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Topic: communication with arduino via seral from linux (Read 1 time) previous topic - next topic

xi4

I am attempting to play with the wifly shield. I have some code which I have loaded to the arduino, but now I have to communicate with it via "terminal" - this is a windows example. How do I do this in linux? (ubuntu)

Hans K

Doesn't the serial monitor in the Arduino IDE work for you?
Or do you want to communicate through the terminal, if so search for Linux tty.

pluggy

#2
Sep 25, 2010, 07:38 pm Last Edit: Sep 25, 2010, 07:40 pm by stephen_t Reason: 1
I use bash scripting

Code: [Select]

stty -F /dev/ttyUSB0 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts -clocal
cat /dev/ttyUSB0|head -n 6|tail -n 3 >> /root/arduino  #


The above sets ttyUSB0 to 115200 baud and reads the last 3 lines of 6 lines read into a file 'arduino' in roots home folder.  

I have the arduino sending data out in space delimited lines of text in groups of 3 lines continuously.  It reads 6 and takes the last 3 in case it joins the conversation part way through and corrupts the first line.  

I send single character commands back to the arduino
Code: [Select]

echo 'Z' > /dev/ttyUSB0


If it resets the arduino each time (it may or may not depending on your computer) stick something like a 1 - 10uF capacitor across gnd and the reset pin to 'swallow' the DTR auto reset pulse.

I have it all running through cron every minute to produce :

http://pluggy.is-a-geek.com/
http://pluggy.is-a-geek.com/index.html

beige

something like,

screen /dev/ttyUSB0 9600

should work, may have it the wrong way round, and I can't remember the default escape character to close the connection...

Or, use cutecom if you want a gui :)

MODAT7

After the mentioned stty lines, I've been using the following:
Code: [Select]
tail -f /dev/ttyUSB0

That way the AVR doesn't reset with every "cat" line.

To get serial data in, I just use
Code: [Select]
echo -n "something" > /dev/ttyUSB0

...or leave off the "-n" if a carriage return is needed.

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