RAK15002 & RAK19007 + RAK4631

loky32 · July 15, 2026, 4:26pm

Hi, I’m trying to build a logger using the RAK15002, RAK19007, and RAK4631, with the Arduino API and the SD library.

The problem I’m having is related to the consistently high power consumption when I initialize the SD module; the current rises to 15–20 mA continuously, not just during read/write operations. I’m not sure what I might be doing wrong, but I wouldn’t expect this level of power consumption while the card isn’t in use.

Do you have any idea what this might be? I started with the example at:

github.com

RAKWireless/WisBlock/blob/master/examples/RAK4630/IO/RAK15002_SD_Card/RAK15002_SD_Card.ino

/**
   @file RAK15002_SD_Card.ino
   @author rakwireless.com
   @brief Read, write, delete SD card file for RAK4631.
   @version 0.1
   @date 2021-3-11
   @copyright Copyright (c) 2021
**/

#include "SPI.h"
#include "SD.h"//http://librarymanager/All#SD

/**
   @brief  This function is used to read data from file. 
*/
void readFile(const char * path)
{
  Serial.printf("Reading file: %s\n", path);
  
  File file = SD.open(path, FILE_READ); // re-open the file for reading.

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Regards,
Julio.

loky32 · July 17, 2026, 9:36pm

I improved the current consumption changing the SD library to greiman/SdFat library that allows you to de-initialize the SD from the SPI.

beegee · July 20, 2026, 1:41am

Thanks for sharing the solution.