我正在尝试为汽车进行实时跟踪。我用过GPS Shield和GPRS Shield。它可以获得GPS纬度和长度，它可以将数据存储到我的数据库中。但问题是，当它获得gps坐标时，我的GPS Shield会在GPRS Shield完成时将数据存储在我的数据库中自动关闭。
我使用DFRobotcan的GPS / GSM / GPRS Shield和SeedStudio的GPRS Shield。我无法使用DFRobot的GPRS，因为我无法获得信号。这对我来说不是问题。
问题是为什么我的GPS防护罩在GPRS Shield完成存储数据时会降低？有人帮助我 这是我的业余代码。
#include <SoftwareSerial.h>
#include <String.h>
double lati, longati, latitudefix, longatitudefix;
String latu, longatu, latdir, londir, latitudebener, longatitudebener;
SoftwareSerial mySerial(7, 8);
String id="1310220001";
void setup()
{
mySerial.begin(19200); // the GPRS baud rate
pinMode(3,OUTPUT);//The default digital driver pins for the GSM and GPS mode
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
digitalWrite(5,HIGH);
delay(1500);
digitalWrite(5,LOW);
digitalWrite(3,LOW);//Enable GSM mode
digitalWrite(4,HIGH);//Disable GPS mode
delay(2000);
Serial.begin(9600);
delay(5000);//GPS ready
Serial.println("AT");
delay(2000);
//turn on GPS power supply
Serial.println("AT+CGPSPWR=1");
delay(1000);
//reset GPS in autonomy mode
Serial.println("AT+CGPSRST=1");
delay(1000);
digitalWrite(4,LOW);//Enable GPS mode
digitalWrite(3,HIGH);//Disable GSM mode
delay(2000);
Serial.println("$GPGGA statement information: ");
}
void loop()
{
while(1)
{
Serial.print("UTC:");
UTC();
Serial.print("Lat:");
latitude();
Serial.print("Dir:");
lat_dir();
Serial.print("Lon:");
longitude();
Serial.print("Dir:");
lon_dir();
Serial.print("Alt:");
altitude();
convert();
//Serial.println(latitudebener);
//Serial.println(longatitudebener);
Serial.println(' ');
Serial.println(' ');
if(latitudebener!="0.00000"&&longatitudebener!="0.00000"){
sendlocation();
}
else{
};
}
}
void convert(){
char bufferlat[20];
latitudebener=dtostrf(latitudefix,5,5,bufferlat);
char bufferlon[20];
longatitudebener=dtostrf(longatitudefix,5,5,bufferlon);
}
void sendlocation(){
mySerial.println("AT+CSQ");
delay(100);
mySerial.println("AT+CGATT?");
delay(100);
mySerial.println("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"");//setting the SAPBR, the connection type is using gprs
delay(1000);
mySerial.println("AT+SAPBR=3,1,\"APN\",\"AXIS\"");//setting the APN, the second need you fill in your local apn server
delay(4000);
mySerial.println("AT+SAPBR=1,1");//setting the SAPBR, for detail you can refer to the AT command mamual
delay(2000);;
mySerial.println("AT+HTTPINIT"); //init the HTTP request
delay(2000);
mySerial.println("AT+HTTPPARA=\"URL\",\"www.hamasa.cu.cc/editlocation.php?id="+id+"&latitude="+latitudebener+"&longatitude="+longatitudebener+"&latdir="+latdir+"&londir="+londir+"\"");
delay(2000);
mySerial.println("AT+HTTPACTION=0");//submit the request
Serial.println("8");
delay(5000);//the delay is very important, the delay time is base on the return from the website, if the return datas are very large, the time required longer.
mySerial.println("AT+HTTPREAD");// read the data from the website you access
delay(300);
mySerial.println("");
delay(100);
}
//void sms()
//{
// mySerial.println("AT+CMGF=1\r"); //Because we want to send the SMS in text mode
// delay(100);
// ShowSerialData();
// mySerial.println("AT + CMGS = \"+6283815535385\"");//send sms message,
// //be careful need to add a country code before the cellphone number
//
// delay(100);
// ShowSerialData();
// mySerial.println("bisa bil, latitudenya:"+latitudebener+""+latdir+", terus longatitudenya:"+longatitudebener+""+londir);//the content of the message
// delay(100);
// ShowSerialData();
// mySerial.println((char)26);//the ASCII code of the ctrl+z is 26
// delay(100);
// ShowSerialData();
// mySerial.println();
// ShowSerialData();
//}
void ShowSerialData()
{
while(mySerial.available()!=0)
Serial.write(mySerial.read());
}
double Datatransfer(char *data_buf,char num)//convert the data to the float type
{ //*data_buf：the data array
double temp=0.0; //the number of the right of a decimal point
unsigned char i,j;
if(data_buf[0]=='-')
{
i=1;
//process the data array
while(data_buf[i]!='.')
temp=temp*10+(data_buf[i++]-0x30);
for(j=0;j<num;j++)
temp=temp*10+(data_buf[++i]-0x30);
//convert the int type to the float type
for(j=0;j<num;j++)
temp=temp/10;
//convert to the negative numbe
temp=0-temp;
}
else//for the positive number
{
i=0;
while(data_buf[i]!='.')
temp=temp*10+(data_buf[i++]-0x30);
for(j=0;j<num;j++)
temp=temp*10+(data_buf[++i]-0x30);
for(j=0;j<num;j++)
temp=temp/10 ;
}
return temp;
}
char ID()//Match the ID commands
{
char i=0;
char value[6]={
'$','G','P','G','G','A' };//match the gps protocol
char val[6]={
'0','0','0','0','0','0' };
while(1)
{
if(Serial.available())
{
val[i] = Serial.read();//get the data from the serial interface
if(val[i]==value[i]) //Match the protocol
{
i++;
if(i==6)
{
i=0;
return 1;//break out after get the command
}
}
else
i=0;
}
}
}
void comma(char num)//get ','
{
char val;
char count=0;//count the number of ','
while(1)
{
if(Serial.available())
{
val = Serial.read();
if(val==',')
count++;
}
if(count==num)//if the command is right, run return
return;
}
}
void UTC()//get the UTC data -- the time
{
char i;
char time[9]={
'0','0','0','0','0','0','0','0','0'
};
double t=0.0;
if( ID())//check ID
{
comma(1);//remove 1 ','
//get the datas after headers
while(1)
{
if(Serial.available())
{
time[i] = Serial.read();
i++;
}
if(i==9)
{
i=0;
t=Datatransfer(time,2);//convert data
t=t+70000.00;//convert to the chinese time GMT+8 Time zone
Serial.println(t);//Print data
return;
}
}
}
}
void latitude()//get latitude
{
char i;
char lat[10]={
'0','0','0','0','0','0','0','0','0','0'};
if( ID())
{
comma(2);
while(1)
{
if(Serial.available())
{
lat[i] = Serial.read();
i++;
}
if(i==10)
{
i=0;
char buzz[20];
lati=Datatransfer(lat,5);
latu=dtostrf(lati,5,5,buzz);
String latijam=latu.substring(0,1);
String latimin=latu.substring(1,3);
String latidet=latu.substring(4,9);
double latijamd = latijam.toInt();
double latimind = latimin.toInt();
double latidetd = latidet.toInt();
double latmin = latimind+(latidetd*0.00001);
latitudefix= latijamd+(latmin/60);
Serial.println(latitudefix,5);
return;
}
}
}
}
void lat_dir()//get dimensions
{
char i=0,val;
if( ID())
{
comma(3);
while(1)
{
if(Serial.available())
{
val = Serial.read();
latdir=String(val);
Serial.print(latdir);
Serial.println();
i++;
}
if(i==1)
{
i=0;
return;
}
}
}
}
void longitude()//get longitude
{
char i;
char lon[11]={
'0','0','0','0','0','0','0','0','0','0','0' };
if( ID())
{
comma(4);
while(1)
{
if(Serial.available())
{
lon[i] = Serial.read();
i++;
}
if(i==11)
{
i=0;
//Serial.println(Datatransfer(lon,5),5);
char buffer[20];
longati=Datatransfer(lon,5);
longatu=dtostrf(longati,5,5,buffer);
String longatijam=longatu.substring(0,3);
String longatimin=longatu.substring(3,5);
String longatidet=longatu.substring(6,11);
double longatijamd = longatijam.toInt();
double longatimind = longatimin.toInt();
double longatidetd = longatidet.toInt();
double longmin = longatimind+(longatidetd*0.00001);
longatitudefix= longatijamd+(longmin/60);
Serial.println(longatitudefix,5);
return;
}
}
}
}
void lon_dir()//get direction data
{
char i=0,val;
if( ID())
{
comma(5);
while(1)
{
if(Serial.available())
{
val = Serial.read();
londir=String(val);
Serial.print(londir);
Serial.println();
i++;
}
if(i==1)
{
i=0;
return;
}
}
}
}
void altitude()//get altitude data
{
char i,flag=0;
char alt[8]={
'0','0','0','0','0','0','0','0'
};
if( ID())
{
comma(9);
while(1)
{
if(Serial.available())
{
alt[i] = Serial.read();
if(alt[i]==',')
flag=1;
else
i++;
}
if(flag)
{
i=0;
Serial.println(Datatransfer(alt,1),1);//print altitude data
return;
}
}
}
}
答案 0 :(得分：0)
尝试使用外部电源。这有用吗？
答案 1 :(得分：0)
实际上它应该是：
digitalWrite(3,LOW);//Enable GSM mode
digitalWrite(4,HIGH);//Disable GPS mode
答案 2 :(得分：-1)
问题可能是软件串口冲突，因为GPS和GSM屏蔽都使用串口。在你的情况下，你有耦合盾牌。在收到GPS信号时，GSM会被关闭，当获取信号时，GPS会关闭，GSM开始工作。