Questions tagged [sd]
The sd tag has no usage guidance.
22
questions with no upvoted or accepted answers
2
votes
0answers
38 views
Returning to parent directory with the SD library
I have a File variable called dir and i'm building a simple file explorer for my device. Is there a way to get a reference to dir's parent directory?
2
votes
0answers
81 views
SD card doesn't work properly
I have this SD-card module. I have formatted the SD with this tool. My problem is that the Arduino Uno can't initialize the SD. I tried with this script:
// include the SD library:
#include <SPI.h&...
2
votes
0answers
588 views
Error while creating file on sd card
I want to create a file and read it form sd card by arduino. I have used sd card module. I have used this following code. In serial monitor it says "SD card is ready to use." But it can't read or ...
2
votes
0answers
500 views
Arduino Audio Recorder - Speed Correct but Wrong Pitch
I'm working on an audio recorder project on an Adafruit Adalogger with SAMD21 ARM-based processor using the Arduino IDE. The desired sampling frequency is 10 kHz, 12-bit resolution with an analog ...
1
vote
0answers
46 views
Failed to display string on oled (SPI) from SD module
i am working on a project in which data from sd card is displayed on the oled screen both using SPI communication, but it is not displaying anything.
i commented out the sd part and then oled works ...
1
vote
1answer
59 views
SD card with arduino UNO
I am trying to use a micro SD card in order to store data sent from an arduino UNO.
My setup consists of:
Arduino UNO (5V logic), powered directly from USB cable
Digilent Full-sized SD Card Slot
...
1
vote
0answers
574 views
reference to 'File' is ambiguous. Why am I getting this error?
The program is supposed to take photo and store the picture into the SD card with the timestamp.
My Program Code:
#include <SdFat.h>
#include <Adafruit_VC0706.h>
#include <SPI.h>
#...
1
vote
0answers
60 views
Getting wrong value from sd card
I stored "28328630" in sd card but at output i getting wrong value.
on serial "5566" getting this value.
#include "HX711.h"
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#...
1
vote
0answers
100 views
LCD on top of SD datalogger flickers help!
I have a problem with my 16,2 with buttons lcd shield.(LCD Keypad Shield). It is connected on top of an SD dataloger. I came to the conclusion that every time the sd shield logs data and completes the ...
0
votes
0answers
26 views
Can I record us (microseconds) with AnalogBinLogger example in SdFat's library?
I am using the AnalogBinLogger from the SdFat example library. I am using it to record 8 analog channels at 5kHz! which is amazing (thank you SdFat).
Is it possible to include a separate column to ...
0
votes
1answer
41 views
SD seems too slow for SMTP
I have asked this question on the arduino forum as well.
I have used SMTP before using client.print (and client.println) but I am now trying to move as much text as I can from RAM to SD (and so I need ...
0
votes
0answers
32 views
Problem with using SD and Adafruit_SSD1306 libraries at the same time
I am searched over the internet and found out a few similar questions, but non of them were helpfull, so I decided to open a new quetion.
I tried both SD and Adafruit_SSD1306 libraries and they both ...
0
votes
1answer
58 views
Barcode not logged in SD card UART
After trying for a good month.. looking like a Newbie I have not managed to log the result of barcode scanner , using rtc SD module and a waveshare scanner connected via UART to ports 2 and 3 from the ...
0
votes
0answers
48 views
Impossibility to open a file for modification in ESP32
Consider the following code:
#include "SD.h"
#include "Fs.h"
void setup() {
Serial.begin(115200);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
...
0
votes
0answers
89 views
Edit JSON File on SD Card
I am currently Working on a project, where I save values in a JSON File on an SD Card.
The JSON looks something like this:
{ "ID1":{[[starttime, endtime],
[starttime, endtime],
[....
0
votes
2answers
200 views
STM32 and SDFat - Can't create file in directory in SD
I'm using the SdFat.h library on a STM32 and I can successfully create a file in the root directory using SD.open("test.txt", FILE_WRITE); but my code fails to create SD.open("DATA/data_test.txt", ...
0
votes
0answers
84 views
Arduino malfunction tmrpcm while used digitalRead
I am programming Arduino UNO for this functionality:
with use of SD card reader module and SIM900 GSM/GPRS shield I am trying to:
1. Pick up incomming call, play message from SD file and after the ...
0
votes
1answer
204 views
SD card creating “extra” file?
So, maybe I'm too tired to see the obvious issue here, but my SD card script is causing a "blank" file to be created, then a secondary file to be correctly created.
I'm trying to store data logs, and ...
0
votes
0answers
1k views
How to read correctly binary data on sd card from a structure?
I am currently struggling to apply Majenkos solution to read binary data from an sd card. I am writing data as floats from a 3-axis accelerometer via a struct this way:
struct data {
float acc_x;
...
0
votes
0answers
114 views
Realistic to create a local variable as the SD buffer?
My intention is to read a file (of max. 128 KB) from an SD card and store it in (external SRAM). I will use an Arduino Mega which has 8 KB of internal SRAM but even 8 KB is not really much for some ...
-1
votes
1answer
598 views
Attempting to read random string from SD card
I was wondering if anyone knew how to read in a random string from a file named "PhraseList.csv" or "PhraseList.xlsx" (whatever is easier)? There is a list of 10k.
#include <SD.h>
#include <...
-1
votes
1answer
867 views
Problem with SPI comms using NodeMCU v 3, Nano and SD
Recently I bought a NodeMCU 8266 v 3 (Lolin) and it works fine. I set up a Catalex SD card module (with a built-in 5-3.3V regulator) and all was good. Then I set the Lolin with an Arduino Uno and or a ...
