Hi, I am trying to transfer a text file from SD card to a FTP server using SIM900 via GPRS. I have used the code here as my reference http://www.cooking-hacks.com/index.php/documentation/tutorials/arduino-3g-gprs-gsm-gps#step13.
Though the title says, "Uploading a file from local storage or SD to FTP server" the code is only explaining how to transfer a file from local storage to FTP server and nothing is said about the SD card. I added the SD card initialization code and opened the text file in read mode. After this I don't know How I am supposed to proceed. here is my code,
#include <SD.h>
const int chipSelect = 4;
int8_t answer;
int onModulePin= 2;
char aux_str[50];
char file_name[ ]="datalog.txt";
void setup(){
delay(5000);
// SD function
Serial.begin(9600);
pinMode(chipSelect, OUTPUT);
pinMode(10, OUTPUT); // SD library to work
digitalWrite(10,HIGH);
Serial.print("Initializing SD card...");
if (!SD.begin(chipSelect))
{
Serial.println("Card failed, or not present");
return;
}
Serial.println("card initialized.");
File dataFile = SD.open("datalog.txt", FILE_READ);
if (dataFile)
Serial.println(" datalog.txt is opened in read mode.");
// GSM function
pinMode(onModulePin, OUTPUT);
Serial1.begin(9600);
delay(3000);
sendATcommand("AT", "OK", 5000);
Serial.println("GSM modem working!");
delay(3000);
// waits for signal
while( (sendATcommand("AT+CREG?", "+CREG: 0,1", 500) ||
sendATcommand("AT+CREG?", "+CREG: 0,5", 500)) == 0 );
// sets APN, user name and password
sendATcommand("AT+CGSOCKCONT=1,\"IP\",\"airtelgprs.com\"", "OK", 2000);
// ther is no username and password for my GPRS connection so I commented out this line
//sendATcommand("AT+CSOCKAUTH=1,1,\"\",\"\"", "OK", 2000);
// sets the paremeters for the FTP server
sendATcommand("AT+CFTPSERV=\"mydomain.in\"", "OK", 2000);
sendATcommand("AT+CFTPPORT=21", "OK", 2000);
sendATcommand("AT+CFTPMODE=1", "OK", 2000);
sendATcommand("AT+CFTPUN=\"username\"", "OK", 2000);
sendATcommand("AT+CFTPPW=\"password\"", "OK", 2000);
// the file must be in the current directory
sprintf(aux_str, "AT+CFTPPUTFILE=\"%s\",0", file_name);
answer = sendATcommand(aux_str, "+CFTPPUTFILE: 0", 60000);
if (answer == 1)
{
Serial.println("Upload done");
}
else
{
Serial.println("Upload fail");
}
}
void loop(){
}
void power_on(){
uint8_t answer=0;
// checks if the module is started
answer = sendATcommand("AT", "OK", 2000);
if (answer == 0)
{
// power on pulse
digitalWrite(onModulePin,HIGH);
delay(3000);
digitalWrite(onModulePin,LOW);
// waits for an answer from the module
while(answer == 0){
// Send AT every two seconds and wait for the answer
answer = sendATcommand("AT", "OK", 2000);
}
}
}
unsigned char sendATcommand(char* ATcommand, char* expected_answer1, unsigned int timeout)
{
unsigned char x=0, answer=0;
char response[100];
unsigned long previous;
memset(response, '\0', 100); // Initialize the string
delay(100);
while( Serial1.available() > 0) Serial1.read(); // Clean the input buffer
Serial1.println(ATcommand); // Send the AT command
x = 0;
previous = millis();
// this loop waits for the answer
do{
if(Serial1.available() != 0){
response[x] = Serial1.read();
x++;
// check if the desired answer is in the response of the module
if (strstr(response, expected_answer1) != NULL)
{
answer = 1;
}
}
// Waits for the asnwer with time out
}
while((answer == 0) && ((millis() - previous) < timeout));
return answer;
}
and this is the out put I am getting.
Initializing SD card...card initialized.
datalog.txt is opened in read mode.
GSM modem working!
Upload fail
Please help me I know I am doing some thing wrong.
Thanks in advance.
