The relay is activated using an active-low signal i.e. a logic-low (L) signal wakes the relay up. Below is the pinout of the ESP-01/ESP ... or you can program the ESP-01 module with the help of the ...

Welcome to my quick review of an inexpensive 2-channel 5V relay module controlled ... Here are the pinout details of the module: Obviously, I wanted to try out my module, but had no idea where to ...