Can it send large .txt files of like 10 MB?

[bhupiister]

Can it send large .txt files of like 10 MB?
I will try this code on ESP32 board. Since its working on Arduino, it should work on esp32 too.
I want to store sensor data all day and at night want to push this sensor data on server via FTP of HTTP post. Which is the recommended method ?

[carrascoacd]

I'd say that FTP is better in SIM800L: easier. Try with small files instead, divide the 10mb file in small files and send them more often.

…

On Sun 23 Aug 2020, 6:54 p.m. bhupiister ***@***.***> wrote: Can it send large .txt files of like 10 MB? I will try this code on ESP32 board. Since its working on Arduino, it should work on esp32 too. I want to store sensor data all day and at night want to push this sensor data on server via FTP of HTTP post. Which is the recommended method ? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#46>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABBWFOBF2IRLIYVLCUOFEYDSCFCTBANCNFSM4QIYEMUQ> .

[bhupiister]

I wanted some library that could do this division part.
After putting this command
AT+FTPPUT=1
OK
+FTPPUT: 1,1,1360
Does this mean that maximum bytes that can be sent is 1360?
How can we divide a file then?

[bhupiister]

Came across this code today for large files, will test it. See if you can get something from it to improve your library.

#include <SD.h>

#define csSD 5

bool debug = 1;
bool roaming = false;
char* file_name = /"Filename"/;
File dataFile;
File dataFileCopy;
const int Sim900PowerPin = 46;
String apn_name = /"apn_name"/;
String apn_username = ""; //not tested
String apn_password = ""; //not tested
String ftp = /"ftp adress/";
String ftp_user = /"ftp username"/;
String ftp_password = /"ftp password/";

void setup() {
if (debug) {Serial.begin(19200);}
Serial3.begin(19200);
pinMode(csSD, OUTPUT);

//init SD Card
byte answer = 0;
int i = 0;
while (i < 5 && answer == 0) {
if (!SD.begin(csSD)) {
if (debug) {Serial.println("SD Card initialization failed!");}
i++;
delay(500);
}
else {
if (debug) {Serial.println("SD Card initialization done.");}
answer = 1;
}
}
if (answer == 0) {/Send SMS that init SD Card is failed/}
//done init SD card

//check if file arivle
else if(answer == 1) {answer = checkFile();}
if (answer == 0) {/Send SMS that file is not avriable/}

//GPRS part
else if(answer == 1) {answer = powerUp_Sim900();}
if (answer == 0) {/Send SMS that powerUP is failed/}
else if (answer == 1) {delay(20000); answer = initSim900();} //Delay to let startuo the SIM900 Module
if (debug) {Serial.println("--- Answer initSim900: " + String(answer));}
if (answer == 0) {/Send SMS that Sim900 init failed/}
else if (answer == 1) {answer = initSim900FTP();}
if (debug) {Serial.println("--- Answer initSim900FTP: " + String(answer));}
if (answer == 0) {/Send SMS that Sim900FTP init failed/}
else if (answer == 1) {answer = Sim900FTPSend();}
if (debug) {Serial.println("--- Answer Sim900FTPSend: " + String(answer));}
if (answer == 0) {/Send SMS that Sim900FTPSend failed/}
}

void loop() {

}

byte initSim900() {
byte answer = 0;
int i = 0;
while (i < 10 && answer == 0){
answer = sendATcommand("AT+CREG?","+CREG: 0,1", 1000);
i++;
delay(1000);
}
if (roaming and answer == 0) {
while (i < 20 && answer == 0){
answer = sendATcommand("AT+CREG?","+CREG: 0,5", 1000);
i++;
delay(1000);
}
}
if (answer == 1){answer = sendATcommand("AT+SAPBR=3,1,"Contype","GPRS"","OK", 1000);}
String com = "AT+SAPBR=3,1,"APN","" + apn_name + """;
if (answer == 1){answer = sendATcommand(string2char(com), "OK", 1000);}
/if (apn_username!= "") {
com = "AT+SAPBR=3,1,"USER","" + apn_username + """;
if (answer == 1){answer = sendATcommand(string2char(com), "OK", 1000);};
if (apn_password != "") {
com = "AT+SAPBR=3,1,"PWD","" + apn_password + """;
if (answer == 1){answer = sendATcommand(string2char(com), "OK", 1000);}
}
}/
if (answer == 1){
answer = 0;
i = 0;
while (i < 3 && answer == 0){
answer = sendATcommand("AT+SAPBR=1,1", "OK", 10000);
if (answer == 0){sendATcommand("AT+SAPBR=0,1", "OK", 10000);}
i++;
}
}
if (answer == 1){answer = sendATcommand("AT+SAPBR=2,1", "OK", 1000);}
return answer;
}

byte initSim900FTP() {
byte answer = 0;
answer = sendATcommand("AT+FTPCID=1", "OK", 1000);
String com = "AT+FTPSERV="" + ftp + """;
if (answer == 1){answer = sendATcommand(string2char(com), "OK", 1000);}
if (answer == 1){answer = sendATcommand("AT+FTPPORT=21", "OK", 1000);}
com = "AT+FTPUN="" + ftp_user + """;
if (answer == 1){answer = sendATcommand(string2char(com), "OK", 1000);}
com = "AT+FTPPW="" + ftp_password + """;
if (answer == 1){answer = sendATcommand(string2char(com), "OK", 1000);}
com = "AT+FTPPUTNAME="" + String(file_name) + """;
if (answer == 1){answer = sendATcommand(string2char(com), "OK", 1000);}
if (answer == 1){answer = sendATcommand("AT+FTPPUTPATH="/"", "OK", 1000);}
return answer;
}

byte Sim900FTPSend (){
byte answer = 0;
if (answer = sendATcommand("AT+FTPPUT=1", "+FTPPUT:1,1,", 60000) == 1) {
int data_size = 0;
while(Serial3.available()==0);
char aux = Serial3.read();
do{
data_size *= 10;
data_size += (aux-0x30);
while(Serial3.available()==0);
aux = Serial3.read();
} while(aux != 0x0D);
dataFile = SD.open(file_name);
String XcomA = "";
String XcomB = "";
XcomA.concat("AT+FTPPUT=2,");
XcomA.concat(data_size);
XcomA.concat(""");

XcomB.concat("+FTPPUT:2,");
XcomB.concat(data_size);
XcomB.concat("\"");
   
char XxcomA[XcomA.length()];
char XxcomB[XcomB.length()];
   
XcomA.toCharArray(XxcomA,XcomA.length());
XcomB.toCharArray(XxcomB,XcomB.length());
   
if (dataFile) {
  int archivosize = dataFile.size();
  while(dataFile.available() and answer == 1){
    while(archivosize >= data_size){
      if (answer = sendATcommand(XxcomA,XxcomB,3000) == 1) {
        for(int d = 0; d < data_size; d++){
          Serial3.write(dataFile.read());
          archivosize -= 1;
        }
      }
      else {answer = 0;}
    }
    String ScomA = "";
    String ScomB = "";
    ScomA.concat("AT+FTPPUT=2,");
    ScomA.concat(archivosize);
    ScomA.concat("\"");
           
    ScomB.concat("+FTPPUT:2,");
    ScomB.concat(archivosize);
    ScomB.concat("\"");
           
    char CcomA[ScomA.length()];
    char CcomB[ScomB.length()];
           
    ScomA.toCharArray(CcomA,ScomA.length());
    ScomB.toCharArray(CcomB,ScomB.length());
                   
    if (sendATcommand(CcomA,CcomB,3000) == 1) {
      for(int t = 0; t < archivosize; t++){
        Serial3.write(dataFile.read());
      }
    }
  }
  // close the file:
  dataFile.close();
}
delay(500);
if (sendATcommand("AT+FTPPUT=2,0", "+FTPPUT:1,0", 30000)==1){
  if (debug) {Serial.println("File " + String(file_name) + " uploaded..." );}
}         

}
else {answer = 0;}
return answer;
}

unsigned char sendATcommand(char* ATcommand, char* expected_answer1, unsigned int timeout) {
unsigned char x = 0;
unsigned char answer = 0;
char response[100];
unsigned long previous;
memset(response, '\0', 100);
delay(100);
while( Serial3.available() > 0) Serial3.read();
Serial3.println(ATcommand);
x = 0;
previous = millis();
do{
if(Serial3.available() != 0){
response[x] = Serial3.read();
x++;
if (strstr(response, expected_answer1) != NULL) {
answer = 1;
}
}
} while((answer == 0) && ((millis() - previous) < timeout));
if (debug) {Serial.println(response);}
return answer;
}

byte powerUp_Sim900() {
byte answer = 0;
int i = 0;
powerSim900();
while (i < 2 && answer == 0){
answer = sendATcommand("AT+CREG?","+CREG:", 1000);
i++;
delay(500);
}
if (answer == 0) {powerSim900();}
i = 0;
while (i < 2 && answer == 0){
answer = sendATcommand("AT+CREG?","+CREG:", 1000);
i++;
delay(500);
}
return answer; //send 1 if power up
}

byte powerDown_Sim900() {
byte answer = 0;
int i = 0;
powerSim900();
while (i < 2 && answer == 0){
answer = sendATcommand("AT+CREG?","+CREG:", 1000);
i++;
delay(500);
}
if (answer == 1) {powerSim900();}
i = 0;
while (i < 2 && answer == 1){
answer = sendATcommand("AT+CREG?","+CREG:", 1000);
i++;
delay(500);
}
return answer; //send 0 if power up
}

void powerSim900() {
pinMode(Sim900PowerPin, OUTPUT);
digitalWrite(Sim900PowerPin,LOW);
delay(1000);
digitalWrite(Sim900PowerPin,HIGH);
delay(2000);
digitalWrite(Sim900PowerPin,LOW);
delay(5000);
}

char* string2char(String command){
if(command.length() != 0){
char p = const_cast<char>(command.c_str());
return p;
}
}

byte checkFile() {
byte answer = 0;
if(SD.exists(file_name)) {answer = 1;}
return answer;
}

[carrascoacd]

It means that the max chunk size is 1360 bytes per request. Try writing small files (some Kb) more often and upload them. Do not try to divide the 10mb one.

…

On Sun 23 Aug 2020, 7:48 p.m. bhupiister ***@***.***> wrote: I wanted some library that could do this division part. After putting this command AT+FTPPUT=1 OK +FTPPUT: 1,1,1360 Does this mean that maximum bytes that can be sent is 1360? How can we divide a file then? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#46 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABBWFOHKRXYJUMFJ7XD4U33SCFI7LANCNFSM4QIYEMUQ> .

[basurilla82]

Hello, have you solve this problem?. I want to send a big picture file by ftp with sim800l and esp32 (not wifi). Please, can you write your final code source?. Thanks.