Getting data from POWR320D through an API

Hello. I am trying to fetch raw data (voltage, power, amps…) from a POWR320D device from a server. I was thinking there was a sort of REST API available but I do not find it. Could someone direct me to the right place where I can find the documentation for this? Thanks.

Are you using the phone app, an iHost or an NSPanel Pro to control the device?

I use the eWelink android app

That is a pity as it is probably really easy on the iHost and NS Panel Pro but there is a Virgin repository for the integration of Sonoff with Home Assistant- the answer must be here. They might even point you in the direction of the API document. I’ve never actually seen it but it obviously exists.