How to save serial print to an FTP server?

Programming Questions

steven.ol..

How to save serial print to an FTP server?

in Programming Questions • 1 year ago

I getting a information sent to me from my Arduino with a bluetooth shield; using this simple code:

import processing.serial.*;
Serial myPort; // The serial port
void setup(){
String BlueT = Serial.list()[4];
myPort = new Serial(this, BlueT , 115200);
}
void draw(){
println(myPort.read());
}

My intentions are to put it to a web sever (sftp) and be able load it through a web app. Does anyone know how I can do such a thing? Thanks!

Replies(2)

maleo

Re: How to save serial print to an FTP server?

1 year ago

here is an older discussion about FTP with processing:

http://processing.org/discourse/beta/num_1131152633.html

I have another suggestion though: send the data via HTTP GET. you just need a web server with PHP that accepts and stores the data.

here is some example code I used in a workshop to get you started. It periodically reads the value of a photoresistor connected to an arduino and sends it to the web server. the data is then used to set a corresponding light/dark background on a website.

Processing:

/**
* arduino workshop example 30.6.2011
*
* get sensor data from photoresistor
* convert to a grey value
* upload via http GET to a php driven website which uses the value
*/
import processing.net.*;
import processing.serial.*;
import cc.arduino.*;
Arduino a;
//constants
int inpin = 0; // analog input pin (photoresistor)
//variables
float web_interval = 10; //sec
float time = 0; // sec
float offset = 0; // millis
String server = "martinleopold.com"
String path = "data/index.php"
void setup() {
size(500,500);
a = new Arduino(this, Arduino.list()[0]);
size(500,500);
}
/*
photo resistor
0 is light
1024 is dark
*/
void draw() {
// read sensor value (0..1023)
int value = a.analogRead(inpin);
//println(value);
int grey = int(map(value, 0, 1023, 255, 0));
background(grey);
text(grey, width/2, height/2);
time = (millis() - offset) / 1000f;
if (time > web_interval) {
// send to web // send HTTP GET request:
println(millis()/1000f + ": sending to web: " + grey );
Client client = new Client(this, server, 80);
client.write("GET " + path + "?data=" + grey + " HTTP/1.0\r\n");
client.write("HOST: nameit.at\r\n\r\n");
offset = millis();
}
}

PHP:

<?php
/*
this takes a value 0..255 via GET
e.g.: index.php?data=243
the value is saved in data.txt
and output as background color
*/
$filename = "data.txt";
$data = $_GET["data"];
if ( $data ) {
// save data value to file
$file = fopen($filename, 'w');
fwrite($file, $data);
fclose($file);
// done
//die(); // also show the data
}
// read data
if ( file_exists($filename) && $data = file($filename) ) {
$data = $data[0];
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Arduino Data</title>
<style type="text/css">
body {
background-color:rgb(<?php echo $data . "," . $data . "," . $data; ?>);
}
</style>
</head>
<body>
<h1><?php echo $data; ?></h1>
</body>
</html>

steven.ol..

Re: Re: How to save serial print to an FTP server?

1 year ago

Sorry, I am trying to go through your code and I find it slightly confusing. Right now I have my arduino working wirelessly, and its sending the data via bluetooth. So the code that I posted is taking the serial print of the arduino and using the serial print of processing to show it. So what I need to do is save it to my web server (sftp).

Can you send me your code with comments on it? if so I can post my email.

Thanks for your help!

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