FYI when I try to turn on and off the Relay module trough the Blynk app, it turns on but it doesn't execute any sound out Relay which we normally we should hear that little sound. So that makes me think of maybe its not receiving enough power from vin pin which is 5v in this case.
I guess I really need to be clear from vin pin first . So I wonder how can I make sure if the vin pin is faulty or not?
is there any ways to test it without connecting the module to the server to make sure where the issue is coming from?
Thank you everyone.