FPM10A GenImg Arduino NodeMCU ESP8266

#include "SoftwareSerial.h"

// 14, 12 adalah angka GPIO, bukan angka label
// NodeMCU, label (GPIO): D0(16), D5(14), D6(12), D7(13), D8(15), D4(2), D3(0), D2(4), D1(5)
SoftwareSerial fpm( 14, 12, false, 256 ); // (micro.rx/fpm.tx, micro.tx/fpm.rx, false, 256)

void setup() {
  Serial.begin( 115200 );
  fpm.begin( 57600 );
  Serial.println("Ready");
}

void loop() {
  while ( Serial.available() > 0 ){
    char c = Serial.read();
    if ( c == 'G' ){
      Serial.println("GenImg");
      fpm.write( (uint8_t) 0xEF );
      fpm.write( (uint8_t) 0x01 );
      fpm.write( (uint8_t) 0xFF );
      fpm.write( (uint8_t) 0xFF );
      fpm.write( (uint8_t) 0xFF );
      fpm.write( (uint8_t) 0xFF );
      fpm.write( (uint8_t) 0x01 );
      fpm.write( (uint8_t) 0x00 );
      fpm.write( (uint8_t) 0x03 );
      fpm.write( (uint8_t) 0x01 );
      fpm.write( (uint8_t) 0x00 );
      fpm.write( (uint8_t) 0x05 );
    }
  }
  while ( fpm.available() > 0 ){
    Serial.print("FPM: ");
    while ( fpm.available() > 0 ){
      Serial.print( fpm.read(), HEX );
      Serial.print( ' ' );
    }
    Serial.println();
  }
}