Count impulses via 'Volkszähler Hichi Smartmeter'?

Dear all,

I have my German smart meter already included via EDL21, however, I have the wallbox for one of my cars running via it - i.e. the view is a mix of house electric consumption and the wallbox. I have a separate meter (Eltako DSZ15D-3x80A) for the wallbox which provides 1 pulse for 0.1 kWh.
Given that I have a spare Volkszähler Hichi Smartmeter, I was wondering if I could use it as well to do the counting for the extra meter to be able to ‘dissect’ my EDL21 power consumption.
Any ideas or suggestion would be much welcome.

Thank you for your help!

P.S: I am aware of the ESPhome variants to do the pulse counting, but was hoping to use existing hardware instead of buying something extra.

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