GPS Tracker (ublox neo 6/7 + ESP8266), https://www.youtube.com/watch?v=wlQ7ku758T4

gpstest2.ino

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <NMEAGPS.h>
#include <SoftwareSerial.h>

/**
 * Required libs (see manager):
 *   - SoftwareSerial
 *   - NeoGPS
 */

#define RTCMEMORYSTART 65

extern "C" {
#include "user_interface.h"
}

//WiFi
const char* ssid = "freifunk-myk.de";
const char* pass = "";

//URL of ownTracks Recorder
const char* owntracksURL = "http://adlerweb-vm-owntracks.ffmyk:8083/pub";

//User and Device for ownTracks
const char* owntracksUser   = "esp8266-1";
const char* owntracksDevice = "esp8266-1";

//Sleep between GNSS checks in minutes
//const unsigned int sleep_off = 5;
const unsigned int sleep_off = 1;

//Time for GNSS warm-up in seconds
//const unsigned int sleep_GNSS = 30;
const unsigned int sleep_GNSS = 10;

//Time to wait for 3D-Fix before reverting to 2D in seconds
const unsigned int sleep_3d  = 30;

//Time to wait for 2D-Fix before reverting to RF in seconds
const unsigned int sleep_2d  = 60;

//RF Geolocation Todo https://github.com/m0xpd/ESP8266-GeoLocation/blob/master/ESP8266_GeoLocate_2.ino

//Geo-deviation in deg-fract(?)
const unsigned int fence = 5000;

//Force update after x minutes
const unsigned int rf_force = 720;

//Time to wait for RF-Connect before giving up in seconds
const unsigned int rf_timeout = 60;

//GNSS Power Switch
#define GNSS_PWR_PIN D4
#define GNSS_PWR_ON  LOW

//Software UART for GNSS (RX, TX)
SoftwareSerial GNSSPort(D7, D8);
#define GNSS_BAUD 115200

//Hardware UART for Debug
#define DEBUG_PORT Serial
#define DEBUG_BAUD 115200

//Write all data when received
#define DEBUG_DUMP 0

NMEAGPS GNSS;
gps_fix fix;
int32_t lon=0, lat=0;
float vel=0,alt=0,cog=0;

bool delayGNSS(uint32_t dly) {
  return delayGNSS(dly, false);
}

bool delayGNSS(int32_t dly, bool direct) {
  unsigned long mstop = millis()+dly;
  bool ret = false;

  if(DEBUG_DUMP > 1) DEBUG_PORT.print(F("\nS:"));
  if(DEBUG_DUMP > 1) DEBUG_PORT.print(dly);

  do {
    if (GNSS.available( GNSSPort )) {
      fix = GNSS.read();
      ret = true;
      if(DEBUG_DUMP > 1) DEBUG_PORT.print('!');
    }
  }while(!ret && mstop > millis());

  if (fix.valid.heading) cog = fix.heading();
  if (fix.valid.speed) vel = fix.speed_kph();
  if (fix.valid.altitude) alt = fix.altitude();
  if (fix.valid.location) {
    lon = fix.longitudeL();
    lat = fix.latitudeL();
  }
  

  if(!ret) return false;
  if(!direct) {
    if(DEBUG_DUMP > 1) DEBUG_PORT.print('+');
    if(DEBUG_DUMP > 1) DEBUG_PORT.print(mstop-millis());
    delay((mstop-millis()));
  }
  return true;
}

bool getGNSS(void) {
  bool ret;
  if(delayGNSS(100, true)) {
    if(DEBUG_DUMP > 0) debugDump();
    return true;
  }
  return false;
}

bool wait_3d(void) {
  DEBUG_PORT.print(F("Waiting 3D Fix..."));
  for (unsigned int sec = 0; sec < sleep_3d; sec++) {
    if(getGNSS() && lon != 0 && lat != 0 && alt != 0) {
      DEBUG_PORT.println(F("OK"));
      return true;
    }
    Serial.print('.');
    yield();
    delayGNSS(1000);
  }
  DEBUG_PORT.println(F("NOPE"));
  return false;
}

bool wait_2d(void) {
  DEBUG_PORT.print(F("Waiting 2D Fix..."));
  for (unsigned int sec = 0; sec < sleep_2d; sec++) {
    if(getGNSS() && lon != 0 && lat != 0) {
      DEBUG_PORT.println(F("OK"));
      return true;
    }
    Serial.print('.');
    yield();
    delayGNSS(1000);
  }
  DEBUG_PORT.println(F("NOPE"));
  return false;
}

byte getBattery(void) {
  //@TODO not yet implemented
  return 100;
}

String getGeoDecimal(int32_t location) {
  unsigned long tmp1, tmp2;
  String out = "";

  if (location < 0) {
    out += '-';
    location = 0 - location;
  }

  tmp1 = location / 10000000;
  tmp2 = location - (tmp1 * 10000000);

  out += tmp1;
  out += ".";
  out += tmp2;

  return out;
}

bool getFence(void) {
  int32_t check = 0;
  DEBUG_PORT.print(F("FENCE - "));

  //Lat
  DEBUG_PORT.print(F("LAT:"));
  system_rtc_mem_read(RTCMEMORYSTART + 1, (int32_t *)check, 4);
  DEBUG_PORT.print(check);
  DEBUG_PORT.print('/');
  DEBUG_PORT.print(lat);
  if (check + fence > lat || check - fence < lat) {
    DEBUG_PORT.println('!');
    return true;
  }
  //Lon
  DEBUG_PORT.print(F(" - LON:"));
  system_rtc_mem_read(RTCMEMORYSTART + 2, (int32_t *)check, 4);
  DEBUG_PORT.print(check);
  DEBUG_PORT.print('/');
  DEBUG_PORT.print(lon);
  if (check + fence > lon || check - fence < lon) {
    DEBUG_PORT.println('!');
    return true;
  }

  DEBUG_PORT.println('_');
  return false;
}

NeoGPS::clock_t getTimestamp(void) {
  if (!fix.valid.date || !fix.valid.time) return 0;

  //This contains the seconds starting from the start of this century
  NeoGPS::clock_t seconds = fix.dateTime;

  //Guessing we're still 20xx this is the unix timestamp for 01.01.2000 00:00:00
  seconds += 946684800;

  return seconds;
}

bool rfConnect(void) {
  unsigned int rftimer;
  
  if(WiFi.status() == WL_CONNECTED) return true;
  
  DEBUG_PORT.print(F("connecting to "));
  DEBUG_PORT.println(ssid);
  if(pass == "") {
    WiFi.begin(ssid);
  }else{
    WiFi.begin(ssid, pass);
  }
  while (WiFi.status() != WL_CONNECTED && rftimer < rf_timeout) {
    delay(1000);
    DEBUG_PORT.print(".");
    rftimer++;
    yield();
  }
  if (WiFi.status() != WL_CONNECTED) {
    DEBUG_PORT.println(F("failed"));
    return false;
  }
  DEBUG_PORT.println(F("connected"));
  DEBUG_PORT.print(F("IP address: "));
  DEBUG_PORT.println(WiFi.localIP());
  return true;
}

void rfDisconnect(void) {
  /*WiFi.disconnect();
  WiFi.mode(WIFI_OFF);
  WiFi.forceSleepBegin();*/
}

bool rfSend(void) {
  String data;
  HTTPClient http;

  if (!rfConnect()) return false;
  if (lat == 0 || lon == 0) return false;

  http.begin(owntracksURL);

  http.addHeader(F("X-Limit-U"), owntracksUser);
  http.addHeader(F("X-Limit-D"), owntracksDevice);
  http.addHeader(F("User-Agent"), F("Adlerweb-ESP-Tracker"));
  http.addHeader(F("Content-Type"), F("application/json"));

  data  = "{\"_type\":\"location\",\"tid\":\"01\",\"conn\":\"m\",\"_cp\":true,\"batt\":";
  data += getBattery();
  data += ",\"lat\":";

  data += getGeoDecimal(lat);
  data += ",\"lon\":";
  data += getGeoDecimal(lon);

  if (cog != 0) {
    data += ",\"cog\":";
    data += cog;
  }

  if (vel != 0) {
    data += ",\"vel\":";
    data += vel;
  }

  if (alt != 0) {
    data += ",\"alt\":";
    data += alt;
  }

  data += ",\"tst\":";
  data += getTimestamp();
  data += "}";

  DEBUG_PORT.println(F("---"));
  DEBUG_PORT.println(data);
  DEBUG_PORT.println(F("---"));
  DEBUG_PORT.println(F("Send"));
  DEBUG_PORT.flush();
  http.POST(data);
  DEBUG_PORT.println(".");
  DEBUG_PORT.flush();
  http.writeToStream(&Serial);
  DEBUG_PORT.println(".");
  DEBUG_PORT.flush();
  http.end();
  DEBUG_PORT.println(F("OK"));
  DEBUG_PORT.flush();

  rfDisconnect();

  return true;
}

void debugDump() {
  DEBUG_PORT.print(F("Status: "));
  switch (fix.status) {
    case 1:
      DEBUG_PORT.println(F("Nährungswert"));
      break;
    case 2:
      DEBUG_PORT.println(F("Nur Zeit"));
      break;
    case 3:
      DEBUG_PORT.println(F("GNSS-Fix"));
      break;
    case 4:
      DEBUG_PORT.println(F("DGNSS-Fix"));
      break;
    default:
      DEBUG_PORT.println(F("Keiner"));
  }
  DEBUG_PORT.print(F("UTC: "));
  DEBUG_PORT.print(fix.dateTime.year);
  DEBUG_PORT.print("-");
  DEBUG_PORT.print(fix.dateTime.month);
  DEBUG_PORT.print("-");
  DEBUG_PORT.print(fix.dateTime.date);
  DEBUG_PORT.print(" ");
  DEBUG_PORT.print(fix.dateTime.hours);
  DEBUG_PORT.print(":");
  DEBUG_PORT.print(fix.dateTime.minutes);
  DEBUG_PORT.print(":");
  DEBUG_PORT.print(fix.dateTime.seconds);
  DEBUG_PORT.print(" - ");
  DEBUG_PORT.print(getTimestamp());
  DEBUG_PORT.print("/");
  //DEBUG_PORT.println(lasttime);

  DEBUG_PORT.print(F("Satellites: "));
  DEBUG_PORT.println(fix.satellites);

  DEBUG_PORT.print(F("Speed: "));
  DEBUG_PORT.println(vel);

  DEBUG_PORT.print(F("Heading: "));
  DEBUG_PORT.println(cog);

  DEBUG_PORT.print(F("Altitude: "));
  DEBUG_PORT.println(alt);

  DEBUG_PORT.print(F("Postition: "));
  DEBUG_PORT.print(lat);
  DEBUG_PORT.print(",");
  DEBUG_PORT.println(lon);

  DEBUG_PORT.print(getGeoDecimal(lat));
  DEBUG_PORT.print(",");
  DEBUG_PORT.println(getGeoDecimal(lon));
}

byte getBootMode(void) {
  byte bootMode = 0;
  system_rtc_mem_read(RTCMEMORYSTART, &bootMode, 1);
  DEBUG_PORT.print("BootMode: ");
  DEBUG_PORT.println(bootMode);
  return bootMode;
}


/////////////


void setup() {
  int32_t dummy = 0;

  pinMode(GNSS_PWR_PIN, OUTPUT);

  DEBUG_PORT.begin(DEBUG_BAUD);
  GNSSPort.begin(GNSS_BAUD);

  delay(2000);

  DEBUG_PORT.println( F("Adlerweb GNSS Tracker v0.1.1") );
  DEBUG_PORT.flush();

  byte bootMode = getBootMode();

  if(bootMode == 0 || bootMode > 5) { //Unknown or first boot
    DEBUG_PORT.println(F("Enabling GNSS Power"));
    digitalWrite(GNSS_PWR_PIN, GNSS_PWR_ON);
    bootMode=1;
    system_rtc_mem_write(RTCMEMORYSTART, &bootMode, 1);
    DEBUG_PORT.print(F("Sleeping for "));
    DEBUG_PORT.print(sleep_GNSS);
    DEBUG_PORT.println(F(" Seconds"));
    DEBUG_PORT.flush();
    ESP.deepSleep(sleep_GNSS * 1e6);
  }

  if(bootMode == 1) { //Waiting for GNSS 3D Fix
    if (wait_3d()) {
      bootMode = 4;
    } else {
      bootMode++;
    }
  }

  if(bootMode == 2) {//Waiting for GNSS 2D Fix
    if (wait_2d()) {
      bootMode = 4;
    } else {
      bootMode++;
    }
  }
  
  if(bootMode == 3) { //Waiting for RF Fix
    //@TODO Not implemented
    bootMode = 5;
  }

  if(bootMode == 4) { //Fix Aquired - sending
    system_rtc_mem_read(RTCMEMORYSTART + 3, &dummy, 4);
    if (getFence() || dummy + (rf_force * 60) <= getTimestamp()) {
      bootMode = 5;
      if (rfSend()) {
        system_rtc_mem_write(RTCMEMORYSTART + 1, &lat, 4);
        system_rtc_mem_write(RTCMEMORYSTART + 2, &lon, 4);
        dummy = getTimestamp();
        system_rtc_mem_write(RTCMEMORYSTART + 3, &dummy, 4);
        bootMode = 0;
      } else {
        DEBUG_PORT.println(F("Transfer failed"));
        bootMode = 0;
      }
    }else{
      Serial.println(F("Position unchanged, no transfer"));
      bootMode = 0;
    }
  }

  if(bootMode == 5) { //No fix
    debugDump();
    bootMode = 0;
  }
  
  system_rtc_mem_write(RTCMEMORYSTART, &bootMode, 1);
}

void loop() {
  DEBUG_PORT.println(F("Disabling GNSS Power"));
  digitalWrite(GNSS_PWR_PIN, !GNSS_PWR_ON);
  DEBUG_PORT.print(F("Sleeping for "));
  DEBUG_PORT.print(sleep_off);
  DEBUG_PORT.println(F(" Minutes"));
  DEBUG_PORT.flush();
  ESP.deepSleep(sleep_off * 60e6);
}

Wieder prima gemacht!