Using DFRobot sim808 and tried another code where sim cards not need and checked the similiar problems on different forum. still won't work

Software Arduino SIM
1

i use DFRobot sim808 and tried everything, also another code, that should work without simcard, but i still get error and not able to attach GPS for some reason? i have pushed the button to turn on the GPS. can some please help me out? i would really appreciate it.

20220609_121210
20220609_1212101920×933 220 KB

it keep going in the Void stup:

while(!sim808.init())
{
Serial.print("Welcome, I initiats the program\r\n");
delay(1000);

gps_test.ino (4.2 KB)

sim808
sim8081600×897 43.2 KB 

#include <DFRobot_SIM808.h>
#include <SoftwareSerial.h>
#define MESSAGE_LENGTH 160
char message[MESSAGE_LENGTH];
int messageIndex = 0;
char MESSAGE[300];
char lat[12];
char lon[12];
char wspeed[12];

char phone[16];
char datetime[24];

#define PIN_TX    10
#define PIN_RX    11
SoftwareSerial mySerial(PIN_TX,PIN_RX);
DFRobot_SIM808 sim808(&mySerial);//Connect RX,TX,PWR,

void enable_GPS()
{
  mySerial.println("AT+CGPSWR=1");
  Serial.println("AT+CGPSWR=1");
  
  delay(500);
  
  mySerial.println("AT+CGNSSEQ=\"RMC\"");
  Serial.println("AT+CGNSSEQ=\"RMC\"");
  
  mySerial.println("AT+CMGF=1");
  Serial.println("AT+CMGF=1");
  
  mySerial.println("AT+CGATT=?");
  Serial.println("AT+CGATT=?");
  
  mySerial.println("AT+CGNSINF");
  Serial.println("AT+CGNSINF");
  
  mySerial.println("AT+CMGS= +4552648069");
  Serial.println("AT+CMGS= +4552648069");
  
  delay(500);
}

String get_GPS()
{
 String str="";
 mySerial.println("AT+CGNSINF");
 delay(500);
 if (mySerial.available())
 {
  str = mySerial.readStringUntil("OK"); 
 }
 return str;
}
void setup()
{
  mySerial.begin(9600);
  Serial.begin(9600);
  enable_GPS();
  delay(100);

  //******** Initialize sim808 module *************
  while(!sim808.init())
  {
      Serial.print("Welcome, I initiats the program\r\n");
      delay(1000);
  }
  delay(3000);

  if( !sim808.attachGPS())
      Serial.println("Open the GPS power success");
  else 
      Serial.println("Open the GPS power failure");
      
  Serial.println("Init Success, please send SMS message to me!");
}

void loop()
{
  //*********** Detecting unread SMS ************************
   messageIndex = sim808.isSMSunread();

   //*********** At least, there is one UNREAD SMS ***********
   if (messageIndex > 0)
   { 
      Serial.print("messageIndex: ");
      Serial.println(messageIndex);
      
      sim808.readSMS(messageIndex, message, MESSAGE_LENGTH, phone, datetime);
                 
      //***********In order not to full SIM Memory, is better to delete it**********
      sim808.deleteSMS(messageIndex);
      Serial.print("From number: ");
      Serial.println(phone);  
      Serial.print("Datetime: ");
      Serial.println(datetime);        
      Serial.print("Recieved Message: ");
      Serial.println(message); 

    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);
      Serial.print("heading :");
      Serial.println(sim808.GPSdata.heading);
      Serial.println();
  
      float la = sim808.GPSdata.lat;
      float lo = sim808.GPSdata.lon;
      float ws = sim808.GPSdata.speed_kph;
  
      dtostrf(la, 6, 2, lat); //put float value of la into char array of lat. 6 = number of digits before decimal sign. 2 = number of digits after the decimal sign.
      dtostrf(lo, 6, 2, lon); //put float value of lo into char array of lon
      dtostrf(ws, 6, 2, wspeed);  //put float value of ws into char array of wspeed
    
      sprintf(MESSAGE, "Latitude : %s\nLongitude : %s\nWind Speed : %s kph\nMy Module Is Working. Mewan Indula Pathirage. Try With This Link.\nhttp://www.latlong.net/Show-Latitude-Longitude.html\nhttp://maps.google.com/maps?q=%s,%s\n", lat, lon, wspeed, lat, lon);
      
       Serial.println("Sim808 init success");
       Serial.println("Start to send message ...");
       Serial.println(MESSAGE);
       Serial.println(phone);
       sim808.sendSMS(phone,MESSAGE);
      //************* Turn off the GPS power ************
      sim808.detachGPS();
      
   }
}
2

Hello, I have the same problem, were you able to solve it?
can you help me?

3

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