> When i connect the vcc of the relay to 3.3v then the relay is not turned on and neither the red led or tge green led is turned on. Well, there's your likely problem. The ESP32 only can output up to 3.3V on its GPIOs, and presumably your relay needs 5V minimum. Dear, my relay supports both 3v and ...

I tried to drive a relay module with heltec esp32 v2 board but it wouldn't turn on the green led. I tried connecting the vcc of the relay to the 3.3 pin on the board and also tried the 5v. The voktage supplied to the board is about 6v. If i connect the vcc of the relay to 5v of esp32 then the green ...