HC 05 ble module not connecting

Projects Networking, Protocols, and Devices
1

Hi!

I have two HC 05 modules(ZS - 040 with button).

The problem is, that I'm unable to establish any kind of connection.

First I tried to connect it using software serial ports, but I got nothing. Then I tried hardware serial and got the same results. I tried simple example sketches I found on the Internet. I couldn't connect to it.

Serial.available() returned false

Even if i just connect it to pover and ground, I'm unable to see them on my phone(and any other phone).

Also the LED is blinking fast. I can also start it in AT mode when I hold the button on start, because the LED then blinks slower, but either way, I couldn't get connection.
I would be very grateful for any help.

2

HC-05 is not a BLE device.

There is no "either way" If the LED is flashing fast, you will never get a connection. If it is slow, the phone should be able to sniff for it. This is a phone procedure done in phone settings. This presupposes the phone is Android and your Bluetooth really is an HC-05.

You might find the following background notes useful.

http://homepages.ihug.com.au/~npyner/Arduino/GUIDE_2BT.pdf
http://homepages.ihug.com.au/~npyner/Arduino/BT_2_WAY.ino

3

Thank you very much for the answer. I'll look into it and will try baud rate 9600. I don't think I've tried that

4

In the document, I keep reading, that it should be ready "out of the box".

If i connetct it to D0 and D1 pins. Should this code work in a sense, that if the module could communicate with PC, it will write to the Seerial monitor Available?

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

void loop() {

if (Serial.available())
{
Serial.println("Available");
}
else
{
Serial.println("Not Available");
}
}

Because I get non available message only.

5

I am moroon for not reading the Serial library. Consider this closed and I'm sorry for wasting your time