Is the device really an RS232 device? The Arduino can not handle an RS232 device directly. The serial signals are the wrong voltage and are inverted. You need a MAX232 chip between the Arduino and any RS232 device to handle the voltage differences.
Is the device really an RS232 device? The Arduino can not handle an RS232 device directly. The serial signals are the wrong voltage and are inverted. You need a MAX232 chip between the Arduino and any RS232 device to handle the voltage differences.