Hey, I'm using an Arduino Duemilanove (http://www.arduino.cc/en/Main/ArduinoBoardDuemilanove).
I want to use it to communicate with a DCE using RS232. I've already tried using a MAX232A chip to convert TTL voltages to RS232 voltages using this: http://www.arduino.cc/en/Tutorial/ArduinoSoftwareRS232. But I want to be able to do that without creating prototype circuits.
So I bought a USB to rs232 converter (something like this: http://www.usbgear.com/computer_cable_details.cfm?sku=USBG-RS232-F12&cats=199&catid=482%2C199%2C601%2C461) and plugged it into the usb port of the Arduino (using an A to B type usb converter).
I programmed the Arduino to continuously send stuff through the serial interface, but it doesn't seem to send anything when I use the adapter.
When I plug the adapter to the USB port of my computer and the rs232 end to a DCE, it seems to work fine (after I installed the ftdi driver).
So my question is: Do I need an equivalent of the ftdi driver on the Arduino for it to be able to communicate through that adapter?
When I connect the Arduino to the computer using the normal USB cable, it starts sending only when I open up the serial monitor in the IDE. So my guess is that something on the other side needs to initiate the communication before the Arduino starts sending. My DCE can't do that.. so is there some way to make the Arduino to just send data without anything on the other side?