I was able to get two bluetooth mates and two arduino pro minis communicating perfectly through the serial windows using the suggested code from sparkfun on each arduino
#include <SoftwareSerial.h>
int bluetoothTx = 2; // TX-O pin of bluetooth mate, Arduino D2
int bluetoothRx = 3; // RX-I pin of bluetooth mate, Arduino D3
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
void setup()
{
Serial.begin(9600); // Begin the serial monitor at 9600bps
bluetooth.begin(115200); // The Bluetooth Mate defaults to 115200bps
bluetooth.print("$"); // Print three times individually
bluetooth.print("$");
bluetooth.print("$"); // Enter command mode
delay(100); // Short delay, wait for the Mate to send back CMD
bluetooth.println("U,9600,N"); // Temporarily Change the baudrate to 9600, no parity
// 115200 can be too fast at times for NewSoftSerial to relay the data reliably
bluetooth.begin(9600); // Start bluetooth serial at 9600
}
void loop()
{
if(bluetooth.available()) // If the bluetooth sent any characters
{
// Send any characters the bluetooth prints to the serial monitor
Serial.print((char)bluetooth.read());
}
if(Serial.available()) // If stuff was typed in the serial monitor
{
// Send any characters the Serial monitor prints to the bluetooth
bluetooth.print((char)Serial.read());
}
}
I used this code to get the LED to light up, and then turn back off depending on an a or b entered into the serial window of the sending arduino
void loop()
{
if(bluetooth.available()) // If the bluetooth sent any characters
Serial.print ((char)bluetooth.read());
inByte = (char)bluetooth.read();
if(inByte == 'a') { // byte is 'a'
digitalWrite(13, HIGH);
Serial.println("LED - On");
}
else if( inByte == 'b'){// byte isn't 'a'
digitalWrite(13, LOW);
Serial.println("LED - off");
}
if(Serial.available()) // If stuff was typed in the serial monitor
{bluetooth.print((char)Serial.read());
}
}
This is working, but then instead of typing just an "a" or a "b" i decided to type in longer data to see what would happen. I then noticed that when I type in the word hello for instance, the receiving arduino serial would only display ello, or llo, or ell. At this point i realized that when typing just "a" or "b", sometimes the LED would not turn on or off at the first instance, sometimes i would have to enter "a" several times to get the LED to light.
It was at this point that I realized I am loosing data somehow from the sending arduino to the receiving. When I used the first set of code provided by sparkfun there was no data loss. using my modified code i am getting some data loss.
I could have my transmitting arduino always broadcast the status of the two push buttons by sending constant commands, but I would rather only transmit when a button is pushed instead of constant transmission.
Does anyone see when my mistake is at?
I found this old post you wrote on capturing Serial data using started && ended: http://forums.adafruit.com/viewtopic.php?f=8&t=9918
I was able to get the code to work using a single letter or number for control without losing data like I had been before. I won't bother posting the code because that is not the purpose of this question. After trying several different methods from strings to arrays I realized that as soon as I tried to capture the data and store it in an array I would lose some of the data. I removed that part of the code and set in some delays and that is when I saw how it receives the information from the bluetooth module one piece at a time. So at this point I realized i needed some sort of way to state this is the beginning of a string, and then have a character to declare the end of the string. That is what led me to the post that i linked above.
So I have taken your example and integrated it with the bare code that the bluetooth module uses, and I am getting an error compiling, I added your code one line at a time and recompiled as I went.
Anyways I auto formatted for you
#include <SoftwareSerial.h>
int bluetoothTx = 2; // TX-O pin of bluetooth mate, Arduino D2
int bluetoothRx = 3; // RX-I pin of bluetooth mate, Arduino D3
int inByte = 0;
char c =0;
int led = 13;
boolean started = false;
boolean ended = false;
char inData[24]; // Size as appropriate
byte index = 0;
#define SOP "{"
#define EOP "}"
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
void setup()
{
pinMode(led, OUTPUT);
Serial.begin(9600); // Begin the serial monitor at 9600bps
bluetooth.begin(115200);
bluetooth.print("$");
bluetooth.print("$");
bluetooth.print("$");
delay(100);
bluetooth.println("U,9600,N"); // Temporarily Change the baudrate to 9600, no parity
bluetooth.begin(9600); // Start bluetooth serial at 9600
}
void loop(){
while(bluetooth.available() > 0)
{
char inChar = bluetooth.read();
if(inChar == SOP)
{
started = true;
index = 0;
inData[index] = '\0';
}
else if(inChar == EOP)
{
ended = true;
break;
}
else
{
if(index < 24-1) // Array size
{
inData[index++] = inChar;
inData[index] = '\0';
}
}
}
if(started && ended)
{
// Parse the data in inData here...
}
}
When I try to compile this I get this error:
v1_1_ino.ino: In function 'void loop()':
v1_1_ino:35: error: ISO C++ forbids comparison between pointer and integer
v1_1_ino:41: error: ISO C++ forbids comparison between pointer and integer
When I wanted to pair the neurosky mindwave mobile 2 to the arduino via a bluetooth mate gold, it sent gibberish on my serial monitor. I checked, it had nothing to do with the baud rate. When i tried again after disconnecting my bluetooth mate gold from the arduino and shutting down the laptop, I could not send strings to the bluetooth mate gold. I can’t put it into command mode and so on.
