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.

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69 views

SD Card and Lora module arduino uno

Background: When working on the 2 modules separately they were working perfectly. Problem: In the code attached we tried integrating them but Lora wouldn't receive any data unless we commented out ...
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OLED (I2C) and Micro SD card module not working together in Arduino

I am trying to write some data to SD card and read it back to serial monitor as well as display it to the OLED. Both the sd card and oled work separately but they seem to be interfering with each ...
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Arduino SD Card open file modes append / overwrite

Running Arduine IDE SD DataLogger Example, my data gets appended to a txt file. File dataFile = SD.open("datalog.txt", FILE_WRITE); if (dataFile) { dataFile.println(dataString); dataFile.close(); ...
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I want to save the value of the scanned barcode on an SD Card (in a text file may do)

serial monitor output #include <usbhid.h> #include <usbhub.h> #include <hiduniversal.h> #include <hidboot.h> #include <Wire.h> #include <SPI.h> #include <SD.h&...
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Extra `eecfbba=.@aa` file in sd card

I am doing a project, and I need an SD card. Everything worked well, but after a while when I read the SD card from my PC(Windows 10 64 bit, Intel Core), I found a file called eecfbba=.@aa. It's so ...
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How to import data from SDcard on Arduino to the computer using Arduino serial/COM port?

I have Arduino UNO with Adaruit wifi shield. I store some data on the sd card successfully and now I need to import that data on to the computer. I am sending some token, say "1", to the UART port of ...
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710 views

Using Arduino wireless SD Shield to save data to sd card and send to PC over wireless network

I'm using an Arduino Mega to monitor the current & voltage input to four different sensors. This works fine - the sensors work as expected and I can view the results via the Serial Monitor or ...
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38 views

Arduino not writing full NMEA sentence to SD-card file

I'm currently building a small GPS-box that's supposed to track my location and write the full NMEA sentence to an sd card. (I want to pars it afterwards at my pc) I'm using the Arduino Nano and the ...
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102 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 ...
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4k views

SD card fail of initializing

I have an Arduino Mega and a catalex card reader which yesterday worked, but today I tried another time and the sd card where not detected, I am using the example code from Arduino website for the ...
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Adalogger FeatherWing & 32u4 Bluefruit Datalogger - Unable to Datalog to SD-card from Wallwart

Working on a Adalogger FeatherWing, 32u4 Bluefruit, and analog light sensor datalogger project. Would like to datalog to the SD card when using only the wallwart. Am able to log data to the SD card ...
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Is it possible to print to a Google Sheets document from an Arduino and ESP8266?

So I'm looking to use an ESP8266 with an Arduino Uno to print something to a Google Sheets document. I would be printing the time and date from a real-time clock module, the id of a fingerprint ...
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788 views

Arduino SD count files and open last, How to?

I am trying to count files. I have one hidden file from Windows10 so i am doing "-1" but I want to open the last file and can't work out how, any help? Please, Thanks #include <SD.h> int ...
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Is there some hardware that can be used to upload sketch source code via USB flash disk (Automatically By plugging it in)

Well am asking this basically to know if it is possible to create a bootable flash drive that automatically uploads any source code onto the arduino just like creating a bootable flash drive when ...
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SD-Card-Module doesnt work with external power supply

Problem description I am trying to build a datalogger with an Arduino UNO. I have connected a SD card module to the Arduino. I have planned to catch the measurement data from the analog input pins. ...
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264 views

cannot show free space of SD card with arduino nano

I'm using a nano v3, the SD module and a 64GB microSD card. Writing to the card works fine. But I can't print out the free space left on the card. I'm using this code: /* SD card read/write ...
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Simple webpage serve with Arduino ethernet shield on SD card

I have been experiment with the arduino uno board from few days but can't seem to make it serve web page stored in SD card of ethernet shield. If I print the contents of the file to serial it works ...
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30 views

Overflow while working with SD library

i am currently working on a Project with an SD card. I want to open a .csv-file on my sd card (later it should be the last file) and then read the ID that is at the start of the .csv-file. Yesterday ...
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222 views

Why does analog sensor “hum” when plugged into common ground?

I have the ground for an SD card module, LED, and piezo sensor all plugged into the same ground rail. When doing this I get a low "hum" in the piezo readings where instead of reading ground voltage (0)...
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363 views

Two SD card interfaces on one ESP8266?

I know it's possible to hook up multiple SPI devices, but how can one access the second drive from a sketch? Looking at the SDWebServer.ino example, my doubt is with the SD.begin(SS); part. If I ...
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102 views

Adafruit Micro-SD breakout not initializing on MEGA 2560

] [I am having quite a bit of trouble trying to get my Arduino MEGA 2560 to read my micro-SD card. My wiring is as follows: Breakout Arduino 5v 5v Gnd Gnd CLK 52 DO ...
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Can I use GSM and Data Logger Shield at the same time on one Arduino?

Me and my classmates are trying to make an arduino base project where we will be using sensors, GSM, and Data logger shield. We want the arduino to store the data collected and at the same time send a ...
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585 views

Writing data from multiple sensors in burst mode to an Arduino Due

I need help developing a simple sketch that can read data simultaneously from 3 analog accelerometers and send it in 'burst mode' to be stored on an SD card, to reduce the effect of latency. I used ...
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Wire SlaveReceiver : will the registered function in onRecieve interrupt/conflict with loop block?

I am currently researching on I2C, and I made a configuration that has MasterWriter that transmits data to a SlaveReceiver that will store the data received from Master, into an SD card, and then ...
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175 views

reading micro SD card directly from PC

Is it possible to read a microSD card (on a breakout) through the USB port on the arduino? or perhaps another USB port I could attach to the breakout? Basically, I would like to read data off the ...
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ESP32 doesnt save every string to SD Card

My code initializes, the header (the ID; Value string) for the .csv file gets saved, but the dataString which is the most important part doesnt save to the .csv file. I get an arraypointer to the ...
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108 views

ESP32 saving data to SD card in .csv doesnt format correctly

i want to save a vector to a .csv file on a SD Card. I watched this tutorial on how to do it and it describes it perfectly even though its kinda dated. My Problem is that everything is saved into ...
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405 views

DFPlayer for Writing to SD Card

Can you use the DFPlayer to write to the SD card? Link for DFPlayer: https://www.dfrobot.com/wiki/index.php/DFPlayer_Mini_SKU:DFR0299 Here's the goal of my project. I have a button that, when pressed,...
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212 views

What pins can be used for chip select (CS, CC) on the Arduino nano every?

I’ve checked the nano’s tech specs but I can’t seem to find any information regarding it. I’ve tried setting it to pin 26 (digital output)
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53 views

SD writing problem

I have an Arduino code for logging sensor data, time and date. Then I store all the data in the SD card and then I will send the sensor value to another node by using Lora. but I can't write the data ...
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4answers
1k views

Use 5V SD-Adapter on 3.3V System

I want to use a Catalex Micro SD Card Adapter in Combination with my Arduino MKR GSM 1400. The problem is, that the Arduino uses 3.3V to operate but the SD Adapter needs 5V (or at least 4.5V) to ...
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94 views

Trouble with reading Bitmaps from SD-Card

I'm having problems with reading a bitmap file with the SD library. I wrote a small header that reads uncompressed 24-bit bitmap files. It works fine when I try it on Windows 10 MingW with fread() ...
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2answers
47 views

Audio stops playing after rtc is connected

I am trying to play a song using arduino while at the same time display time using a rtc board using the tmrpcm library. However, if the rtc board is connected no sound is played. I do understand ...
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45 views

SD card readline reading batched lines?

So, I am trying to transmit float data, over UART, from my Arduino to another machine. The log of this data is really large, so I am forced to put it on an SD card, and read it into the Arduino line-...
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683 views

Want to display an image from SD card to ILI9486 LCD display

I am completely new to Arduino. I have been given a side project to display a image from SD card to display. LCD used is ILI9486 which has a SD card slot at the back of the display module. I have ...
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2answers
949 views

ESP32 cam board and waking from deep sleep

I am getting an error that the sd card cant be mounted when the ESP32 comes out of deep sleep. The board is coded to wake up on a timer from deep sleep and mount the sd card and take a picture. My ...
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42 views

Copy one SD card to another

I want to copy an SD card to another. What is the best way to attack this problem? Should i get two sd card shields? If yes, is it possible to stack two together, or will there be problems with the ...
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What do these pins mean? Where should I plug them in?

I am trying to collect data from the arduino into a SD card for the first time, so I bought the adapter at my local electronics/arduino shop. However, I could not find an explanation as to what each ...
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SD card example freezes at line SD.begin() what should I do?

I have a 16GB SD card which is formated with FAT32. I'm trying to run the example codes presented for SD in Arduino. The SD card is inserted in the data logging shield and the CS pin in this shield is ...
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445 views

EDB. Is it possible to create multiple tables with db.create()?

Good day! I seem to be having trouble creating multiple tables with EDB. I am using Arduino UNO and SD Card module to save my db. Here is my Serial. Here is my table declaration. struct ...
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29 views

Can the following materials be used to power up an attendance based sensor?

arduino uno, esp8266, rfid module rc522, sd card module, real time clock module, buzzer, led light and battery holder. I was planning to build a sensor that monitors attendance with the use of and ...
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296 views

Write an array to SD

I'm new to the Arduino and I asked some questions around here and they were really helpful so I'm hoping I will get help once more #define maxLen 800 volatile unsigned int irBuffer[maxLen]; //...
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242 views

Editing a particular position in a file stored in SD card

I am trying to store some variables in a text file which is saved in a SD card, using the SD library. Every time my program runs, it load the values of those variables from the file. After a few ...
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54 views

Reading from SD and save it in an array

I have a text file with an IR raw code that I need to read from the SD in order to send it and I don't know how to do it. I tried to use the read file function from the specific SD library but it didn'...
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Yun - FileSystem.Open prevents client.println from outputting to web page

The below code is meant to display lines stored in a text file to an arduino based web page (it's a IR gate monitoring solution). When I visit I can execute client.println("hello") and I see the ...
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42 views

SD Card store struct: force big-endian / little-endian?

Following MAJENKO's tutorial on sd card file optimization and data integrity, can I force the SDCard to read and write in either big-endian or little-endian? I need this in order to maintain backup ...
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2answers
554 views

Reading names of files on sd card returning odd file names

When trying to read the file names from an sd card some are being returned with a ~1 and cutting off the full file name. Initializing SD card...initialization done. TEST.TXT 402 UNTITL~1 ...
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Making CS (chip select) work in SPI (for and SD card and OLED)

I'm working on a project that will log data to an SD card and display a user interface on an OLED. The SparkFun OLED breakout was super easy to set up. I was also able to get the SD-Card library ...
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2answers
94 views

Writing to sd card with a sampling rate 50ms or less? I have a sketch that writes to sd every 1s but jams at faster sampling rates. Please help?

My code below reads data from an ADC and 3 digital pins via a Mega and prints to an SD Shield (Deek Robot). I want to be able to read the data every 50ms (20ms ideally). I can't get below 250ms. I've ...
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Combining ADC IRQ with SPI peripherals results in SPI not working

I'm working on a pet project that requires ADC, SD card (SPI interface, SdFat library) and a display in the future (also SPI). I have put together a piece of code that initializes ADC at the highest ...

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