g6ejd/esp32-8266-file-download

Using HTTP and an HTML interface to download files from an ESP32/ESP8266

ESP32-8266-File-Download

Using HTTP and an HTML interface to download files from an ESP32/ESP8266

1. Download all files to a sketch folder.

2. Edit the Network tab and add in your SSID and PASSWORD, more if you have them.

3. Choose your IP address, currently it is fixed to 192.168.0.150

4. You can edit the logical name 'fileserver' to your requirements then access the device with http://fileserver.local but only if your browser has mDNS support otherwise use http://192.168.0.150/

5. NOTE: the Directory command is not included in this release, this comes later.

6. To test the download place a known file on the SD-Card for trial purposes.

NOTES:

The ESP32 is not reliable when using SD Cards, please ensure you know how to connect the SPI bus to the SD-Card if not using an MH-ET Live ESP32 board and a Wemos SD-Card Shield. Although pull-ups are enabled, you may need to add an external 4k7 pull-up too on the MISO line.

esp32-8266-file-download's Issues

Maximum file size for download

Hello. I plan to store the logs on the sd card and then download them via wifi. I am currently testing your example. I can download a 2MB text file. Downloading a 6MB text file causes the web server to stop working. I need to reboot my device. I created a issue to ask a question. What is the maximum size of a text file that can be downloaded via Wi-Fi and how is it determined? In addition, I could not download files in PNG format at all. Haven't studied the code carefully yet.

Empty file

When I connect to the ESP8266 directly without a router, the page loads, click download, enter the file name, but the file is downloaded empty. The file definitely exists, it is not empty. What could be the reason?

File on SPIFFS empty on file download

void SD_file_download(String filename) {
File download = SPIFFS.open("/" + filename, "w");

Should the above by "'r" rather than "w"? I tried your program, but found the file on the ESP was empty (0 bytes) after doing the download.

I notice, 'download' and 'upload' are confusing terms when dealing with ESPs. Most google searches show up okay (up/down-load). but the ESP as ESP-server or ESP-client is unclear as to context for the most part.

In this case its ESP-server to download to client (client<-svr).

Just thought I'd let you know.

wher is directory?

i program source but i don't have directory menu

Convert to Spiff instead of SD

Hi , I like your solution very much. I was thinking that maybe downloading from the Spiff in ESP is also a function which is possible with your solution. Have you thought of changing your code to support also SPiff ?