I am using a node MCU ESP8266 board, my relays are connected like this:
vin to 5v from power supply and ground too
and when I send a 0 signal the relay turn on so i think they are active low
here is the link: https://www.aliexpress.com/item/4000763217712.html?spm=a2g0o.productlist.0.0.30a555288HrKDy&algo_pvid=4f008f05-f06b-4adb-8b5b-dcbcec5d6488&algo_expid=4f008f05-f06b-4adb-8b5b-dcbcec5d6488-16&btsid=0bb0623216060618243478926e5682&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
I just want that when the arduino restart the relays stay off