char search[]= "COMMAND-"; //Defined a search string to look for the command amongst the noise

void setup() {
  Serial.begin(115200);

  Serial1.begin(115200); // Serial1 is connected to the custom chip

  Serial.println("Data received from UART chip:");
}

void loop() {
  while (Serial1.available()) { //looks for data on UART line
    if (Serial1.find(search)){//the find function to look for the command in the stream of noise
      delay(10); //delay gives the mcu a chance to capture the command character from stream
      Serial.print(search);// prints the search string
      Serial.print((char)Serial1.read());//prints the command character 
    }
    
  }
}