problem receiving data over bluetooth - ketai

Android Processing

Nick Puck..

problem receiving data over bluetooth - ketai

in Android Processing • 1 month ago

I have worked on a few projects using the ketai library where an android tablet communicates with an Arduino over bluetooth. Sending data from Android seems to work fine, but I'm getting a lot of incomplete messages and garbage data when receiving data back from the arduino. Has anyone else had this problem?

Replies(1)

machainey

Re: problem receiving data over bluetooth - ketai

27 days ago

I had that problem. What I ended up doing is allowing fragmented messages in the way the sketch received the input by using a special character to indicate that the message is complete ("|" in this case). Here is a portion of my sketch to give you an idea:

public void onBluetoothDataEvent(byte[] data)
{
println("Blootooth event");
if(!firstContactMade){
send("_");
firstContactMade = true;
} else {
for(int i=0; i<data.length; i++)
{
command = getCommands((char)data[i], command);
}
}
}
private String getCommands(char inChar, String command)
{
if(inChar == '|') //Input message is complete
{
//Do something about input
} else {
//Input message is NOT complete, keep reading
command+=inChar;
}
return command;
}

I have other problems with the Android/Arduino communications... so I'm no expert.

But I hope this helps you.

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