Arduino serial monitor outputs garbage characters when used with HC-05 [SPLIT from another topic]

Projects Programming
1

have the same problem when i want to use my old button phone as a gm module, i connected my old button phone to rx-tx and tx-rx of arduino ,and i change the serial pins as well but i was getting garbage output to the serial monitor i have tried to change the baud rate but still getting same results here is the code:

#include <SoftwareSerial.h>

SoftwareSerial mySerial(2,3);

void setup()
{
mySerial.begin(19200); // the GPRS baud rate
Serial.begin(19200); // the GPRS baud rate
}

void loop()
{
if (mySerial.available())
Serial.write(mySerial.read());
if (Serial.available())
mySerial.write(Serial.read());

}

2

Your post is completely incoherent, most particularly the title, and the comments in the loop section are probably nonsense. I don't dare ask what an old button phone is, or what it is doing connected to Arduino's serial port. Is HC-05 actually connected to Arduino? If so, what baud rate have you configured it to?

3

usually incorrect characters in the serial port means communication speed error or coding error between the two devices