Hc-05 bluetooth module with external anntena

[wafif27]

Hi everyone. I have a problem I recently sodered an anntena to my hc-05 bluetooth module from an old radio, what seems to happen is that the anntena does not affect anything it seems as it does not work I took the module 18 meters with some obstacles and it disconected.
That is all the informatiuon I have here are some links to the radio that I used and some pictures with the code.
The Radio: https://uniden.com/collections/marine-radio-fixed-mount-handheld/products/atlantis-155-handheld-two-way-floating-vhf-marine-radio

The pictures:

The code:

#include <SoftwareSerial.h>

char value;
int Tx = 2;       // connect BT module TX to 2
int Rx = 3;       // connect BT module RX to 3

int redLED = 13;
int blueLED = 9;

// creates a "virtual" serial port/UART
SoftwareSerial bluetooth(Tx, Rx);

void setup() {
  pinMode(redLED, OUTPUT);
  pinMode(blueLED, OUTPUT);

  // start serial communication at default baud rate 9600bps
  Serial.begin(9600);
  bluetooth.begin(9600);
}

void loop() {
  
    if (bluetooth.available()) {
      
      value = bluetooth.read();
     
      if (value =='1') {
        digitalWrite(blueLED, HIGH);
        bluetooth.println("Blue LED on");
      }
      
      if (value =='2') {
        digitalWrite(blueLED, LOW);
        bluetooth.println("Blue LED off");
      }
      
      if (value =='3') {
        digitalWrite(redLED, HIGH);
        bluetooth.println("Red LED on");
      }
      
      if (value =='4') {
        digitalWrite(redLED, LOW);
        bluetooth.println("Red LED off");
      }
    }
}