Processing 1.0 - Processing Discourse - write multible serials to arduino

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Index › Programming Questions & Help › Electronics, Serial Library › write multible serials to arduino

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write multible serials to arduino (Read 1940 times)

broenni

write multible serials to arduino
Jan 23^rd, 2007, 9:11am

hello

i try to transfair an array of 8 integers from processing to an array in arduino with serial.write and serial.read.
sending and receiveing works fine but i have problems with the order of the numbers. the first integer i send has to get to the first position in the arduino array, and so on.
so far all my attempts didnt realy work.

could anyone help me on that?

greyskale

Re: write multible serials to arduino
Reply #1 - Feb 8^th, 2007, 4:51am

Rob,

I was wondering if you'd post your code so I can take a look. I'm working on a similar problem and may have the solution to yours... you need a header. a byte or int or whatever that always starts off your transmission. then arduino or processing will always look for that as the start and order them accordingly.

Ryansway

Re: write multible serials to arduino
Reply #2 - Aug 26^th, 2007, 3:26am

Another common issue:-

Start by sending a handshake byte, then send the individual bytes, like this

port.write('A');// send A to represent the beginning of the transmission
delay(10);
port.write(first); // send first
delay(10);
port.write(second); // send second
delay(10);
port.write(third); // send third etc

On the Arduino side:-

Use Serial.read(), count the number of bytes received, when the number of bytes received, have been received, then you have an array to to pull the bytes out in the order they were sent, eg, array[0] is the 'A', [1] is the first byte, [2] the second, etc etc

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