Serial Interface

There are two serial ports available for use. The GPIO port can also be used as a serial port, with less functionality.

Model	Primary Port	Auxiliary Port	GPIO Port
Certus	ANPP only over UART. No dynamic pin functions	ANPP over UART, Dynamic Pin Functions	ANPP over RS232, Dynamic Pin Functions

I/O Ports Available

Baud Rate

The default baud rate of Certus is 115,200. The primary and auxiliary port baud rate can be set anywhere from 4,800 to 2,000,000 baud and can be modified using the Baud Rates page in the web UI or Certus Manager. The GPIO port baud rate can be set anywhere from 4,800 to 250,000 baud. It is important to select a baud rate that is capable of carrying the amount of data that Certus has been configured to output. See Packet Rates for more details on the data output calculation. The data rate in bytes per second can be calculated by dividing the baud rate by 10. For example if the baud rate is 115,200, the data rate is 11,520 bytes per second. If the selected data rate is insufficient, data may be lost without warning.

The support team can provide a baud rate calculator if it is required. For more information or assistance, contact technical support via email at support@advancednavigation.com.

Format

The format is fixed at 1 start bit, 8 data bits, 1 stop bit and no parity. See Advanced Navigation Packet Protocol for details on the ANPP protocol.