Thanks it's work great !
Maybe you can optimize and search automatically the cost in domoticz settings:

local function getCosts(id) -- these costs should be set in domoticz settings
if next(dz.data.energyCosts) == nil or dz.data.energyCosts.creationTime < ( dz.time.dDate - dz.time ...

Hello,

I would like to drive a power supply 220V with domoticz: I press my switch and I activate a smart plug that puts the power supply on.

Now I have a xiaomi aqara switch https://www.aliexpress.com/item/Xiaomi-Mijia-Aqara-Intelligent-No-Fil-Switch-Intelligent-Distance-A-Contr-le- Cl-Aqara-L ...