gps定位器是一个被广泛使用的小工具，说不定你老婆就在你的身上放了一个。这玩意很容易买的到。当然自己做一个也可以，毕竟看这内容的人一般都是单身狗。

需要材料，一款diy界网红arduino uno，采用8位AVR单片机，自带bootloader和一大推的支持库。配合arduino开发环境可以快速简单的编写arduino的程序。

一个ICOMSAT扩展板，集成收发短信的sim900模块

一个GPS shield扩展板

这些都是扩展版，直接堆叠插在一起就好了，第一层是arduino uno（这是废话），第二层是ICOMSAT扩展板，第三层是GPS shield扩展板。这就是arduino的魅力，拥有大量的周边扩展模块，直接连接。让没有硬件开发知识人，只要会简单的c语言就可以玩转arduino。

首先对ICOMSAT扩展板操作，开关拨到UART的一端，跳线帽按照RXD->D2，TXD->D3如图，接上GSM天线和插上手机SIM卡。详细跳帽和引脚请下载查阅产品手册和原理图

然后对GPS shield扩展板操作，开关拨到5V，跳线帽按照RXD->D1，TXD->D0如图连接，接上GPS天线

最后按照顺序把三个家伙给堆起来

在编译程序之前我们需要下载arduino的gsm和gps的支持库，解压后放在Arduino\libraries的目录下

下面是程序代码复制粘帖过去IDE中，编译好后下载到arduino中就好了

#include "SIM900.h"

#include

//#include "inetGSM.h"

#include "sms.h"

//#include "call.h"

#include

#include

/* This sample code demonstrates the normal use of a TinyGPS object.

It requires the use of SoftwareSerial, and assumes that you have a

4800-baud serial GPS device hooked up on pins 3(rx) and 4(tx).

*/

TinyGPS gps;

#define ledpin 13

#define pwrkey 27

//**************************************************************************

char sms_rx[122]; //Received text SMS

byte type_sms=SMS_ALL; //Type of SMS

byte del_sms=1; //0: No deleting sms - 1: Deleting SMS

char number_incoming[20];

//**************************************************************************

SMSGSM sms;

int error;

boolean started=false;

bool newData = false;

char gps_year[8];

char gps_mon[3];

char gps_day[3];

char gps_hour[3];

char gps_min[3];

char gps_sec[3];

char gps_lon[20];

char gps_lat[20];

char gps_sms[100];

void setup()

{

//software power sim900 up

pinMode(pwrkey,OUTPUT);

digitalWrite(pwrkey,HIGH);

delay(600);

digitalWrite(pwrkey,LOW);

Serial.begin(115200);

Serial2.begin(9600);

if (gsm.begin(9600)) {

Serial.println("\nstatus=READY");

gsm.forceON(); //To ensure that SIM908 is not only in charge mode

started=true;

} else Serial.println("\nstatus=IDLE");

if(started)

{

//delete all sms message

Serial.println("Deleting SMS");

char error = DeleteAllSMS();

if (error==1)Serial.println("All SMS deleted");

else Serial.println("SMS not deleted");

}

else

{Serial.println("SIM900 NOT EXISTED"); while(1);}

delay(10000);

}

void loop()

{

if(started)

{

check_gps();

Check_SMS();

}

}

void Check_SMS() //Check if there is an sms 'type_sms'

{

char pos_sms_rx; //Received SMS position

pos_sms_rx=sms.IsSMSPresent(type_sms);

if (pos_sms_rx!=0)

{

//Read text/number/position of sms

sms.GetSMS(pos_sms_rx,number_incoming,sms_rx,120);

Serial.print("Received SMS from ");

Serial.print(number_incoming);

Serial.print("(sim position: ");

Serial.print(word(pos_sms_rx));

Serial.println(")");

Serial.println(sms_rx);

if (del_sms==1) //If 'del_sms' is 1, i delete sms

{

error=sms.DeleteSMS(pos_sms_rx);

if (error==1)Serial.println("SMS deleted");

else Serial.println("SMS not deleted");

}

if((strstr(sms_rx,"gps")!=0)&&(strlen(sms_rx)==3))

{

Serial.println("\nsending SMS");

if(newData)

{

if (sms.SendSMS(number_incoming, gps_sms))

Serial.println("\nSMS sent OK");

else

Serial.println("\nSMS sent error");

}

else

{

if (sms.SendSMS(number_incoming, "gps not ready"))

Serial.println("\nSMS sent OK");

else

Serial.println("\nSMS sent error");

}

}

Serial2.flush();

}

newData=false;

return;

}

char check_gps()

{

newData=false;

unsigned long chars;

unsigned short sentences, failed;

// For one second we parse GPS data and report some key values

for (unsigned long start = millis(); millis() - start < 1000;)

{

while (Serial2.available())

{

char c = Serial2.read();

// Serial.write(c); // uncomment this line if you want to see the GPS data flowing

if (gps.encode(c)) // Did a new valid sentence come in?

newData = true;

}

}

if (newData)

{

float flat, flon;

unsigned long age;

int _year;

byte _month, _day,_hour,_minute,_second,_hundredths;

gps.f_get_position(&flat, &flon, &age);

gps.crack_datetime(&_year,&_month,&_day,&_hour,&_minute,&_second,&_hundredths,&age);

flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flat, 6;

flon == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flon, 6;

dtostrf(flat, 11, 6, gps_lat);

dtostrf(flon, 10, 6, gps_lon);

strcpy(gps_sms,"lat:");

strcat(gps_sms,gps_lat);

strcat(gps_sms,"\n");

strcat(gps_sms,"lon:");

strcat(gps_sms,gps_lon);

strcat(gps_sms,"\n");

strcat(gps_sms,"time:");

itoa(_year,gps_year,10);

strcat(gps_sms,gps_year);

itoa(_month,gps_mon,10);

if(strlen(gps_mon)==1)

strcat(gps_sms,"0");

strcat(gps_sms,gps_mon);

itoa(_day,gps_day,10);

if(strlen(gps_day)==1)

strcat(gps_sms,"0");

strcat(gps_sms,gps_day);

itoa(_hour,gps_hour,10);

if(strlen(gps_hour)==1)

strcat(gps_sms,"0");

strcat(gps_sms,gps_hour);

itoa(_minute,gps_min,10);

if(strlen(gps_min)==1)

strcat(gps_sms,"0");

strcat(gps_sms,gps_min);

itoa(_second,gps_sec,10);

if(strlen(gps_sec)==1)

strcat(gps_sms,"0");

strcat(gps_sms,gps_sec);

Serial.println(gps_sms);

}

}

char DeleteAllSMS()

{

char ret_val = -1;

if (CLS_FREE != gsm.GetCommLineStatus()) return (ret_val);

gsm.SetCommLineStatus(CLS_ATCMD);

ret_val = 0; // still not present

gsm.SimpleWriteln(F("AT+CMGDA=\"DEL ALL\""));

switch (gsm.WaitResp(8000, 50, "OK")) {

case RX_TMOUT_ERR:

// response was not received in specific time

ret_val = -2;

break;

case RX_FINISHED_STR_RECV:

// OK was received => SMS deleted

ret_val = 1;

break;

case RX_FINISHED_STR_NOT_RECV:

// other response: e.g. ERROR => SMS was not deleted

ret_val = 0;

break;

}

gsm.SetCommLineStatus(CLS_FREE);

return (ret_val);

}

通过9v电池供电或者是充电宝usb供电，把做好的三层不明物体放在开阔的地方，想arduino的手机号码发送“gps”短信，之后会收到一个回信，内容为

lat:23.036960

lon:114.418800

time:20170919114516

lat表示纬度，lon表示经度，time表示时间，不过是“格林尼治时间”（本初子午线）不是北京时间，和北京时间相差8小时。不会算的回去学地理。

如果你收到“gps not ready”回信，那就是说明没有搜到gps卫星，等一下或者是换个地方。