void setup() {

  Serial.begin(115200);

  String msg_text = "/limit 2 5678";
	//String msg_text = "/limit";
  String my_string1 = "";
	String my_string2 = "";
	String my_string3 = "";
	String my_string4 = "";
  
  	if (msg_text.startsWith("/limit")) {
		  if (msg_text == "/limit") {		//справка по команде limit_N_value
		      Serial.println("===/limit N value===, N строго 1 или 2, value строго 4 цифры");
		  } else {
				my_string2 = msg_text.charAt(7);
				my_string3 = msg_text.substring(9);
				if (my_string2 == "1") {
					int soilMoistureLimit1 = my_string3.toInt();
					Serial.println(soilMoistureLimit1);
				}
				if (my_string2 == "2") {
					int soilMoistureLimit2 = my_string3.toInt();
					Serial.println(soilMoistureLimit2);
				}
				my_string1 += "Лимит влажности ";
				my_string1 += my_string2;
				my_string1 += " составляет ";
				my_string1 += my_string3;
		}
	}
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}