JSON Library warnings

[ozarchie]

Environment:
System: Mac ARM M2
Arduino: Version: 2.3.8 CLI Version: 1.4.1
Copyright © 2026 Arduino SA

I have an Arduino program that uses your Dashboard, which compiles and works very well.

But .. I have to use //github.com/bblanchon/ArduinoJson.git @ 6.21.5 to get a clean compile.

If I use any of the 7.x.x libraries I get a significant number of warnings like:

/Users/xxxx/LocalProjects/libraries/ArduinoJson/src/ArduinoJson/compatibility.hpp:63:58: note: declared here 63 | class ARDUINOJSON_DEPRECATED("use JsonDocument instead") StaticJsonDocument | ^~~~~~~~~~~~~~~~~~ /Users/xxxx/LocalProjects/libraries/ESP-DashboardPlus/src/ESPDashboardPlus.h: In member function 'void ESPDashboardPlus::updateDropdownCard(const String&, const String&)': /Users/xxxx/LocalProjects/libraries/ESP-DashboardPlus/src/ESPDashboardPlus.h:1804:14: warning: 'template<unsigned int N> class ArduinoJson::V742PB22::StaticJsonDocument' is deprecated: use JsonDocument instead [-Wdeprecated-declarations] 1804 | StaticJsonDocument<256> doc;

Your document suggests that I should use 7.x.x.
These warnings do not appear to affect the compilation and operation of the code.

Should I just ignore them?

[ozarchie]

To rule out any influence my programming may have, I have installed your AccessPoint.ino program and it generates the same warnings.

When I change to V6.21.6, all warnings go away except for this one:
In file included from /Users/xxxx/LocalProjects/AccessPoint/AccessPoint.ino:22: /Users/xxxx/LocalProjects/libraries/ESP-DashboardPlus/src/ESPDashboardPlus.h: In lambda function: /Users/xxxx/LocalProjects/libraries/ESP-DashboardPlus/src/ESPDashboardPlus.h:1428:72: warning: 'AsyncWebServerResponse* AsyncWebServerRequest::beginResponse_P(int, const String&, const uint8_t*, size_t, AwsTemplateProcessor)' is deprecated: Replaced by beginResponse(int code, const String& contentType, const uint8_t* content, size_t len, AwsTemplateProcessor callback = nullptr) [-Wdeprecated-declarations] 1428 | AsyncWebServerResponse* response = request->beginResponse_P( 200, "text/html", _htmlData, _htmlSize); | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from /Users/xxxx/LocalProjects/AccessPoint/AccessPoint.ino:20: /Users/xxxx/LocalProjects/libraries/ESP_Async_WebServer/src/ESPAsyncWebServer.h:562:27: note: declared here 562 | AsyncWebServerResponse *beginResponse_P(int code, const String &contentType, const uint8_t *content, size_t len, AwsTemplateProcessor callback = nullptr) { | ^~~~~~~~~~~~~~~

The AsyncWebServer and AsyncTCP are from ESP32Async.

Here are the libraries it is using from the verification phase:
Using library WiFi at version 3.3.7 in folder: /Users/xxxx/Library/Arduino15/packages/esp32/hardware/esp32/3.3.7/libraries/WiFi Using library Networking at version 3.3.7 in folder: /Users/xxxx/Library/Arduino15/packages/esp32/hardware/esp32/3.3.7/libraries/Network Using library ESP Async WebServer at version 3.10.0 in folder: /Users/xxxx/LocalProjects/libraries/ESP_Async_WebServer Using library FS at version 3.3.7 in folder: /Users/xxxx/Library/Arduino15/packages/esp32/hardware/esp32/3.3.7/libraries/FS Using library Async TCP at version 3.4.10 in folder: /Users/xxxx/LocalProjects/libraries/Async_TCP Using library ArduinoJson at version 6.21.6 in folder: /Users/xxxx/LocalProjects/libraries/ArduinoJson Using library ESP-DashboardPlus at version 1.1.1 in folder: /Users/xxxx/LocalProjects/libraries/ESP-DashboardPlus Using library Update at version 3.3.7 in folder: /Users/xxxx/Library/Arduino15/packages/esp32/hardware/esp32/3.3.7/libraries/Update Using library Hash at version 3.3.7 in folder: /Users/xxxx/Library/Arduino15/packages/esp32/hardware/esp32/3.3.7/libraries/Hash

I am not sure if I should try to correct these.