Arduino SD Card Reader Tutorial: Initialization, Technical Insights, and Data Logging

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Welcome back after a longer break. In this video I will look at the SD card reader. This tutorial would cover, initialising this module, displaying technical information about the inserted SD card as well as cover data logging to text files located on the SD card.
Hope you will find this content useful
I will shortly create Hackter tutorial where you will find all the links to sketches mentioned in this video.

[@monahanz]

First decent video for SD cards. Wish the was a way to R/W individual sectors. (Want to make CPM3 SD cards)

[@ruchisingh4855]

really helpful videos. Your one of the video where you have made us understand the use of Arduino with 12 v source. really helped me a lot. thanks. Keep making this type of content. Very nice and detailed content.

[@4KOWO]

love your vids. can you maybe. amek a "ghost hnuting" machine with arduion uno

[@AariPlayz]

thank yuo

[@naeemhaq3504]

Good.

[@jumbo999614]

I use those sd2card, sdVolume,etc. to initialize and check sd card type and list the content. I get no error with this part. But how to open image file? I want to load image and display it on TFT screen. Below is my code: but I get "failed" all the time. File root = SD.open("/"); File entry = root.openNextFile(); uint8_t nameSize = String(entry.name()).length(); // get file name size String str1 = String(entry.name()).substring( nameSize - 4 ); // save file extension if( str1.equalsIgnoreCase(".bmp") ) // if the file has '.bmp' extension { Serial.println("OK"); bmpDraw(entry.name(), 0, 0); } else { Serial.println("failed"); } entry.close(); // close the file void bmpDraw(char *filename, uint8_t x, uint16_t y)

[@marios_ideas]

To begin with, the image must be in the correct format. The display requires the RGB565 format, where each pixel is represented by 16 bits: 5 bits for red, 6 bits for green, and 5 bits for blue. You can either prepare your image in this format, which can be challenging, or convert from a 24-bit color format inside your Arduino code, which is even more complex. The display bitmap method is designed for monochrome images. Check out my recent video: kzbin.info/www/bejne/aJSXi6yAjsaKiZo. In a few days, I'll release a new video on displaying color bitmaps on the display, but sending them from a PC over a serial interface instead of using an SD card module. The final draft of this video will be available today on Patreon and for my channel members. It will show you how to prepare the image and send the bytes to the display. One issue for me is that my display doesn't have a Chip Select (CS) pin, so I can't use it with an SD card reader. Additionally, the SD card reader works with 5V logic, while my microcontroller and display use 3.3V logic. When I get the new components (a display with CS and a 3.3V SD card module), I'll create another video on this topic. If this response helped you, please consider supporting my channel.

[@jumbo999614]

@@marios_ideas Thank you for your advice. I'll check the link.

[@g.u.y332]

which is this SD library ? In my sd library it just shows SD test and SD time

[@marios_ideas]

I have not installed this library. It comes with Arduino IDE installation so if you have less examples it is either because you have different Arduino IDE version with differebt version of the library or you installed some other library on top of it. Go to Arduino Manage Libraries and find the version and see if there are upgrades available

[@christianplay4041]

If you are using the newer version of the Arduino IDE (2.3.2): Go to library manager > search "SD" > click on the three dots on the corner of the SD library > Examples This are the examples shown in the video and it contains all of them, I had the same issue.