I have a BotBoarduino (a Duemilanove with a few extras) that I'm trying to communicate with using a Perl script. If I open the Serial Monitor from the Arduino IDE, I can send and receive data without a problem. Following this, my Perl script can communicate without any problems. However, if the Arduino is disconnected then reconnected to the PC, the Arduino doesn't seem to listen to commands sent from my Perl script until Serial Monitor is opened again.
I also tried using PuTTY to communicate with the Arduino, and this works the same way as Serial Monitor from the Arduino IDE - the Arduino doesn't listen to my Perl script until the connection has been opened once.
Here is a sample of the way I'm communicating with the Arduino using Perl:
my $PortName = "COM4";
my $sendData = "c";
### SERIAL PORT SETUP ###
my $PortObj = new Win32::SerialPort($PortName) or die "Can't open $PortName: $^E\n";
I have commented out the dtr_active, rts_active and handshake bits. I played around with these settings as they were mentioned as possible culprits somewhere.
Also, I have used a 120 Ohm resistor to stop the Arduino from auto-resetting as described at http://playground.arduino.cc/Main/DisablingAutoResetOnSerialConnection
Does anyone have any suggestions for the settings needed to get the Arduino to listen to my Perl program without having to open PuTTY/Serial Monitor first?