What is the baud rate used in the RS232?
The AX2550 serial port operates at 9600 bits per second and uses 7-bit, 1 start bit, 1 stop bit and even parity. This rate is equivalent to approximately 1000 characters per second. Considering that a motor command takes 5 characters, the controller can be updated with a new command up to 200 times per second. While serial ports, including the one in the AX2550, could reach significantly higher bit rates, the 9600 value has been selected because it is universally found on all microcontrollers and is the maximum rate supported by many wireless modems.
