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Topic: Serial message between 2 Arduinos using xbees - receiving garbage (Read 504 times) previous topic - next topic

caliph

Jan 26, 2013, 09:03 pm Last Edit: Jan 26, 2013, 09:06 pm by caliph Reason: 1
Ladies and Gents,

I am stuck with this little issue and searching could not help either.

I have a setup of 2 Arduinos connected with xbees.
The sending Arduino is sending this message every 5 seconds:
<1>
<2>
<3>
etc.

Code: [Select]
int MeasurementID = 1;
...
Serial.print("<");               // Start Char
Serial.print(MeasurementID);
Serial.print(">");           // end char
MeasurementID++;

...

The receiving Arduino is using this code:
Code: [Select]
void setup() {
  Serial.begin(57600);    
  mySerial.begin(57600);}

void loop() {
 while(mySerial.available() > 0) {
   char inChar = mySerial.read();
   Serial.print(inChar);
 }
}


On the serial monitor I receive this:
<????
<<±???
etc.
Basically the first char of the message is correct then I receive garbage.

Can anybody tell me why I recieve this?

zoomkat

probably best to post all the code for both. Is MeasurementID possibly a non printable value?
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

liudr

You are using software  serial port?

Is it running at 57600? That is too fast for software  serial,if you are doing it.

caliph

Thanks for your hint on checking the baudrate.

In the Softwareserial description I found:
" It is possible to have multiple software serial ports with speeds up to 115200 bps."
So I thought I was ok... but:

Nevertheless I changed by baudrate down to 9600 and it solved my problem. Strange though.

liudr


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