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in the offshore model the keypad interface ,lcd interface and zigbee interface is done. its receiving the gps data from the onshore unit.
in the onshore unit the gps interface , lcd interface and zigbee interface is done. and this unit is transmitting the current gps data to the offshore unit and receiving the destination address typed from the offshore unit .
now we need to compare the current location and destination (lat and long)
and turn the stepper motor for the ruder angle to move from current location to destination location. as its a 8051 we need to use multiplexer as serial controller is not present. taking UART1 for gps ans UART 2 for zigbee in the onshore unit.