update the baud rate using a PUBX command echo -e "\$PUBX,41,1,0007,0003,19200,0*25\r\n" > /dev/serial0 then update the update rate, using uBlox protocol, this will change to 5Hz echo -e "\xB5\x62\x06\x08\x06\x00\xC8\x00\x01\x00\x01\x00\xDE\x6A\r\n" > /dev/serial0