Модуль bluetooth JDY-33 BLE 3.3В

#include "SoftwareSerial.h"

SoftwareSerial BTSerial(5, 6); // RX | TX
// PIN5 = RX <--- TXD JDY-33
// PIN6 = TX ---> RXD JDY-33
// mobile or PC Disconect bluetooth
// Arduino IDE = [ 9600baud ] / [ Both NL &CR] (\r\n)

void setup() {

Serial.begin(9600);
Serial.println("Enter AT commands:");
BTSerial.begin(9600); // JDY-33 default speed in AT command more
}

void loop() {
// Keep reading from JDY-33 and send to Arduino Serial Monitor
if (BTSerial.available())
Serial.write(BTSerial.read());

// Keep reading from Arduino Serial Monitor and send to JDY-33
if (Serial.available())
BTSerial.write(Serial.read());
}