Reviewing the GPS module

There are some GPS modules that we can apply on the ESP32 board. The GPS module usually uses the UART interface to communicate to the board. UART is a serial communication model that can send and receive data per byte sequentially. Our board waits for incoming messages from the GPS module via UART.

The following code block is an example of the data output from a GPS module. This data shows that our GPS module cannot detect our location from the satellite. All GPS data is defined in NMEA format; further information about NMEA can be found at http://www.nmea.org/content/nmea_standards/nmea_0183_v_410.asp.

$GPGLL,,,,,,V,N*64 
$GPRMC,,V,,,,,,,,,,N*53 
$GPVTG,,,,,,,,,N*30 
$GPGGA,,,,,,0,00,99.99,,,,,,*48 
$GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30 
$GPGSV,1,1,01,04,,,13*7E 
$GPGLL,,,,,,V,N*64 
$GPRMC,,V,,,,,,,,,,N*53 
$GPVTG,,,,,,,,,N*30

You may not get the position...