Impulse relay turns on with an electrical impulse at the control input and turns off again with another impulse.

See the circuit board that I have taken out of the shell. Using this relay unit might kill your precious M5Stack ... In my view, overall safety should be the prime focus when designing a module to ...

When a pre-programmed ESP module is inserted into the relay board, it not only serves as the brain for the relay but also provides Wi-Fi connectivity to allow a computer or a smartphone to command the ...

You need a power source, a way to level convert the driver pins, and some protection in case something goes wrong with the circuit. Looking at the board above ... control the relay using 3.3V ...