Configuring I2C(Raspberry Pi)

Run sudo raspi-config and follow the prompts to install i2c support for the ARM core and linux kernel Go to Interfacing Options

then I2C

Enable!

Done!

Replace /boot/overlays/sc16is752-i2c.dtbo(Raspberry Pi) 

Replace /boot/overlays/sc16is752-i2c.dtbo file with this file: File:Sc16is752-i2c.zip

Modify /boot/config.txt file and add following parameter:

 dtoverlay=sc16is752-i2c 

How to use GPS Module with gpsd(Raspberry Pi) 

A) First, replace the /boot/overlays/sc16is752-i2c.dtbo and make sure I2C is working properly.

1. Replace sc16is752-i2c.dtbo 
2. Configuring I2C 

B)Install gpsd tools.

sudo apt install gpsd gpsd-clients

C)Modify /etc/default/gpsd file and add following parameters:

DEVICES="/dev/ttySC1"
GPSD_OPTIONS="-F /var/run/gpsd.sock"

D)Enter command i2cset -y 1 0x16 0x23 0x40 to reset the GPRS module.

E)Python Script For Open GPS:

import serial
import os
import time

# Restart gpsd service.
os.system("sudo systemctl restart gpsd.socket")
# Open serial port  ser = serial.Serial('/dev/ttySC0', 115200)

i = 0

if ser.isOpen == False:
    ser.open()
try:
    print("Turn on GPS...")
    while True:
        ser.write(str.encode("AT+GPS=1\r"))
        size = ser.inWaiting()
         if size != 0:
            ticks = time.time()
            response = ser.read(size)
            gps = str(response,encoding="utf-8")
            if(gps.find("OK") != -1):
                os.system("sudo cgps -s")
                  exit()
            else:
                i = i + 1
                print("Waiting GPS Enable, If the time is too long, Please test outdoors:" + str(i))
                ser.flushInput()                 time.sleep(1)
 except KeyboardInterrupt:
    ser.flushInput()
    ser.close()

F)Save it and execute it:

python3 GPS.py 

How to use GPS Module with C(Raspberry Pi)

A)Install gpsd tools.

sudo apt-get install libgps-dev

B)Create source code and name it "gps.c"

#include <gps.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>

int main()
{   int rc;
   struct timeval tv;
   struct gps_data_t gps_data;
   if ((rc = gps_open("localhost", "2947", &gps_data)) == -1)
   {
      printf("code: %d, reason: %s\n", rc, gps_errstr(rc));
      return EXIT_FAILURE;
   }
      gps_stream(&gps_data, WATCH_ENABLE | WATCH_JSON, NULL);
   while (1)
   {
      /* wait for 2 seconds to receive data */
      if (gps_waiting(&gps_data, 2000000))
      {
         /* read data */
         if ((rc = gps_read(&gps_data)) == -1)
         {
            printf("error occured reading gps data. code: %d, reason: %s\n", rc, gps_errstr(rc));
         }
         else 
        {
            /* Display data from the GPS receiver. */
            if ((gps_data.status == STATUS_FIX) && (gps_data.fix.mode == MODE_2D || gps_data.fix.mode == MODE_3D) && !isnan(gps_data.fix.latitude) && !isnan(gps_data.fix.longitude))
            {
               /* gettimeofday(&tv, NULL); EDIT: tv.tv_sec isn't actually the timestamp! */
               printf("latitude: %f, longitude: %f, speed: %f, timestamp: %lf\n", gps_data.fix.latitude, gps_data.fix.longitude, gps_data.fix.speed, gps_data.fix.time);
              //EDIT: Replaced tv.tv_sec with gps_data.fix.time
            }
            else
            {
               printf("no GPS data available\n");
            }
         }
      }
      sleep(3);
   } 
  /* When you are done... */
   gps_stream(&gps_data, WATCH_DISABLE, NULL);
   gps_close(&gps_data);
   return EXIT_SUCCESS;
}

Compile!

gcc gps.c -lm -lgps -o gps

Exec It!

./gps

How to use GPS Module with Python(Raspberry Pi)

The following code is recommended to be executed using Python 3 and install the gpsd-py3 library and GPS 2D/3D Fix:

import gpsd

# Connect to the local gpsd
gpsd.connect()

# Get gps position
packet = gpsd.get_current()

# See the inline docs for GpsResponse for the available data
print(packet.position())