Serial monitor infinite output

I'm confused about what the device is, still. As in, its part number.

You don't generally connect things via a single wire. Does the device have a ground wire? Is it wired to the Arduino ground?

i don't have a photo or a schematic sir,

Do you have a phone with a camera in it? How about using it?

here's what my output is

I believe you. You don't have to attach a screenshot. You can copy and paste from the output window.