serial_experiments2.ino

#include <SoftwareSerial.h>

SoftwareSerial skbd(D1, D2); //RX. TX

#include <dummy.h>

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  skbd.begin(9600);
  Serial.println("started...");
}

void loop() {
  // put your main code here, to run repeatedly:
  while(skbd.available() > 0) {
    Serial.print("CH: ");
    Serial.println(skbd.read());
  }
}