Blue VZM31-SN switches aren't showing Voltage or Current in HA

Product Support
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1

I have a bunch of Blue VZM31-SN switches, and none of them are showing Current (Amps) or Voltage in Home Assistant. They do show Energy and Power though. My VZM30-SN switches, on the other hand, do show Current and Voltage along with Energy and Power.

I’m running HA 2025.8.3 with Z2M 2.6.1. The VZM31-SN switches are running firmware 2.18.

Does anyone have any tips for how to enable Current and Voltage with these switches?

2

The hardware for the VZM31 doesn’t support measuring voltage and current. The hardware for the VZM30 does. There’s nothing you can do to make it show up since the measurements don’t exist.

3

Well, that’s too bad. Thanks for explaining!

4

How could it measure power without measuring voltage and current?