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Hello from France,
First of all, thanks to Renzo for all his work.
I have adapted one of Renzo’s examples (Arduino_esp32_SD) to transfer files via FTP between an SD CARD and my PC. When I upload files to the SD CARD, everything works perfectly. However, if I download files from the SD CARD to the PC, the file is created in the destination directory, but it’s empty.
I use the SD / ESP8266WiFi / SimpleFTPServer libraries.
I’ve tried this with several FTP clients and files of different sizes: the target file is always empty.
I should add that I read the file on the SD CARD with this code:File config_SD = SD.open("config.txt","r"); if (!config_SD.available()) { while (config_SD.available()){ Serial.println(config_SD.readStringUntil('\n')); } } config_SD.close();Could you please give me a hint?
Thank you and have a nice day.
Bruno -
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Hi Renzo,
Thanks for the feedback 🙂
Filezilla is well configured: upload to SD CARD works perfectly. It’s the same using WinFTP.
With the same settings, FTP works with another project that uses flash memory storage.The only changes to Arduino_esp32_SD.ino are :
#include <WiFi.h>
becomes
#include <ESP8266WiFi.h>and
SPI.begin(14, 12, 15, 13); //SCK, MISO, MOSI,SS if (SD.begin(13, SPI)) {becomes
#define CS_PIN D8 [...] if (SD.begin(CS_PIN )) { -
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Hi, the
stream.readBytesmust return the number of bytes read, as the documentation specifies, so I think it’s an ESP core temporary bug.
But I check better next.
Thanks for your feedback, RM -
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