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64 questions
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I'm working on a project to read data over CAN, display it on LCD and log data to SD card. LCD is on HSPI and SD card on VSPI. CAN and LCD code is working on core 1 and SD on core 0, there's no wifi. ...
JvJ's user avatar
  • 21
2 votes
0 answers
343 views

I have a toucscreen tft connected to an ESP8266 the aim for which is to take a screeenshot (.bmp format) and upload to Google Drive. I have been following this tutorial. Where I am stuck in how to ...
tstdenis's user avatar
  • 31
4 votes
2 answers
1k views

I'm trying to use a SD card with my ESP32 in order to save some variables in a txt file. Each variable uses 1 byte, so they can be represented by an 8 bit extended ASCII character. The issue is it ...
AlexSp3's user avatar
  • 203
0 votes
1 answer
758 views

I am logging binary data to my SD. I log a datetime object of type 'tm', which is 36 bytes on ESP32. When I create a datetime of type 'tm' on linux it is 56 bytes. ESP32 write tm to SD: [tm datetime = ...
washichi's user avatar
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2 votes
1 answer
421 views

I have an arduino code with an SD card where I save some data. When I load a new code, The SD must update with the new data that I put in the code, but if I reset the Arduino by the reset button, I ...
AlexSp3's user avatar
  • 203
0 votes
1 answer
91 views

Doing some research about SD card adapters, I found these boards with a chip on them. They are actually very common. They have a linear voltage regulator because UNO for example use 5V but SD card ...
Espada86's user avatar
  • 57
1 vote
0 answers
331 views

I have an Arduino Zero processor (atsamd21g18a) with a microSD shield connected (check images of schematics) The point is that I cant make it to work, not with sd.h sketch and not with sdfat.h sketch....
Espada86's user avatar
  • 57
3 votes
3 answers
16k views

I am using a micro sd card shield with an arduino zero, and I am not sure I am using a proper circuit with it. This is the circuit I am using right now: That is all it is there, just a capacitor for ...
Espada86's user avatar
  • 57
2 votes
0 answers
184 views

Im trying to run Timestamps.ino (an example sketch) from the sdfat.h lib into a mkrzero arduino. This is the code I am running: /* * This program tests the dateTimeCallback() function * and the ...
Espada86's user avatar
  • 57
1 vote
0 answers
131 views

I am trying to optimize the memory usage of my ESP8266 arduino sketch by using 8.3 SFN folder names internally, but LFN when needed for user output. Unfortunately when opening a folder by using the ...
Nitek's user avatar
  • 123
10 votes
1 answer
2k views

The current code is used to gather the state of 12 infrared beams and log them to an SD card using the real time clock to mark the time. The code uses a switch to turn the device on and off and an LED ...
JClark's user avatar
  • 103
2 votes
1 answer
232 views

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?
none none's user avatar
  • 233
1 vote
0 answers
194 views

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 ...
Microk's user avatar
  • 115
3 votes
4 answers
6k views

In a simplified example, I have a microcontroller functioning as a data acquisition device - sensor data is received over UART, and then saved to an SD card. This received data is in the form of a 12 ...
nuggetbram's user avatar
  • 151
1 vote
1 answer
86 views

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 ...
elscan's user avatar
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