I came across this relay expansion module on eBay the other day.
https://www.ebay.com/itm/401960095748
It looks different than most of the others that are readily available with the addition of a 5v/12v jumper and another 2x6 header, most of which you can't see any markings on.
For my application, being able to power directly from a 12v source would simplify things a lot, so I'm interested in more information about it.
The only reference I could find online was to a site in Persian, but it doesn't appear to have any technical information.
https://redronic.com/product/kz-m1/
What I am most interested in is first whether it can indeed run from a 12v source, but equally important is how the relay is controlled. I need a board that just does simple control of the relay directly from one of the GPIO pins rather than going through another controller like some of the other boards do. It would also be nice to know what the rest of the pins on the header are for. I assume maybe TX/RX, and perhaps a reset?
They're a little pricey compared to others, so I'd hate to order one only to find out it's not what I think it is. If anyone has any information on these modules, please share it here. They look like they have the potential to be a really nice implementation of an ESP8266 controlled single relay.
Thanks.