GPS Tracker with Arduino MKR FOX 1200

Sending accurate float:32 GPS data via the Sigfox network.

Aug 19, 2018

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sigfox

tracking

Components and supplies

General Purpose Transistor NPN

GPS Module (Generic)

Resistor 1k ohm

Arduino MKR Fox 1200

Project description

Code

MKRFOX GPS Tracker

arduino

1#include <SigFox.h>
2#include <ArduinoLowPower.h>
3#include <TinyGPS.h>//incluimos   TinyGPS
4
5#define WAITING_TIME 15
6#define GPS_PIN 2
7#define GPS_INFO_BUFFER_SIZE   128
8
9bool debug = false;
10
11TinyGPS gps;//GPS Object
12
13//GPS data   variables
14int year;
15byte month, day, hour, minute, second, hundredths;
16unsigned   long chars;
17unsigned short sentences, failed_checksum;
18char GPS_info_char;
19char   GPS_info_buffer[GPS_INFO_BUFFER_SIZE];
20unsigned int received_char;
21bool message_started   = false;
22int i = 0;
23
24// GPS coordinate structure, 12 bytes size on 32 bits   platforms
25struct gpscoord {
26  float a_latitude;  // 4 bytes
27  float a_longitude;   // 4 bytes
28  float a_altitude;  // 4 bytes
29};
30
31float latitude  = 0.0f;
32float   longitude = 0.0f;
33float altitud = 0;
34
35
36//////////////// Waiting function   //////////////////
37void Wait(int m, bool s) {
38  //m minutes to wait
39  //s   slow led pulses
40  if (debug) {
41    Serial.print("Waiting: "); Serial.print(m);   Serial.println(" min.");
42  }
43
44  digitalWrite(LED_BUILTIN, LOW);
45
46   if (s) {
47
48    int seg = m * 30;
49    for (int i = 0; i < seg; i++) {
50       digitalWrite(LED_BUILTIN, HIGH); //LED on
51      delay(1000);
52      digitalWrite(LED_BUILTIN,   LOW); //LED off
53      delay(1000);
54    }
55
56  } else {
57    int seg   = m * 15;
58    for (int i = 0; i < seg; i++) {
59      digitalWrite(LED_BUILTIN,   HIGH); //LED on
60      delay(1000);
61      digitalWrite(LED_BUILTIN, LOW); //LED   off
62      delay(3000);
63
64    }
65  }
66}
67
68/////////////////// Sigfox   Send Data function ////////////////
69void SendSigfox(String data) {
70  if (debug)   {
71    Serial.print("Sending: "); Serial.println(data);
72    if (data.length()   > 12) {
73      Serial.println("Message too long, only first 12 bytes will be   sent");
74    }
75  }
76
77  // Remove EOL
78  //data.trim();
79
80  //   Start the module
81  SigFox.begin();
82  // Wait at least 30mS after first configuration   (100mS before)
83  delay(100);
84  // Clears all pending interrupts
85  SigFox.status();
86   delay(1);
87  if (debug) SigFox.debug();
88  delay(100);
89
90  SigFox.beginPacket();
91   SigFox.print(data);
92
93
94  if (debug) {
95    int ret = SigFox.endPacket(true);   // send buffer to SIGFOX network and wait for a response
96    if (ret > 0) {
97       Serial.println("No transmission");
98    } else {
99      Serial.println("Transmission   ok");
100    }
101
102    Serial.println(SigFox.status(SIGFOX));
103    Serial.println(SigFox.status(ATMEL));
104
105     if (SigFox.parsePacket()) {
106      Serial.println("Response from server:");
107       while (SigFox.available()) {
108        Serial.print("0x");
109        Serial.println(SigFox.read(),   HEX);
110      }
111    } else {
112      Serial.println("Could not get any response   from the server");
113      Serial.println("Check the SigFox coverage in your   area");
114      Serial.println("If you are indoor, check the 20dB coverage or   move near a window");
115    }
116    Serial.println();
117  } else {
118    SigFox.endPacket();
119   }
120  SigFox.end();
121}
122
123
124//////////////////  Convert GPS function   //////////////////
125/* Converts GPS float data to Char data */
126
127String   ConvertGPSdata(const void* data, uint8_t len) {
128  uint8_t* bytes = (uint8_t*)data;
129   String cadena ;
130  if (debug) {
131    Serial.print("Length: "); Serial.println(len);
132   }
133
134  for (uint8_t i = len - 1; i < len; --i) {
135    if (bytes[i] < 12)   {
136      cadena.concat(byte(0)); // Not tested
137    }
138    cadena.concat(char(bytes[i]));
139     if (debug) Serial.print(bytes[i], HEX);
140  }
141
142  if (debug) {
143    Serial.println("");
144     Serial.print("String to send: "); Serial.println(cadena);
145  }
146
147  return   cadena;
148}
149
150
151////////////////////////// Get GPS position function/////////////////////
152String   GetGPSpositon() {
153
154  int messages_count = 0;
155  String pos;
156
157  if   (debug) Serial.println("GPS ON");
158  digitalWrite(GPS_PIN, HIGH); //Turn GPS   on
159  Wait(1, false);
160  while (messages_count < 5000) {
161    while (Serial1.available())   {
162
163      int GPS_info_char = Serial1.read();
164
165      if (GPS_info_char   == '$') messages_count ++; // start of message. Counting messages.
166
167
168      if   (debug) {
169        if (GPS_info_char == '$') { // start of message
170          message_started   = true;
171          received_char = 0;
172        } else if (GPS_info_char == '*')   { // end of message
173          for (i = 0; i < received_char; i++) {
174            Serial.write(GPS_info_buffer[i]);   // writes the message to the PC once it has been completely received
175          }
176           Serial.println();
177          message_started = false; // ready for the   new message
178        } else if (message_started == true) { // the message is already   started and I got a new character
179          if (received_char <= GPS_INFO_BUFFER_SIZE)   { // to avoid buffer overflow
180            GPS_info_buffer[received_char] = GPS_info_char;
181             received_char++;
182          } else { // resets everything (overflow   happened)
183            message_started = false;
184            received_char =   0;
185          }
186        }
187      }
188
189      if (gps.encode(GPS_info_char))   {
190        gps.f_get_position(&latitude, &longitude);
191        altitud = gps.altitude()   / 100;
192
193        // Store coordinates into dedicated structure
194        gpscoord   coords = {altitud, longitude, latitude};
195
196        gps.crack_datetime(&year,   &month, &day, &hour, &minute, &second, &hundredths);
197
198        if (debug) {
199           Serial.println();
200          Serial.println();
201          Serial.print("Latitud/Longitud:   ");
202          Serial.print(latitude, 5);
203          Serial.print(", ");
204           Serial.println(longitude, 5);
205          Serial.println();
206          Serial.print("Fecha:   "); Serial.print(day, DEC); Serial.print("/");
207          Serial.print(month,   DEC); Serial.print("/"); Serial.print(year);
208          Serial.print(" Hora:   "); Serial.print(hour, DEC); Serial.print(":");
209          Serial.print(minute,   DEC); Serial.print(":"); Serial.print(second, DEC);
210          Serial.print(".");   Serial.println(hundredths, DEC);
211          Serial.print("Altitud (metros): ");   Serial.println(gps.f_altitude());
212          Serial.print("Rumbo (grados): ");   Serial.println(gps.f_course());
213          Serial.print("Velocidad(kmph): ");   Serial.println(gps.f_speed_kmph());
214          Serial.print("Satelites: ");   Serial.println(gps.satellites());
215          Serial.println();
216
217        }
218
219         gps.stats(&chars, &sentences, &failed_checksum);
220        if (debug) Serial.println("GPS   turned off");
221        digitalWrite(GPS_PIN, LOW); //GPS turned off
222        pos   = ConvertGPSdata(&coords, sizeof(gpscoord)); //Send data
223        return pos;
224
225       }
226
227    }
228  }
229  pos = "No Signal";
230}
231
232
233
234
235//////////////////SETUP///////////////////
236
237void   setup() {
238  if (debug) {
239    Serial.begin(9600);
240    while (!Serial) {}//   wait for serial port to connect. Needed for native USB port only
241    Serial.println("Serial   Connected");
242  }
243
244  //Serial1 pins 13-14 for 3.3V connection to GPS.
245   Serial1.begin(9600);
246  while (!Serial1) {}
247  if (debug) {
248    Serial.println("GPS   Connected");
249  }
250
251  pinMode(GPS_PIN, OUTPUT); //pin de interruptor del   GPS
252
253  if (!SigFox.begin()) {
254    Serial.println("Shield error or not   present!");
255    return;
256  }
257
258  // Enable debug led and disable automatic   deep sleep
259  if (debug) {
260    SigFox.debug();
261  } else {
262    SigFox.end();   // Send the module to the deepest sleep
263  }
264
265
266}
267
268
269
270//////////////////////LOOP////////////////////////
271
272void   loop() {
273
274  String position_data;
275
276  position_data = GetGPSpositon();
277   SendSigfox(position_data);
278
279  Wait(WAITING_TIME, false);
280
281
282}
283
284

#include <SigFox.h>
#include <ArduinoLowPower.h>
#include <TinyGPS.h>//incluimos   TinyGPS

#define WAITING_TIME 15
#define GPS_PIN 2
#define GPS_INFO_BUFFER_SIZE   128

bool debug = false;

TinyGPS gps;//GPS Object

//GPS data   variables
int year;
byte month, day, hour, minute, second, hundredths;
unsigned   long chars;
unsigned short sentences, failed_checksum;
char GPS_info_char;
char   GPS_info_buffer[GPS_INFO_BUFFER_SIZE];
unsigned int received_char;
bool message_started   = false;
int i = 0;

// GPS coordinate structure, 12 bytes size on 32 bits   platforms
struct gpscoord {
  float a_latitude;  // 4 bytes
  float a_longitude;   // 4 bytes
  float a_altitude;  // 4 bytes
};

float latitude  = 0.0f;
float   longitude = 0.0f;
float altitud = 0;


//////////////// Waiting function   //////////////////
void Wait(int m, bool s) {
  //m minutes to wait
  //s   slow led pulses
  if (debug) {
    Serial.print("Waiting: "); Serial.print(m);   Serial.println(" min.");
  }

  digitalWrite(LED_BUILTIN, LOW);

   if (s) {

    int seg = m * 30;
    for (int i = 0; i < seg; i++) {
       digitalWrite(LED_BUILTIN, HIGH); //LED on
      delay(1000);
      digitalWrite(LED_BUILTIN,   LOW); //LED off
      delay(1000);
    }

  } else {
    int seg   = m * 15;
    for (int i = 0; i < seg; i++) {
      digitalWrite(LED_BUILTIN,   HIGH); //LED on
      delay(1000);
      digitalWrite(LED_BUILTIN, LOW); //LED   off
      delay(3000);

    }
  }
}

/////////////////// Sigfox   Send Data function ////////////////
void SendSigfox(String data) {
  if (debug)   {
    Serial.print("Sending: "); Serial.println(data);
    if (data.length()   > 12) {
      Serial.println("Message too long, only first 12 bytes will be   sent");
    }
  }

  // Remove EOL
  //data.trim();

  //   Start the module
  SigFox.begin();
  // Wait at least 30mS after first configuration   (100mS before)
  delay(100);
  // Clears all pending interrupts
  SigFox.status();
   delay(1);
  if (debug) SigFox.debug();
  delay(100);

  SigFox.beginPacket();
   SigFox.print(data);


  if (debug) {
    int ret = SigFox.endPacket(true);   // send buffer to SIGFOX network and wait for a response
    if (ret > 0) {
       Serial.println("No transmission");
    } else {
      Serial.println("Transmission   ok");
    }

    Serial.println(SigFox.status(SIGFOX));
    Serial.println(SigFox.status(ATMEL));

     if (SigFox.parsePacket()) {
      Serial.println("Response from server:");
       while (SigFox.available()) {
        Serial.print("0x");
        Serial.println(SigFox.read(),   HEX);
      }
    } else {
      Serial.println("Could not get any response   from the server");
      Serial.println("Check the SigFox coverage in your   area");
      Serial.println("If you are indoor, check the 20dB coverage or   move near a window");
    }
    Serial.println();
  } else {
    SigFox.endPacket();
   }
  SigFox.end();
}


//////////////////  Convert GPS function   //////////////////
/* Converts GPS float data to Char data */

String   ConvertGPSdata(const void* data, uint8_t len) {
  uint8_t* bytes = (uint8_t*)data;
   String cadena ;
  if (debug) {
    Serial.print("Length: "); Serial.println(len);
   }

  for (uint8_t i = len - 1; i < len; --i) {
    if (bytes[i] < 12)   {
      cadena.concat(byte(0)); // Not tested
    }
    cadena.concat(char(bytes[i]));
     if (debug) Serial.print(bytes[i], HEX);
  }

  if (debug) {
    Serial.println("");
     Serial.print("String to send: "); Serial.println(cadena);
  }

  return   cadena;
}


////////////////////////// Get GPS position function/////////////////////
String   GetGPSpositon() {

  int messages_count = 0;
  String pos;

  if   (debug) Serial.println("GPS ON");
  digitalWrite(GPS_PIN, HIGH); //Turn GPS   on
  Wait(1, false);
  while (messages_count < 5000) {
    while (Serial1.available())   {

      int GPS_info_char = Serial1.read();

      if (GPS_info_char   == '$') messages_count ++; // start of message. Counting messages.


      if   (debug) {
        if (GPS_info_char == '$') { // start of message
          message_started   = true;
          received_char = 0;
        } else if (GPS_info_char == '*')   { // end of message
          for (i = 0; i < received_char; i++) {
            Serial.write(GPS_info_buffer[i]);   // writes the message to the PC once it has been completely received
          }
           Serial.println();
          message_started = false; // ready for the   new message
        } else if (message_started == true) { // the message is already   started and I got a new character
          if (received_char <= GPS_INFO_BUFFER_SIZE)   { // to avoid buffer overflow
            GPS_info_buffer[received_char] = GPS_info_char;
             received_char++;
          } else { // resets everything (overflow   happened)
            message_started = false;
            received_char =   0;
          }
        }
      }

      if (gps.encode(GPS_info_char))   {
        gps.f_get_position(&latitude, &longitude);
        altitud = gps.altitude()   / 100;

        // Store coordinates into dedicated structure
        gpscoord   coords = {altitud, longitude, latitude};

        gps.crack_datetime(&year,   &month, &day, &hour, &minute, &second, &hundredths);

        if (debug) {
           Serial.println();
          Serial.println();
          Serial.print("Latitud/Longitud:   ");
          Serial.print(latitude, 5);
          Serial.print(", ");
           Serial.println(longitude, 5);
          Serial.println();
          Serial.print("Fecha:   "); Serial.print(day, DEC); Serial.print("/");
          Serial.print(month,   DEC); Serial.print("/"); Serial.print(year);
          Serial.print(" Hora:   "); Serial.print(hour, DEC); Serial.print(":");
          Serial.print(minute,   DEC); Serial.print(":"); Serial.print(second, DEC);
          Serial.print(".");   Serial.println(hundredths, DEC);
          Serial.print("Altitud (metros): ");   Serial.println(gps.f_altitude());
          Serial.print("Rumbo (grados): ");   Serial.println(gps.f_course());
          Serial.print("Velocidad(kmph): ");   Serial.println(gps.f_speed_kmph());
          Serial.print("Satelites: ");   Serial.println(gps.satellites());
          Serial.println();

        }

         gps.stats(&chars, &sentences, &failed_checksum);
        if (debug) Serial.println("GPS   turned off");
        digitalWrite(GPS_PIN, LOW); //GPS turned off
        pos   = ConvertGPSdata(&coords, sizeof(gpscoord)); //Send data
        return pos;

       }

    }
  }
  pos = "No Signal";
}




//////////////////SETUP///////////////////

void   setup() {
  if (debug) {
    Serial.begin(9600);
    while (!Serial) {}//   wait for serial port to connect. Needed for native USB port only
    Serial.println("Serial   Connected");
  }

  //Serial1 pins 13-14 for 3.3V connection to GPS.
   Serial1.begin(9600);
  while (!Serial1) {}
  if (debug) {
    Serial.println("GPS   Connected");
  }

  pinMode(GPS_PIN, OUTPUT); //pin de interruptor del   GPS

  if (!SigFox.begin()) {
    Serial.println("Shield error or not   present!");
    return;
  }

  // Enable debug led and disable automatic   deep sleep
  if (debug) {
    SigFox.debug();
  } else {
    SigFox.end();   // Send the module to the deepest sleep
  }


}



//////////////////////LOOP////////////////////////

void   loop() {

  String position_data;

  position_data = GetGPSpositon();
   SendSigfox(position_data);

  Wait(WAITING_TIME, false);


}

MKRFOX GPS Tracker

arduino

1#include <SigFox.h>
2#include <ArduinoLowPower.h>
3#include <TinyGPS.h>//incluimos  TinyGPS
4
5#define WAITING_TIME 15
6#define GPS_PIN 2
7#define GPS_INFO_BUFFER_SIZE  128
8
9bool debug = false;
10
11TinyGPS gps;//GPS Object
12
13//GPS data  variables
14int year;
15byte month, day, hour, minute, second, hundredths;
16unsigned  long chars;
17unsigned short sentences, failed_checksum;
18char GPS_info_char;
19char  GPS_info_buffer[GPS_INFO_BUFFER_SIZE];
20unsigned int received_char;
21bool message_started  = false;
22int i = 0;
23
24// GPS coordinate structure, 12 bytes size on 32 bits  platforms
25struct gpscoord {
26  float a_latitude;  // 4 bytes
27  float a_longitude;  // 4 bytes
28  float a_altitude;  // 4 bytes
29};
30
31float latitude  = 0.0f;
32float  longitude = 0.0f;
33float altitud = 0;
34
35
36//////////////// Waiting function  //////////////////
37void Wait(int m, bool s) {
38  //m minutes to wait
39  //s  slow led pulses
40  if (debug) {
41    Serial.print("Waiting: "); Serial.print(m);  Serial.println(" min.");
42  }
43
44  digitalWrite(LED_BUILTIN, LOW);
45
46  if (s) {
47
48    int seg = m * 30;
49    for (int i = 0; i < seg; i++) {
50      digitalWrite(LED_BUILTIN, HIGH); //LED on
51      delay(1000);
52      digitalWrite(LED_BUILTIN,  LOW); //LED off
53      delay(1000);
54    }
55
56  } else {
57    int seg  = m * 15;
58    for (int i = 0; i < seg; i++) {
59      digitalWrite(LED_BUILTIN,  HIGH); //LED on
60      delay(1000);
61      digitalWrite(LED_BUILTIN, LOW); //LED  off
62      delay(3000);
63
64    }
65  }
66}
67
68/////////////////// Sigfox  Send Data function ////////////////
69void SendSigfox(String data) {
70  if (debug)  {
71    Serial.print("Sending: "); Serial.println(data);
72    if (data.length()  > 12) {
73      Serial.println("Message too long, only first 12 bytes will be  sent");
74    }
75  }
76
77  // Remove EOL
78  //data.trim();
79
80  //  Start the module
81  SigFox.begin();
82  // Wait at least 30mS after first configuration  (100mS before)
83  delay(100);
84  // Clears all pending interrupts
85  SigFox.status();
86  delay(1);
87  if (debug) SigFox.debug();
88  delay(100);
89
90  SigFox.beginPacket();
91  SigFox.print(data);
92
93
94  if (debug) {
95    int ret = SigFox.endPacket(true);  // send buffer to SIGFOX network and wait for a response
96    if (ret > 0) {
97      Serial.println("No transmission");
98    } else {
99      Serial.println("Transmission  ok");
100    }
101
102    Serial.println(SigFox.status(SIGFOX));
103    Serial.println(SigFox.status(ATMEL));
104
105    if (SigFox.parsePacket()) {
106      Serial.println("Response from server:");
107      while (SigFox.available()) {
108        Serial.print("0x");
109        Serial.println(SigFox.read(),  HEX);
110      }
111    } else {
112      Serial.println("Could not get any response  from the server");
113      Serial.println("Check the SigFox coverage in your  area");
114      Serial.println("If you are indoor, check the 20dB coverage or  move near a window");
115    }
116    Serial.println();
117  } else {
118    SigFox.endPacket();
119  }
120  SigFox.end();
121}
122
123
124//////////////////  Convert GPS function  //////////////////
125/* Converts GPS float data to Char data */
126
127String  ConvertGPSdata(const void* data, uint8_t len) {
128  uint8_t* bytes = (uint8_t*)data;
129  String cadena ;
130  if (debug) {
131    Serial.print("Length: "); Serial.println(len);
132  }
133
134  for (uint8_t i = len - 1; i < len; --i) {
135    if (bytes[i] < 12)  {
136      cadena.concat(byte(0)); // Not tested
137    }
138    cadena.concat(char(bytes[i]));
139    if (debug) Serial.print(bytes[i], HEX);
140  }
141
142  if (debug) {
143    Serial.println("");
144    Serial.print("String to send: "); Serial.println(cadena);
145  }
146
147  return  cadena;
148}
149
150
151////////////////////////// Get GPS position function/////////////////////
152String  GetGPSpositon() {
153
154  int messages_count = 0;
155  String pos;
156
157  if  (debug) Serial.println("GPS ON");
158  digitalWrite(GPS_PIN, HIGH); //Turn GPS  on
159  Wait(1, false);
160  while (messages_count < 5000) {
161    while (Serial1.available())  {
162
163      int GPS_info_char = Serial1.read();
164
165      if (GPS_info_char  == '$') messages_count ++; // start of message. Counting messages.
166
167
168      if  (debug) {
169        if (GPS_info_char == '$') { // start of message
170          message_started  = true;
171          received_char = 0;
172        } else if (GPS_info_char == '*')  { // end of message
173          for (i = 0; i < received_char; i++) {
174            Serial.write(GPS_info_buffer[i]);  // writes the message to the PC once it has been completely received
175          }
176          Serial.println();
177          message_started = false; // ready for the  new message
178        } else if (message_started == true) { // the message is already  started and I got a new character
179          if (received_char <= GPS_INFO_BUFFER_SIZE)  { // to avoid buffer overflow
180            GPS_info_buffer[received_char] = GPS_info_char;
181            received_char++;
182          } else { // resets everything (overflow  happened)
183            message_started = false;
184            received_char =  0;
185          }
186        }
187      }
188
189      if (gps.encode(GPS_info_char))  {
190        gps.f_get_position(&latitude, &longitude);
191        altitud = gps.altitude()  / 100;
192
193        // Store coordinates into dedicated structure
194        gpscoord  coords = {altitud, longitude, latitude};
195
196        gps.crack_datetime(&year,  &month, &day, &hour, &minute, &second, &hundredths);
197
198        if (debug) {
199          Serial.println();
200          Serial.println();
201          Serial.print("Latitud/Longitud:  ");
202          Serial.print(latitude, 5);
203          Serial.print(", ");
204          Serial.println(longitude, 5);
205          Serial.println();
206          Serial.print("Fecha:  "); Serial.print(day, DEC); Serial.print("/");
207          Serial.print(month,  DEC); Serial.print("/"); Serial.print(year);
208          Serial.print(" Hora:  "); Serial.print(hour, DEC); Serial.print(":");
209          Serial.print(minute,  DEC); Serial.print(":"); Serial.print(second, DEC);
210          Serial.print(".");  Serial.println(hundredths, DEC);
211          Serial.print("Altitud (metros): ");  Serial.println(gps.f_altitude());
212          Serial.print("Rumbo (grados): ");  Serial.println(gps.f_course());
213          Serial.print("Velocidad(kmph): ");  Serial.println(gps.f_speed_kmph());
214          Serial.print("Satelites: ");  Serial.println(gps.satellites());
215          Serial.println();
216
217        }
218
219        gps.stats(&chars, &sentences, &failed_checksum);
220        if (debug) Serial.println("GPS  turned off");
221        digitalWrite(GPS_PIN, LOW); //GPS turned off
222        pos  = ConvertGPSdata(&coords, sizeof(gpscoord)); //Send data
223        return pos;
224
225      }
226
227    }
228  }
229  pos = "No Signal";
230}
231
232
233
234
235//////////////////SETUP///////////////////
236
237void  setup() {
238  if (debug) {
239    Serial.begin(9600);
240    while (!Serial) {}//  wait for serial port to connect. Needed for native USB port only
241    Serial.println("Serial  Connected");
242  }
243
244  //Serial1 pins 13-14 for 3.3V connection to GPS.
245  Serial1.begin(9600);
246  while (!Serial1) {}
247  if (debug) {
248    Serial.println("GPS  Connected");
249  }
250
251  pinMode(GPS_PIN, OUTPUT); //pin de interruptor del  GPS
252
253  if (!SigFox.begin()) {
254    Serial.println("Shield error or not  present!");
255    return;
256  }
257
258  // Enable debug led and disable automatic  deep sleep
259  if (debug) {
260    SigFox.debug();
261  } else {
262    SigFox.end();  // Send the module to the deepest sleep
263  }
264
265
266}
267
268
269
270//////////////////////LOOP////////////////////////
271
272void  loop() {
273
274  String position_data;
275
276  position_data = GetGPSpositon();
277  SendSigfox(position_data);
278
279  Wait(WAITING_TIME, false);
280
281
282}
283
284

#include <SigFox.h>
#include <ArduinoLowPower.h>
#include <TinyGPS.h>//incluimos  TinyGPS

#define WAITING_TIME 15
#define GPS_PIN 2
#define GPS_INFO_BUFFER_SIZE  128

bool debug = false;

TinyGPS gps;//GPS Object

//GPS data  variables
int year;
byte month, day, hour, minute, second, hundredths;
unsigned  long chars;
unsigned short sentences, failed_checksum;
char GPS_info_char;
char  GPS_info_buffer[GPS_INFO_BUFFER_SIZE];
unsigned int received_char;
bool message_started  = false;
int i = 0;

// GPS coordinate structure, 12 bytes size on 32 bits  platforms
struct gpscoord {
  float a_latitude;  // 4 bytes
  float a_longitude;  // 4 bytes
  float a_altitude;  // 4 bytes
};

float latitude  = 0.0f;
float  longitude = 0.0f;
float altitud = 0;


//////////////// Waiting function  //////////////////
void Wait(int m, bool s) {
  //m minutes to wait
  //s  slow led pulses
  if (debug) {
    Serial.print("Waiting: "); Serial.print(m);  Serial.println(" min.");
  }

  digitalWrite(LED_BUILTIN, LOW);

  if (s) {

    int seg = m * 30;
    for (int i = 0; i < seg; i++) {
      digitalWrite(LED_BUILTIN, HIGH); //LED on
      delay(1000);
      digitalWrite(LED_BUILTIN,  LOW); //LED off
      delay(1000);
    }

  } else {
    int seg  = m * 15;
    for (int i = 0; i < seg; i++) {
      digitalWrite(LED_BUILTIN,  HIGH); //LED on
      delay(1000);
      digitalWrite(LED_BUILTIN, LOW); //LED  off
      delay(3000);

    }
  }
}

/////////////////// Sigfox  Send Data function ////////////////
void SendSigfox(String data) {
  if (debug)  {
    Serial.print("Sending: "); Serial.println(data);
    if (data.length()  > 12) {
      Serial.println("Message too long, only first 12 bytes will be  sent");
    }
  }

  // Remove EOL
  //data.trim();

  //  Start the module
  SigFox.begin();
  // Wait at least 30mS after first configuration  (100mS before)
  delay(100);
  // Clears all pending interrupts
  SigFox.status();
  delay(1);
  if (debug) SigFox.debug();
  delay(100);

  SigFox.beginPacket();
  SigFox.print(data);


  if (debug) {
    int ret = SigFox.endPacket(true);  // send buffer to SIGFOX network and wait for a response
    if (ret > 0) {
      Serial.println("No transmission");
    } else {
      Serial.println("Transmission  ok");
    }

    Serial.println(SigFox.status(SIGFOX));
    Serial.println(SigFox.status(ATMEL));

    if (SigFox.parsePacket()) {
      Serial.println("Response from server:");
      while (SigFox.available()) {
        Serial.print("0x");
        Serial.println(SigFox.read(),  HEX);
      }
    } else {
      Serial.println("Could not get any response  from the server");
      Serial.println("Check the SigFox coverage in your  area");
      Serial.println("If you are indoor, check the 20dB coverage or  move near a window");
    }
    Serial.println();
  } else {
    SigFox.endPacket();
  }
  SigFox.end();
}


//////////////////  Convert GPS function  //////////////////
/* Converts GPS float data to Char data */

String  ConvertGPSdata(const void* data, uint8_t len) {
  uint8_t* bytes = (uint8_t*)data;
  String cadena ;
  if (debug) {
    Serial.print("Length: "); Serial.println(len);
  }

  for (uint8_t i = len - 1; i < len; --i) {
    if (bytes[i] < 12)  {
      cadena.concat(byte(0)); // Not tested
    }
    cadena.concat(char(bytes[i]));
    if (debug) Serial.print(bytes[i], HEX);
  }

  if (debug) {
    Serial.println("");
    Serial.print("String to send: "); Serial.println(cadena);
  }

  return  cadena;
}


////////////////////////// Get GPS position function/////////////////////
String  GetGPSpositon() {

  int messages_count = 0;
  String pos;

  if  (debug) Serial.println("GPS ON");
  digitalWrite(GPS_PIN, HIGH); //Turn GPS  on
  Wait(1, false);
  while (messages_count < 5000) {
    while (Serial1.available())  {

      int GPS_info_char = Serial1.read();

      if (GPS_info_char  == '$') messages_count ++; // start of message. Counting messages.


      if  (debug) {
        if (GPS_info_char == '$') { // start of message
          message_started  = true;
          received_char = 0;
        } else if (GPS_info_char == '*')  { // end of message
          for (i = 0; i < received_char; i++) {
            Serial.write(GPS_info_buffer[i]);  // writes the message to the PC once it has been completely received
          }
          Serial.println();
          message_started = false; // ready for the  new message
        } else if (message_started == true) { // the message is already  started and I got a new character
          if (received_char <= GPS_INFO_BUFFER_SIZE)  { // to avoid buffer overflow
            GPS_info_buffer[received_char] = GPS_info_char;
            received_char++;
          } else { // resets everything (overflow  happened)
            message_started = false;
            received_char =  0;
          }
        }
      }

      if (gps.encode(GPS_info_char))  {
        gps.f_get_position(&latitude, &longitude);
        altitud = gps.altitude()  / 100;

        // Store coordinates into dedicated structure
        gpscoord  coords = {altitud, longitude, latitude};

        gps.crack_datetime(&year,  &month, &day, &hour, &minute, &second, &hundredths);

        if (debug) {
          Serial.println();
          Serial.println();
          Serial.print("Latitud/Longitud:  ");
          Serial.print(latitude, 5);
          Serial.print(", ");
          Serial.println(longitude, 5);
          Serial.println();
          Serial.print("Fecha:  "); Serial.print(day, DEC); Serial.print("/");
          Serial.print(month,  DEC); Serial.print("/"); Serial.print(year);
          Serial.print(" Hora:  "); Serial.print(hour, DEC); Serial.print(":");
          Serial.print(minute,  DEC); Serial.print(":"); Serial.print(second, DEC);
          Serial.print(".");  Serial.println(hundredths, DEC);
          Serial.print("Altitud (metros): ");  Serial.println(gps.f_altitude());
          Serial.print("Rumbo (grados): ");  Serial.println(gps.f_course());
          Serial.print("Velocidad(kmph): ");  Serial.println(gps.f_speed_kmph());
          Serial.print("Satelites: ");  Serial.println(gps.satellites());
          Serial.println();

        }

        gps.stats(&chars, &sentences, &failed_checksum);
        if (debug) Serial.println("GPS  turned off");
        digitalWrite(GPS_PIN, LOW); //GPS turned off
        pos  = ConvertGPSdata(&coords, sizeof(gpscoord)); //Send data
        return pos;

      }

    }
  }
  pos = "No Signal";
}




//////////////////SETUP///////////////////

void  setup() {
  if (debug) {
    Serial.begin(9600);
    while (!Serial) {}//  wait for serial port to connect. Needed for native USB port only
    Serial.println("Serial  Connected");
  }

  //Serial1 pins 13-14 for 3.3V connection to GPS.
  Serial1.begin(9600);
  while (!Serial1) {}
  if (debug) {
    Serial.println("GPS  Connected");
  }

  pinMode(GPS_PIN, OUTPUT); //pin de interruptor del  GPS

  if (!SigFox.begin()) {
    Serial.println("Shield error or not  present!");
    return;
  }

  // Enable debug led and disable automatic  deep sleep
  if (debug) {
    SigFox.debug();
  } else {
    SigFox.end();  // Send the module to the deepest sleep
  }


}



//////////////////////LOOP////////////////////////

void  loop() {

  String position_data;

  position_data = GetGPSpositon();
  SendSigfox(position_data);

  Wait(WAITING_TIME, false);


}

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