Programming with HC-05 but nothing show up on terminal

Projects Programming
1

I run the program but nothing show up on terminal but “AT”. And base on what I know HC-05 have basic password is “1234” when purchase but my don’t have password.
Part list: Adruino Uno R3, HC-05
Program:


// code by Martyn Currie.
// To enable AT mode, connect the EN pin of the HC05 
// to 3.3V before powering the HC05.
// Caution, do not connect EN to 5V.

#include <SoftwareSerial.h>
SoftwareSerial BTserial(2, 3); // RX | TX

const long baudRate = 38400;
char c = ' ';
boolean NL = true;

void setup()
{
   Serial.begin(38400);
   Serial.print("Sketch:   ");   Serial.println(__FILE__);
   Serial.print("Uploaded: ");   Serial.println(__DATE__);
   Serial.println(" ");

   BTserial.begin(baudRate);
   Serial.print("BTserial started at "); 
   Serial.println(baudRate);
   //BTserial.print("BTserial started at "); 
   //BTserial.println(baudRate);
   Serial.println(" ");
}

void loop()
{
   // Read from the Bluetooth module and send to the Arduino Serial Monitor
   if (BTserial.available())
   {
      c = BTserial.read();
      Serial.write(c);
   }

   // Read from the Serial Monitor and send to the Bluetooth module
   if (Serial.available())
   {
      c = Serial.read();
      BTserial.write(c);

      // Echo the user input to the main window. The ">" character indicates the user entered text.
      if (NL)
      {
         Serial.print(">");
         NL = false;
      }
      Serial.write(c);
      if (c == 10)
      {
         NL = true;
      }
   }
}

Here is some pictures:

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image720×958 221 KB

Thanks for your time

2

Did you do that?

and did you take care to not do that?

3

Yes I did exactly what you said

4

Before trying to do this with an Arduino sketch, have you just connected the HC05 to your computer, and verified that it responds to AT commands typed manually via a terminal?

5

Can you explain how to do this

6

This is Bd for AT Commands. For data communication, the BT works at Bd = 9600. Try changing the baudRate from 38400 to 9600.

Connect HC05 with UNO using BTserail(2, 3) and a resistor divider (STX (3) ---2.2k---RXPinOfBT---4.7k----- GND) to feed about 3.3V logic at RX-pin of BT.

Upload the following simple sketch (yours one but simplified) and check that you can exchange ASCII coded data with your Android Phone.

#include <SoftwareSerial.h>
SoftwareSerial BTserial(2, 3); // SRX | STX
char ch;

void setup()
{
   Serial.begin(9600);
   BTserial.begin(9600);
 }

void loop()
{
   if (BTserial.available())
   {
      ch = BTserial.read();
      Serial.print(ch);
   }

   if (Serial.available())
   {
      ch = Serial.read();
      BTserial.print(ch);
   }
}
7

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