bluetooth module sending false data [SOLVED]

Projects Programming
1

Hello everyone.
My project needs to send data between Master-Slave using Bluetooth modules hc05, hc06, I configured the hc05 to be Master and did the following:

  1. changed the baud to 9600 for hc05 ( hc06 is d 9600 by default )
  2. set hc05 as master
  3. automatically connect hc05 to hc06 Bluetooth module using hc06 address

everything is fine but some of the data that I sent from master to slave are false and some of them are correct!!
ex: sending (L) from the master the slave received (A);
I tried to add a delay between each character I send but nothing changed!

bluetooth modules - Arduino Uno
Tx - Rx pin(0)
Rx - Tx pin(1)
gnd - gnd
vcc - 3v

any help will be appreciated.

Serial.write('L');
  delay(600);
  Serial.write('L');
  delay(600);
  Serial.write('E');

SOLVED since I am newbie to the Arduino and after searching for Serial Communication it listed that even if the Arduino has multiple Serial Communication ports only one port will be used and because I am powering the Arduino through its USB port some collisions happened ( 0,1 to Bluetooth module and USB to the power )
using SoftWareSerial solved the problem.
thank you all

2

That is not complete code. Please post your complete code (or a stripped down version that displays the problem) so others can replicate/debug it an help you. Snippets of code are not useful.

3

The baud rate is the rate at which you communicate with the module, it has nothing to do with how they communicate with each other.

4

blh64:
That is not complete code.

the below code is from the master arduino
void setup() {
delay(3000);
  Serial.write('L');
  delay(1000);
  Serial.write('L');
  delay(1000);
  Serial.write('E');
}
void loop()
{
 
}

and the below code is from slave Arduino

the below code is from the master Arduino
void setup() {

}
void loop()
{
  if(Serial.available()>0)
{
  Serial.println((char) Serial.read());
}
}
5

the below code is from the master arduino

So, why doesn't that code ever call Serial.begin()?

and the below code is from slave Arduino

Same question.

6

my fault because i deleted Serial.begin(9600) with the comments that i was using,i mean it was in the code before the upload here !