Is it possible to read a microSD card (on a breakout) through the USB port on the arduino?
From the PC, no. The SD card reader is not a separate piece of hardware that you can connect directly to.
You could program the Arduino to respond to serial commands that direct it to return data from/about the SD card. Then, you'd need to write an application on the PC that could send the relevant commands and react to the returned information.
Sounds easy, but not for a newbee 8)
Is is possible with a ethetnet shield?
I have an Seeeduino stalker and i want to copy the log file from the SD card to my pc once a while.
Does anyone know how i can do this easy?
Thats not what i want to hear, but i have to live whit this fact.
There is also a serial connection on the board. Does somebody know if its possible to dowlaod the lof file on the SD card by using de serial connection?
An SD card uses an SPI interface. You can talk to it with any device that can handle SPI, like the arduino. So the arduino can talk to your card and then use that data for something. Like in the Lady Ada sound shield or in various graphics LCD shields.
However, SPI is not a protocol that the PC talks, things like card readers convert the USB protocol to SPI and back to USB so the PC can make sense of it.
So the arduino can talk to your card and then use that data for something.
The Arduino can also talk to the serial port. You could develop an application on the PC that would tell the Arduino to spool data from the SD card back to the PC, via the serial port. The PC application would then need to store the data spooled back.
Pretty simple application for the PC and for the Arduino.
It wouldn't be possible to connect directly with the sd card trough a separate usb cable hooked onto the sd shield?
Not going trough Arduino, so the sd cards looks just like a normal card connected directly to the pc.
My problems is that I need to make a watertight enclosure and i need access to the sd card files.
I need something similar.
I want to log the data to the SD and then send it to a server (MySQL).
Most people have a server running at home or have web-space.
But what if your server is broken or down. So i want the stuff first on SD and then
upload it every 5 minutes.
I was playing around before a year but since that i had no time.
I have to windows bat files here i used but can't remember what i did exactly.
But if you have the Arduino running as server then it can be done.
Here is what i found in my old folder (bat files).
GNU Wget:
' Set your settings
strFileURL = "http://192.168.0.80/LOGGER00.CSV"
strSavePath = "F:\0\"
' Send an HTTP request for the file
Set objXMLHTTP = CreateObject("MSXML2.XMLHTTP")
objXMLHTTP.open "GET", strFileURL, false
objXMLHTTP.send()
' If the server responds with "OK"...
If objXMLHTTP.Status = 200 Then
' Create a stream object to write downloaded data to
Set objADOStream = CreateObject("ADODB.Stream")
objADOStream.Open
objADOStream.Type = 1 'adTypeBinary
objADOStream.Write objXMLHTTP.ResponseBody
objADOStream.Position = 0
' Create an empty file on disk
Set objFso = Createobject("Scripting.FileSystemObject")
' Make sure we don't have any name collision...
If objFso.Fileexists(strSavePath) Then objFSO.DeleteFile strSavePath
Set objFso = Nothing
' Write the stream data to file
objADOStream.SaveToFile strSavePath
objADOStream.Close
Set objADOStream = Nothing
End if
Set objXMLHTTP = Nothing
Sure not USB but you can copy the stuff to your PC.
I really do not see the problem here, but maybe that is just me.
The Arduino can read the SD card and send data to the serial port. A PC can receive data from the serial port.
Write a program (Visual basic even or pascal) that sends a 'send' command (ctrl-s or whatever you like) to the arduini whereupun the arduino responds with reading the sd card and sending the bytes to the serial port. Your PC program then must be awaiting that data and do something with it (write it to disk, as bytes or as data directly in a CSV or database file). When the Arduino is done, he sends a code that the PC understands as 'done'
I have done something similar long time ago with an 8052 and Clipper on a PC. The 8052 upon command dumped its data memory to the serial port and the PC stored that in a clipper file.
is it not possable to have the base code or sketch on sd or usb storage and activate it through the bootloader?
if you can ake arduino read from a text file there must be a way to hack the bootloader to read lines into the code even though the bootloader should be read only. after all you only need the comand lines in theory right. and does anyone know where i can find the bootloader code? thanks in advance.
is it not possable to have the base code or sketch on sd or usb storage and activate it through the bootloader?
if you can ake arduino read from a text file there must be a way to hack the bootloader to read lines into the code even though the bootloader should be read only. after all you only need the comand lines in theory right. and does anyone know where i can find the bootloader code? thanks in advance.
oh and does anyone know how to build your own sd shield? ive had a thought about mass storage id like to try