Unable to figure out why 'LittleFS' was not declared in this scope

[the-programmer]

Hi all,

For a project I am trying to use the ESPAsync_WiFiManager but all the examples seem to be getting the same error.
The example I am using is Async_ConfigOnDoubleReset
This generates the following error.
src/main.cpp:87:30: error: 'LittleFS' was not declared in this scope

It does not seem to be the same as issue #95 since I am using 2.0.3 as framework.

The Build log.txt is attached.

Does anyone have any suggestions on how to fix this?

[khoih-prog]

Check Prerequisites

Notice: This LittleFS_esp32 library has been integrated to Arduino ESP32 core v1.0.6+ and you don't need to install it if using ESP32 core v1.0.6+

As you're using the new ESP32 cores v2.0.3 with built-in LIttleFS, you don't need Lorol's LITTLEFS library anymore. Especially you're using the recent PIO version supporting new ESP32 core v1.0.6+

You can try to comment out the following line in platformio.ini

ESPAsync_WiFiManager/platformio/platformio.ini

Line 45 in 41f6479

lorol/LittleFS_esp32@>=1.0.6

If not OK, try to compile using Arduino IDE to see if there is anything wrong with your installation. Then moving on to PIO.
Post the issue on PIO Forum for help if the problem persists.

Good Luck,

[the-programmer]

Just to let you know, In Arduino the library compiles without issues. However the following library's need to be installed manually. (And that is not super clear).
ESPAsyncWebServer
AsyncTCP

[the-programmer]

Also, a link to the question in the PIO Forum.

[khoih-prog]

From PIO Forum

| |-- ESP_DoubleResetDetector @ 1.3.1
| | |-- LittleFS_esp32 @ 1.0.6

As you're using new ESP32 core v1.0.6+, I think that you have to do something similar to fatal error: vfs_api.h: No such file or directory #11, such as remove all instances of LittleFS_esp32 from platformio.ini and library.json of ESP_DoubleResetDetector library.

[the-programmer]

For reference. I just got all the patches correct to get Async_ConfigOnDoubleReset.ino working.
For .pio\libdeps\esp32dev\ESP_DoubleResetDetector\library.json

27,32d26
<     {
<       "owner": "lorol",
<       "name": "LittleFS_esp32",
<       "version": "^1.0.6",
<       "platforms": ["espressif32"]
<     }

For .pio\libdeps\esp32dev\ESPAsync_WiFiManager\library.json

49,54d48
<     },
<     {
<       "owner": "lorol",
<       "name": "LittleFS_esp32",
<       "version": ">=1.0.6",
<       "platforms": ["espressif32"]

For .pio\libdeps\esp32dev\ESP Async WebServer\src\ESPAsyncWebServer.h

27c27,28
< #include "FS.h"
---
> //#include "FS.h"
> #include <LittleFS.h>

Edit: The .pio\libdeps\esp32dev\LittleFS_esp32 needs to be removed as well.

Hope this helps someone