SIM808 GPS With Library DFROBOT_SIM808 without rounded off latitude and longitud

Projects Programming
1

I just tried this code
#include <DFRobot_sim808.h>

#define PIN_TX 10
#define PIN_RX 11
SoftwareSerial mySerial(PIN_TX,PIN_RX);
DFRobot_SIM808 sim808(&mySerial);
void setup() {
mySerial.begin(9600);
Serial.begin(9600);

//******** Initialize sim808 module *************
while(!sim808.init()) {
delay(1000);
Serial.print("Sim808 init error\r\n");
}

//************* Turn on the GPS power************
if( sim808.attachGPS())
Serial.println("Sukses membuka daya GPS");
else
Serial.println("Gagal membuka daya GPS");

}

void loop() {
//************** Get GPS data *******************
while (sim808.getGPS()) {
Serial.print(sim808.GPSdata.year);
Serial.print("/");
Serial.print(sim808.GPSdata.month);
Serial.print("/");
Serial.print(sim808.GPSdata.day);
Serial.print(" ");
Serial.print(sim808.GPSdata.hour);
Serial.print(":");
Serial.print(sim808.GPSdata.minute);
Serial.print(":");
Serial.print(sim808.GPSdata.second);
Serial.print(":");
Serial.println(sim808.GPSdata.centisecond);
Serial.print("latitude :");
Serial.println(sim808.GPSdata.lat);
Serial.print("longitude :");
Serial.println(sim808.GPSdata.lon);
Serial.print("speed_kph :");
Serial.println(sim808.GPSdata.speed_kph);

//************* matikan daya GPS ************
sim808.detachGPS();
}

}

and the result is

i don't want that latitude and longitude is rounded off.

wich code i mustedit in the library?

bool DFRobot_SIM808::getGPS()
{
if(!getGPRMC()) //没有得到$GPRMC字符串开头的GPS信息
return false;
// Serial.println(receivedStack);
if(!parseGPRMC(receivedStack)) //不是$GPRMC字符串开头的GPS信息
return false;

// skip mode
char *tok = strtok(receivedStack, ","); //起始引导符
if (! tok) return false;

// grab time //<1> UTC时间，格式为hhmmss.sss；
// tok = strtok(NULL, ",");
char *time = strtok(NULL, ",");
if (! time) return false;
uint32_t newTime = (uint32_t)parseDecimal(time);
getTime(newTime);

// skip fix
tok = strtok(NULL, ","); //<2> 定位状态，A=有效定位，V=无效定位
if (! tok) return false;

// grab the latitude
char *latp = strtok(NULL, ","); //<3> 纬度ddmm.mmmm(度分)格式(前面的0也将被传输)
if (! latp) return false;

// grab latitude direction // <4> 纬度半球N(北半球)或S(南半球)
char *latdir = strtok(NULL, ",");
if (! latdir) return false;

// grab longitude //<5> 经度dddmm.mmmm(度分)格式(前面的0也将被传输)
char *longp = strtok(NULL, ",");
if (! longp) return false;

// grab longitude direction //<6> 经度半球E(东经)或W(西经)
char *longdir = strtok(NULL, ",");
if (! longdir) return false;

double latitude = atof(latp);
double longitude = atof(longp);

// convert latitude from minutes to decimal
double degrees = floor(latitude / 100);
double minutes = latitude - (100 * degrees);
minutes /= 60;
degrees += minutes;

// turn direction into + or -
if (latdir[0] == 'S') degrees *= -1;

//*lat = degrees;
GPSdata.lat = degrees;

// convert longitude from minutes to decimal
degrees = floor(longitude / 100);
minutes = longitude - (100 * degrees);
minutes /= 60;
degrees += minutes;

// turn direction into + or -
if (longdir[0] == 'W') degrees *= -1;

//*lon = degrees;
GPSdata.lon= degrees;

// only grab speed if needed //<7> 地面速率(000.0~999.9节，前面的0也将被传输)
// if (speed_kph != NULL) {

// grab the speed in knots
char *speedp = strtok(NULL, ",");
if (! speedp) return false;

// convert to kph
//*speed_kph = atof(speedp) * 1.852;
GPSdata.speed_kph= atof(speedp) * 1.852;

// }

// only grab heading if needed //地面航向(000.0~359.9度，以真北为参考基准，前面的0也将被传输)
// if (heading != NULL) {

// grab the speed in knots
char *coursep = strtok(NULL, ",");
if (! coursep) return false;

//*heading = atof(coursep);
GPSdata.heading = atof(coursep);
// }

// grab date
char *date = strtok(NULL, ","); //<3> 纬度ddmm.mmmm(度分)格式(前面的0也将被传输)
if (! date) return false;
uint32_t newDate = atol(date);
getDate(newDate);

// no need to continue
// if (altitude == NULL){
// return true;
//}
return true;
}

Thanks Before

2

The "rounding" happens because you are printing the float to two decimal places. If you want more than that, RTFM.