#include <Arduino.h>
#define RXD2 16
#define TXD2 -1
HardwareSerial Serial2(1);
void setup () {
Serial2.begin(57600, SERIAL_8N1, RXD2, TXD2);
}
void loop () {
now = millis();
if (Serial2.available() > 0) {
//cmdChar = Serial2.read();