#include <SoftwareSerial.h>

#define RX    3   // *** D3, Pin 2
#define TX    4   // *** D4, Pin 3
SoftwareSerial Serial(RX, TX);

void setup(){
  Serial.begin(9600);
  Serial.println("Initializing...");
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("running");
  delay(1000);
}