Serial Communication with two bluetooth modules on Arduino Mega

Question

I'm trying to communicate with two bluetooth module (RN-42) on the Arduino Mega.

I studied about Serial communication in Arduino, and I used Serial1, Serial2 to get information at the same time from the modules.

At the setup period, baud rate will be set. The command "$$$" makes the bluetooth module go into the configuration mode. Until this, everything works pretty well.

The problem is, it seems nothing works inside the loop(). I think Serial1.print(inByte), Serial2.print(inByte) doesn't work properly. I checked the TX1, TX2 port whether it sends any data or not by using LED, and the LED never blinked.

Here's the code that I used.

void setup() {
 // initialize both serial ports:
 Serial.begin(9600);
 Serial1.begin(115200);
 Serial1.print("$$$");
 delay(100);
 Serial1.println("U,9600,N");
 Serial1.begin(9600);
 delay(100);
 Serial1.print("?");
 Serial2.begin(115200);
 Serial2.print("$$$");
 delay(100);
 Serial2.println("U,9600,N");
 Serial2.begin(9600);
}
void loop() {
 // read from port 1, send to port 0:
 while(Serial1.available()>0) {
 char inByte = Serial1.read();
 Serial.print(inByte); 
 }
 while(Serial2.available()>0) {
 char inByte = Serial2.read();
 Serial.print(inByte);
 }
 // read from port 0, send to port 1:
 while (Serial.available()>0) {
 char inByte = Serial.read();
 Serial1.print(inByte);
 delay(10);
 Serial2.print(inByte); 
 }
} 

Thank you

• Wirewrap: Maybe try a Serial1.end() before the second Serial1.begin? Arduino reference documentation gives no specific info here. How do you exit command mode?
• evolutionizer: What i dont see is the part where you are asking module 1 to act as master, module2 to act as slave. And ask module 1 to connect to module 2.