Need code help

[Fadel saleh]

I have built a device equipped with an antenna. I used an Arduino, a control screen, and a single button. I also added external components: an LM386 amplifier IC, a BD139 transistor, and a 10k variable resistor, along with ceramic and disc capacitors. The setup relies on a ground connection (negative/earth) and an antenna. I also wrote and uploaded the code for it.

However, it is not working. Could the issue be with the code? If anyone has experience or knowledge regarding how the code should be structured, please advise.

[Alone25]

Which integrated circuit did you use for the antenna input in the schematic?

This is because the signals coming from the antenna have a value that is too low for the Arduino's input level.

Did you build this circuit on a PCB, or are you testing it in Proteus?

[Fadel saleh]

Tested on a breadboard