I'm trying to simulate the serial connection from an Arduino into a Processing applet since I don't have an Arduino at the moment. Simply, I'm trying to just send bytes from Bash to a serial connection (on /dev/ttyS0) which the Processing applet will pick up like it would from an Arduino. I tried the answer to this question: How can I send data to the serial port from a Linux shell?, but it's simply not working and I don't know how to go about debugging something like this since I've never played with serial connections before. Any advice? Thanks much.