Grid Meter frequency values rounded to 0.05 Hz – lost precision compared to earlier behavior

Node-RED
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1

Hi everyone,

I’m using Node-RED on a Venus OS system to monitor the grid frequency via a Grid Meter (com.victronenergy.grid/31, path /Ac/Frequency).

I’ve noticed that the frequency values now only change in 0.05 Hz steps, for example:

49.95 → 50.00 → 50.05 → 50.00 → ...

Previously, these values were provided with higher resolution, such as 49.97 or 50.02 Hz. May be OS 3.6.
The Node-RED flow is correctly configured to display two decimal places, and I’ve confirmed via a debug node that the values are already rounded when received from D-Bus. The Grid Meter itself likely provides more precise data internally.

I suspect this change may have been introduced in a recent Venus OS version or within the dbus-gridservice, possibly as a form of smoothing or rounding.

:red_question_mark: My questions:

  • Was this rounding behavior intentionally implemented?

  • Is there a way to access raw, high-resolution frequency values again?

I’m using the frequency values to track daily min/max levels, and this rounding significantly reduces the detail of those measurements.

Thanks in advance for any help or clarification!
Best regards,

Ronald