View source for KS0447 Keyestudio Micro TF Card Write-Read Module



[[image:Ks0447-1.png|thumb|400px|right|Keyestudio Micro TF Card Read-Write Module (Black and Eco-friendly)]]


<br> 
== Overview == 
The TF card is the most commonly used storage element for interactive media devices. Keyestudio micro TF card read-write module uses SPI communication to read or write data to the TF card. <br> 
When using, we just insert the TF card into the TFT card socket, connect the keyestudio MicroSD module to the MCU, and then read/write the TF card through programming.<br> 
The module comes with two 3mm fixing holes, easy to fix it to other devices.

<br> 
== Technical Details == 
* Input voltage: DC 5V
* Operating voltage: DC 3.3V
* Working current: about 10mA
* Maximum power: 0.1W
* Operating temperature range: -25℃ to 70℃
* Interface type: 7-pin header with a pitch of 2.54mm
* Positioning hole diameter: 3mm
* TF card socket: self-popping
* Dimensions: 34mm*28mm*6mm
* Weight: 4.1g
* Environmental attributes: ROHS
<br>[[File:Ks0447-2.png|300px|frameless|thumb]] <br> 


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== Hookup Guide ==  
Connect keyestudio MicroSD module to UNO R3 board as below diagram. Then insert your TF card into the TF card socket.
<br>[[File:Ks0447-3.png|600px|frameless|thumb]]<br>  


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== Test Code ==
<span style=color:red> Don’t forget to place the necessary library into Arduino library directory when uploading the test code. </span><br>

<pre>
#include <SPI.h>
#include <SD.h>
File myFile;

void setup()
{
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  Serial.print("Initializing SD card...");
  // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
  // Note that even if it's not used as the CS pin, the hardware SS pin
  // (10 on most Arduino boards, 53 on the Mega) must be left as an output
  // or the SD library functions will not work.
  pinMode(10, OUTPUT);
  if (!SD.begin(4)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");
  // open the file. note that only one file can be open at a time,
  // so you have to close this one before opening another.
  myFile = SD.open("test.txt", FILE_WRITE);
  // if the file opened okay, write to it:
  if (myFile) {
    Serial.print("Writing to test.txt...");
    myFile.println("Hello,keyestudio!");
    // close the file:
    myFile.close();
    Serial.println("done.");
  } else {
    // if the file didn't open, print an error:
    Serial.println("error opening test.txt");
  }
  // re-open the file for reading:
  myFile = SD.open("test.txt");
  if (myFile) {
    Serial.println("test.txt:");
    // read from the file until there's nothing else in it:
    while (myFile.available()) {
      Serial.write(myFile.read());
    }
    // close the file:
    myFile.close();
  } else {
    // if the file didn't open, print an error:
    Serial.println("error opening test.txt");
  }
}

void loop()
{
  // nothing happens after setup
}
</pre>


<br>
== Result == 
Done uploading the code, open the serial monitor and set the baud rate to 9600.  <br>
In the code, we already set up a '''TEST.txt''' file in the TF card, and write into "Hello,keyestudio!" <br>
The serial monitor window will read the content of TEST.txt file, and print out the content "Hello,keyestudio!"   
<br>[[File:Ks0447-4.png|700px|frameless|thumb]]<br>  


<br>
==Resource==
*'''Download all the relevant info. from the link:'''<br>
https://drive.google.com/open?id=1DVmWkOafCDn-xoBC_Jb64jkfIe1wQm_7


<br>
==Buy from ==
*[ '''Official Website''']

*[https://www.aliexpress.com/store/product/Keyestudio-Mini-Micro-SD-TF-Card-Memory-Shield-Module-With-Pins-for-Arduino/1452162_33048074346.html?spm=2114.12010611.8148356.2.26ac6c0eFq90W1   ''' Shop on Aliexpress ''']


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[[category:Module]]