Serial Read Digital output

Completely new to coding and I'm wanting to read weigh scales from tx pin and output a HIGH on pin 13 (Ledbuiltin)
So far I am reading SoftwareSerial with the code below.

#include <SoftwareSerial.h>

#define rxPin 3
#define txPin 4

SoftwareSerial softSerial(rxPin, txPin);

void setup() {

softSerial.begin(9600);

Serial.begin(9600);
}

void loop() {
byte n = softSerial.available();
if(n!=0)
{
char data = softSerial.read();
Serial.print(data);
}

....and?

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What hardware do you have ?


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Show us a good image of your ‘actual’ wiring.
Give links to components.


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Using components below
10kg Load cell with HX711 and built in screen Amazon
Nano
5V relay
24vdc Solenoid valve

It is for filling small buckets with liquid. I'm wanting to open the solenoid valve when the empty bucket is placed on the scale and stop filling when the weight reaches a preset level.

#include <SoftwareSerial.h>

#define rxPin 3
#define txPin 4

SoftwareSerial softSerial(rxPin, txPin);

void setup()  {

  softSerial.begin(9600);

  Serial.begin(9600);
}

void loop() {
  byte n = softSerial.available();
  if (n != 0)
  {
    char data = softSerial.read();
    Serial.print(data);
  }

}

Have a look at the example sketches in Arduino Serial – Reading/Parsing for ways to read data from Serial (and SoftwareSerial) and parse it.
There are pros/cons for each example given