This relay module requires 5V to work. The Arduino that I tried it out with did not 5V output to the digital and analog pins. I’ll test some other microcontrollers later, but for now, if you are using the HW-482 Module you’ll have to do some tricks with other components. Once I’ve tested those out I’ll post them here.
If you do need to operate a relay and your Arduino only puts out 3.3V, I’ve ordered and will soon be testing these: Teyleten Robot DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5) https://www.amazon.com/dp/B07XGZSYJV?psc=1&ref_=cm_sw_r_ud_ct_B5H7F4J36PMQQSR395E0
This page will contain information for the HW-482 Relay Module. It will include pinout and specifications. There also will be links to the projects that leverage it.