured to get my Pi CPU Temp, the sensor works and shows the Temp, but no history is available for the sensor, I have history for all other types of sensors, is this the normal behavior for command line sensors, or is something wrong somewhere, this sensor has been configured for more than a year, and I don’t remember ever seeing any history data.

CPU Temperature

  - platform: command_line
    name: CPU Temperature
    command: "cat /sys/class/thermal/thermal_zone0/temp"
    unit_of_measurement: "°F"
    value_template: '{{ (value | multiply(0.001) * 1.8 + 32) | round(1) }}'
2

How do you have recorder and history configured? And where are you looking for its history exactly?

3

@pnbruckner
No restrictions to both, hopping to see the daily history by clicking on the sensor in the front end.

history:

recorder:
  db_url: !secret db_url

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Hoping for something like below.

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image469×527 20.9 KB

4

Very strange. I just gave it a try. I copied your sensor configuration exactly and restarted:

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FWIW, I’m still running 0.84.6.

5

To be honest, I’m not sure when or in which version it stopped working, I’m currently on the latest, but did notice there wasn’t any history for the past 2-3 versions, I was only looking for it because the temp has reduced quite considerably after moving from an SD Card to a SSD, I know it works and registers temp changes, because prior to upgrading to a SSD, my automation for temp changes above 135 fired 3-4 times per day.

6

Weird. I have a test system running a recent dev checkout, but I can’t try this exact same scenario because it’s a different type of machine and there is no /sys/class/thermal/thermal_zone0/temp. I can try to find something else and see what happens.

7

FWIW, I just tried this contrived example on my recent dev checkout:

  - platform: command_line
    name: Disk Usage
    command: "df --output=pcent / | grep '[0-9.]*' -o"
    unit_of_measurement: "%"

It immediately provides history. Is it possible your database is corrupted somehow?

8

Uncertain, but doubtful, as I have history and log entries for all other sensors, except for system sensors.

9

Well, I’m totally stumped now, just added a DHT Sensor to my Pi3 and got history immediately.

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