Questions tagged [sd-card]
SD cards are often used with the Arduino Ethernet Shield. They stand for "secure digital cards" and fit into one's palm. They range from 256MB to 128GB, although most Arduinos only use 4GB. There are also SD micro cards, a smaller version of the cards.
377 questions
-1 votes
1 answer
63 views
Musicbox freezes or can no longer find songs (FeatherRP2040, VS1053, Neokey1x4 x 2, RotaryEncoder)
I have a problem with my code for a music box that has the following features. Using two neokey1x4 I can switch between folders on the SD card and press play/pause, stop, next song, previous song. ...
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0 votes
1 answer
537 views
Set SPI Mode on Arduino Uno R4
I am switching a code from Arduino Uno R3 to Arduino Uno R4 Wifi due to the limitation of RAM spaces on R3. I use a thermocouple shield and SD Card read/write shield with the project, which requires ...
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0 votes
1 answer
327 views
Change MKR Zero SD SPI Pins
I have been trying to learn more about using the ATSAMD21 MCU with Arduino. I designed and assembled a bare bones breakout board and have successfully flashed the MKR Zero bootloader and uploaded ...
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0 votes
1 answer
128 views
WiFi credentials pulled from an SD card fail, but work hard-coded?
I'm trying to move my hard-coded wifi SSID/password credentials to an SD card so they can be more easily changed, but when passing the SSID to the WiFi.begin() function, I'm getting a status code 1 - &...
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1 vote
2 answers
214 views
Can't read SD card
I get errors to open file on SD card. This is the instructions I use https://www.instructables.com/Micro-SD-Card-Tutorial/ /* SD card read/write This example shows how to read and write data to ...
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0 votes
1 answer
88 views
Why can't I write to SD, while the ReadWrite example works?
I've created a sensor that measures the color of the external cerebrospinal fluid drain using TCS3200. I'm able to get readings, but I'm unable to save them on the SD card, yet I'm very much able to ...
0 votes
0 answers
252 views
How can I save an image from the ESP32-CAM to a separate SD card?
For a project, I need to take a picture with the ESP32-CAM, save it to an SD card, and then have the Arduino UNO access the image. I have the ESP32-CAM with OV2640 connected to the ESP32-CAM-MB, which ...
0 votes
0 answers
914 views
ESP-C3 Super mini MAX98357A and SD Card Reader together
After a lot of research and minimum results about pin mapping and particular specific configurations for SPI and I2S on ESP-C3, i about to give up on this. I have recently bought ESP32-C3 Supermini ...
0 votes
0 answers
140 views
How can I display an image on a Waveshare ILI9486?
I am using STM32 and 3.5 inch TFT display (Waveshare ILI9486) and I want to display an image and I have connected the SD card. How to do using the Arduino IDE? For now I am trying to fetch a word from ...
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0 votes
1 answer
506 views
More flash memory with SD card
I am pretty sure that everyone have seen the low flash memory error, the same I have got while making my raycaster. So, I was thinking that is there any way to increase the flash memory of ESP32 with ...
1 vote
1 answer
183 views
SdFat.h pin selection ESP8266
This super simple code, that saves data to a csv file, works perfectly fine on my Arduino Uno (I am using the default SPI pins). However, for my project I need to use an ESP8266. Does the library ...
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0 votes
1 answer
278 views
Compressing grayscale image with ESP32-S3-WROOM Freenove
I have a ESP32-S3-WROOM module by Freenove which has a camera and a micro SD card module. I can take a snapshot as a PIXELFORMAT_JPEG photo. However, when I change the pixelformat to "...
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1 vote
1 answer
324 views
I can't connect a microSD card
I can’t connect a microSD card to either the Arduino or the ESP32. It needs to be connected to the ESP32; I just tested it on the Arduino to see if it works at all. Equipment: ESP32 devkit v1, Arduino ...
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2 votes
1 answer
267 views
Recursive listing of SD card files
I'm working on a MP3 player and I want to list all files on the SD card. I have found this code on internet : void displaySdCardContent(FileItem& item, int numTabs) { for (int i = 0; i < ...
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2 votes
1 answer
313 views
Read values from a txt file on an SD card
I'm trying to read a text file (has numeric values) from SD card. The values in the file like this 87 512 255 I need to read 87 in ch1 and 512 in ch2 and 255 in ch3. Why did I get on 'SKIP_NONE' '...
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