user55884: I want to try this example, A Simple Function for Reading CSV Text Files, in order to read a .csv file from an SD card, but I don't have the SD card reader module and can't find it in my country. 
What I have found everywhere is this sound module, WTV020-SD, and I wonder if I can use that to read a single .csv file from it, using the SD Arduino library. I checked the module's documentation and there's nothing about it in there. 

user6936: It seems unlikely, for if you compare the schematic of the WTV020-SD (card reader part only) from the data sheet that you provided:

to the schematic of a bog standard SD card reader:

they are not the same. Instead of interfacing directly to the Arduino, as the standard SD card reader does, the WTV020-SD has additional logic, in the form of a WTV020SD-20S IC.
Therefore the code on the Arduino forums is highly unlikely to work.

55884: <p>I want to try this example, <a href="https://forum.arduino.cc/index.php?topic=340849.0" rel="nofollow noreferrer">A Simple Function for Reading CSV Text Files</a>, in order to read a .csv file from an SD card, but I don't have the SD card reader module and can't find it in my country. </p>

<p>What I have found everywhere is this sound module, <a href="https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Widgets/WTV020SD.pdf" rel="nofollow noreferrer">WTV020-SD</a>, and I wonder if I can use that to read a single .csv file from it, using the SD Arduino library. I checked the module's documentation and there's nothing about it in there. </p>
 6936: <p>It seems unlikely, for if you compare the schematic of the WTV020-SD (card reader part only) from the data sheet that you provided:</p>

<p><a href="https://i.stack.imgur.com/1vRTv.png" rel="nofollow noreferrer" title="WTV020-SD (card reader part only) schematic"><img src="https://i.stack.imgur.com/1vRTv.png" alt="WTV020-SD (card reader part only) schematic" title="WTV020-SD (card reader part only) schematic"></a></p>

<p>to the schematic of a bog standard SD card reader:</p>

<p><a href="https://i.stack.imgur.com/lHG42.jpg" rel="nofollow noreferrer" title="Standard SD card reader schematic"><img src="https://i.stack.imgur.com/lHG42.jpg" alt="Standard SD card reader schematic" title="Standard SD card reader schematic"></a></p>

<p>they are not the same. Instead of interfacing directly to the Arduino, as the standard SD card reader does, the WTV020-SD has additional logic, in the form of a WTV020SD-20S IC.</p>

<p>Therefore the code on the Arduino forums is highly unlikely to work.</p>
