用个8位单片机+sim900a+gps模块自制建议定位装置

2023-5-6 08:32| 发布者: 开心| 查看: 68| 评论: 0

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摘要: 　　gps定位器是一个被广泛运用的小工具，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 ...

　　gps定位器是一个被广泛运用的小工具，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。

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用个8位单片机+sim900a+gps模块自制建议定位装置

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