Trying to setup an equivalent of Serial Monitor's "No line ending" on Terminal

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Robin2:
You may be able to solve your problem with suitable Arduino code.

Have a look at the examples in Serial Input Basics - simple reliable ways to receive data.

...R

Thank you, but the problem persists. I have used the second example to go through all the characters until '\n' is detected (code bellow), but unless I select "No line ending" mode on Serial Monitor, it yields the same two iterations instead of one.

const int trig_out = 5;
const int trig_in = 6;
int np = 11;
int count;
char dummy='a';
char endMarker = '\n';

void setup() {
  pinMode(trig_out,OUTPUT);
  pinMode(trig_in,INPUT);
  digitalWrite(trig_out,LOW);  
  Serial.begin(9600); 
}

void loop() {

  while(!Serial.available()){} //wait until something is ready to be read

  while(Serial.available()&&dummy!=endMarker){
    dummy=Serial.read();
  }
 
  for(count=0; count<np; count++){
    digitalWrite(trig_out,HIGH);
    delay(100);
    digitalWrite(trig_out,LOW);
  }
  delay(1000);
}