How do I change the update rate?

The NMEA sentence update rate can be increased to 10Hz(10 times a second). The default is 1Hz (Once a second).

When increasing the update rate, you will also need to increase the baud rate.

To change the baud rate to 115200;

echo -e -n "\xB5\x62\x06\x00\x14\x00\x01\x00\x00\x00\xD0\x08\x00\x00\x00\xC2\x01\x00\x07\x00\x03\x00\x00\x00\x00\x00\xC0\x7E" > /dev/serial0

 

If you need to update the speed on the Raspberry Pi serial port, you can use;

stty -F /dev/serial0 115200

 

To increase update rate to 2Hz;

echo -e -n "\xB5\x62\x06\x08\x06\x00\xF4\x01\x01\x00\x01\x00\x0B\x77" > /dev/serial0

 

To increase update rate to 5Hz;

echo -e "\xB5\x62\x06\x08\x06\x00\xC8\x00\x01\x00\x01\x00\xDE\x6A > /dev/serial0

 

To increase update rate to 10Hz;

echo -e "\xB5\x62\x06\x08\x06\x00\x64\x00\x01\x00\x01\x00\x7A\x12" > /dev/serial0

 

 

In uCenter, the setting can be found under UBX -> CFG -> RATE
uCenter update rate

The UBX protocol is documented here.