Can someone please help me with this frustrating problem?
I am trying to submit some data to a web server, from an Arduino, using a 3G shield. The problem comes in when trying to submit the IMEI number. sprintf() change it to another value and I simply cannot figure it out.
Here's the sample output from the serial monitor:
GSM serial: 013227000048516
GSM > AT+CREG?
GSM < +CREG: 0,1
GSM < OK
GSM net registred
IMEI : 013227000048516
AT+HTTPPARA="URL","http://www.xxxx.co.za\log.php?imei=1078
Here's the code I'm using right now:
#include <SD.h>
#define PIN_GSM_PWR 46 //PIN GSM POWER
#define GSMBUFFER_LENGTH 32
char GSMbuffer[GSMBUFFER_LENGTH];
char Serial2number[30];
char IMEI_no[30];
int gsmon =0;
int noerror;
int regok=0;
int retry;
const int CS_Pin = 4; // GBoard Pro use Pin 4 for CS
char IMEI_File[ ]="datalog3.txt"; // File to write to
File IMEI_Data;
//char IMEI_no[] = "";
void setup ()
{
pinMode (PIN_GSM_PWR, OUTPUT);
digitalWrite(PIN_GSM_PWR, LOW);
Serial2.begin(4800);
Serial.begin(115200); //monitor
Serial.println("GSM Test 03");
Save_IMEI();
} // END setup()
void SendQuery (char * str) {
while (Serial2.available()) Serial2.read(); //clear GSM buffer
Serial2.println(str);
//output monitor
Serial.print ("GSM > ");
Serial.println (str);
} // END void SendQuery (char * str)
int ReadAnswer (unsigned long timeout) {
int i=0;
unsigned long starttime = millis();
char c;
while (millis() - starttime < timeout) {
if (Serial2.available()) {
c=Serial2.read();
if (c == '\r') continue;
if (c == '\n') {
if (i ==0) continue; //free line
GSMbuffer[i]=0;
//output monitor
Serial.print ("GSM < ");
Serial.println (GSMbuffer);
return 1;
}
else if (i<GSMBUFFER_LENGTH) GSMbuffer[i++]=c;
}
}
return 0;
} // END int ReadAnswer (unsigned long timeout)
void GSMHandler() {
//Enable GSM module
Serial.println ("Go GSM handler...");
SendQuery ("ATE0"); //echo off
noerror=ReadAnswer (1000);
if (!noerror) { //time out
Serial.println ("GSM OFF");
Serial.println ("GSM POWER ON...");
digitalWrite(PIN_GSM_PWR, HIGH);
delay(1000);
digitalWrite(PIN_GSM_PWR, LOW);
delay(1000);
SendQuery ("ATE0");
noerror=ReadAnswer (1000);
}
retry=10;
while (retry>0) {
if (noerror) {
if (strcmp (GSMbuffer,"OK")==0) {
Serial.println ("GSM ON");
gsmon=1;
break;
}
}
delay(100);
SendQuery ("ATE0");
noerror=ReadAnswer (1000);
retry--;
}
if (!gsmon) {
Serial.println ("GSM disconnect, error");
return;
}
//Disable error mode
SendQuery ("AT+CMEE=0");
noerror=ReadAnswer (1000);
if (noerror) {
if (strcmp (GSMbuffer,"OK")!=0) { //query is not OK
noerror=0;
}
}
if (!noerror) {
Serial.println ("GSM error");
return;
}
//Serial number
SendQuery ("AT+GSN");
noerror=ReadAnswer (1000);
if (noerror) {
strcpy (Serial2number, GSMbuffer);
}
noerror=ReadAnswer (1000);
if (noerror) {
if (strcmp (GSMbuffer,"OK")!=0) { //queri is not OK
noerror=0;
}
}
if (!noerror) {
Serial.println ("GSM error");
return;
}
Serial.print ("GSM serial: ");
Serial.println (Serial2number);
//GSM wait net registration
retry=30; //wait 30 sec
while (retry>0) {
SendQuery ("AT+CREG?");
noerror=ReadAnswer (1000);
if (noerror) {
if (strcmp (GSMbuffer,"+CREG: 0,1")==0) {
regok=1;
}
}
noerror=ReadAnswer (1000);
if (strcmp (GSMbuffer,"OK")==0) { //query is OK
if (regok) break;
}
delay(1000);
retry--;
}
if (!regok) {
Serial.println ("GSM net not registration, error");
return;
}
Serial.println ("GSM net registred");
char log_data[100];
Serial.print("IMEI : ");
Serial.println(Serial2number);
sprintf(log_data, "AT+HTTPPARA=\"URL\",\"http://www.xxxx.co.za\\log.php?imei=%d", Serial2number);
Serial2.println("AT+HTTPINIT");
Serial2.println(log_data);
Serial2.println("AT+HTTPACTION=1");
Serial2.println("AT+HTTPREAD");
Serial.println(log_data);
} // END void GSMHandler()
void loop()
{
char c;
if (Serial.available()) {
c=Serial.read();
switch (c) {
case 'h':
GSMHandler();
break;
};
}
} // END loop()
void Save_IMEI()
{
// Serial.println("Initialize SD Card.");
pinMode(CS_Pin, OUTPUT);
if (!SD.begin(CS_Pin)) // Test if SD Card initialize
{
Serial.println("SD Card missing, or corrupt.");
return;
} // END if (!SD.begin(CS_Pin))
// Serial.println("SD Card initialized.");
IMEI_Data = SD.open(IMEI_File);
if (IMEI_Data.available()) // Test if IMEI_File is available
{
Serial.print(IMEI_File);
Serial.println(" available. Content below: ");
Serial.println();
while (IMEI_Data.available())
{
Serial.write(IMEI_Data.read()); // Read contents of file
// char IMEI_no = IMEI_Data.read();
} // END while (IMEI_Date.available())
IMEI_Data.close(); // Close file
}
else
{
Serial.print(IMEI_File);
Serial.println(" not available. Creating and adding content...");
IMEI_Data = SD.open(IMEI_File, FILE_WRITE); // Open file for writing
if (IMEI_Data)
{
SendQuery ("ATE0"); //echo off
noerror=ReadAnswer (1000);
if (!noerror) { //time out
digitalWrite(PIN_GSM_PWR, HIGH);
delay(400);
SendQuery ("ATE0");
noerror=ReadAnswer (1000);
}
retry=10;
while (retry>0) {
if (noerror) {
if (strcmp (GSMbuffer,"OK")==0) {
// Serial.println ("GSM ON");
gsmon=1;
break;
}
}
delay(100);
SendQuery ("ATE0");
noerror=ReadAnswer (1000);
retry--;
}
if (!gsmon) {
Serial.println ("GSM disconnect, error");
return;
}
SendQuery ("AT+CMEE=0"); //Disable error mode
noerror=ReadAnswer (1000);
if (noerror) {
if (strcmp (GSMbuffer,"OK")!=0) { //query is not OK
noerror=0;
}
}
if (!noerror) {
Serial.println ("GSM error");
return;
}
SendQuery ("AT+GSN"); // Get Serial number
noerror=ReadAnswer (1000);
if (noerror) {
strcpy (Serial2number, GSMbuffer);
Serial.print("IMEI No: ");
Serial.println(GSMbuffer);
}
noerror=ReadAnswer (1000);
if (noerror) {
if (strcmp (GSMbuffer,"OK")!=0) { // query is not OK
noerror=0;
}
}
if (!noerror) {
Serial.println ("GSM error");
return;
}
// Serial.print ("GSM serial: ");
// Serial.println (Serial2number);
Serial.print("Writing data to ");
Serial.print(IMEI_Data);
Serial.println(" ...");
IMEI_Data.println(Serial2number); // Writing data to file
IMEI_Data.close(); // Close file when done.
Serial.println("Done.");
strcpy (IMEI_no, Serial2number);
// IMEI_no = Serial2number;
} // END if (IMEI_File)
} // END if (SD.available(IMEI_File))
} // END void Save_IMEI()
