Latest ESPAsyncWebServer conflicts with ESP32 core (3.3.7) #392

dvelaren · 2026-02-16T22:57:21Z

dvelaren
Feb 16, 2026

Hello developers, thanks first for this awesome library.

I'm writing this post to get help or ideas to find out why is my compilation failing. I'm getting the following error with the latest ESPAsyncWebServer with latest ESP32 core (3.3.7):

In file included from C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\WebServer\src/HTTP_Method.h:4,
                 from C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\WebServer\src/WebServer.h:30,
                 from C:\Users\dvelas25\Documents\Arduino\libraries\WiFiManager/WiFiManager.h:94,
                 from C:\Users\dvelas25\OneDrive - Universidad EAFIT\Administración\Coordinación Sistemas Embebidos\Demo IoT\Cultivo Vertical\Arduino\cultivoVerticalMQTTPrettyOTA\cultivoVerticalMQTTPrettyOTA.ino:36:
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:95:6: error: 'HTTP_DELETE' conflicts with a previous declaration
   95 |   XX(0,  DELETE,      DELETE)       \
      |      ^
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
In file included from C:\Users\dvelas25\OneDrive - Universidad EAFIT\Administración\Coordinación Sistemas Embebidos\Demo IoT\Cultivo Vertical\Arduino\cultivoVerticalMQTTPrettyOTA\cultivoVerticalMQTTPrettyOTA.ino:31:
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:90:3: note: previous declaration 'WebRequestMethod HTTP_DELETE'
   90 |   HTTP_DELETE = 0b0000000000000100,
      |   ^~~~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:96:6: error: 'HTTP_GET' conflicts with a previous declaration
   96 |   XX(1,  GET,         GET)          \
      |      ^
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:88:3: note: previous declaration 'WebRequestMethod HTTP_GET'
   88 |   HTTP_GET = 0b0000000000000001,
      |   ^~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:97:6: error: 'HTTP_HEAD' conflicts with a previous declaration
   97 |   XX(2,  HEAD,        HEAD)         \
      |      ^
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:93:3: note: previous declaration 'WebRequestMethod HTTP_HEAD'
   93 |   HTTP_HEAD = 0b0000000000100000,
      |   ^~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:98:6: error: 'HTTP_POST' conflicts with a previous declaration
   98 |   XX(3,  POST,        POST)         \
      |      ^
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:89:3: note: previous declaration 'WebRequestMethod HTTP_POST'
   89 |   HTTP_POST = 0b0000000000000010,
      |   ^~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:99:6: error: 'HTTP_PUT' conflicts with a previous declaration
   99 |   XX(4,  PUT,         PUT)          \
      |      ^
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:91:3: note: previous declaration 'WebRequestMethod HTTP_PUT'
   91 |   HTTP_PUT = 0b0000000000001000,
      |   ^~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:102:6: error: 'HTTP_OPTIONS' conflicts with a previous declaration
  102 |   XX(6,  OPTIONS,     OPTIONS)      \
      |      ^
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:94:3: note: previous declaration 'WebRequestMethod HTTP_OPTIONS'
   94 |   HTTP_OPTIONS = 0b0000000001000000,
      |   ^~~~~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:105:6: error: 'HTTP_COPY' conflicts with a previous declaration
  105 |   XX(8,  COPY,        COPY)         \
      |      ^
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:101:3: note: previous declaration 'WebRequestMethod HTTP_COPY'
  101 |   HTTP_COPY = 0b0010000000000000,
      |   ^~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:106:6: error: 'HTTP_LOCK' conflicts with a previous declaration
  106 |   XX(9,  LOCK,        LOCK)         \
      |      ^
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:96:3: note: previous declaration 'WebRequestMethod HTTP_LOCK'
   96 |   HTTP_LOCK = 0b0000000100000000,
      |   ^~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:107:6: error: 'HTTP_MKCOL' conflicts with a previous declaration
  107 |   XX(10, MKCOL,       MKCOL)        \
      |      ^~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:99:3: note: previous declaration 'WebRequestMethod HTTP_MKCOL'
   99 |   HTTP_MKCOL = 0b0000100000000000,
      |   ^~~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:108:6: error: 'HTTP_MOVE' conflicts with a previous declaration
  108 |   XX(11, MOVE,        MOVE)         \
      |      ^~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:100:3: note: previous declaration 'WebRequestMethod HTTP_MOVE'
  100 |   HTTP_MOVE = 0b0001000000000000,
      |   ^~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:109:6: error: 'HTTP_PROPFIND' conflicts with a previous declaration
  109 |   XX(12, PROPFIND,    PROPFIND)     \
      |      ^~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:95:3: note: previous declaration 'WebRequestMethod HTTP_PROPFIND'
   95 |   HTTP_PROPFIND = 0b0000000010000000,
      |   ^~~~~~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:110:6: error: 'HTTP_PROPPATCH' conflicts with a previous declaration
  110 |   XX(13, PROPPATCH,   PROPPATCH)    \
      |      ^~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:98:3: note: previous declaration 'WebRequestMethod HTTP_PROPPATCH'
   98 |   HTTP_PROPPATCH = 0b0000010000000000,
      |   ^~~~~~~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:112:6: error: 'HTTP_UNLOCK' conflicts with a previous declaration
  112 |   XX(15, UNLOCK,      UNLOCK)       \
      |      ^~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:97:3: note: previous declaration 'WebRequestMethod HTTP_UNLOCK'
   97 |   HTTP_UNLOCK = 0b0000001000000000,
      |   ^~~~~~~~~~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:128:6: error: 'HTTP_PATCH' conflicts with a previous declaration
  128 |   XX(28, PATCH,       PATCH)        \
      |      ^~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:138:45: note: in definition of macro 'XX'
  138 | #define XX(num, name, string) HTTP_##name = num,
      |                                             ^~~
C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\tools\esp32-libs\3.3.7/include/http_parser/http_parser.h:139:3: note: in expansion of macro 'HTTP_METHOD_MAP'
  139 |   HTTP_METHOD_MAP(XX)
      |   ^~~~~~~~~~~~~~~
C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:92:3: note: previous declaration 'WebRequestMethod HTTP_PATCH'
   92 |   HTTP_PATCH = 0b0000000000010000,
      |   ^~~~~~~~~~
 
Se encontraron varias bibliotecas para "PrettyOTA.h"
  Usado: C:\Users\dvelas25\Documents\Arduino\libraries\PrettyOTA
  No utilizado: C:\Users\dvelas25\Documents\Arduino\libraries\PrettyOTA-0.3.8
Se encontraron varias bibliotecas para "WiFi.h"
  Usado: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\WiFi
  No utilizado: C:\Users\dvelas25\Documents\Arduino\libraries\WiFiNINA
 
Usando librería Async TCP con versión 3.4.10 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\Async_TCP 
Usando librería DHT sensor library con versión 1.4.6 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\DHT_sensor_library 
Usando librería ESP Async WebServer con versión 3.10.0 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer 
Usando librería FS con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\FS 
Usando librería ESPmDNS con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\ESPmDNS 
Usando librería PrettyOTA con versión 1.1.3 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\PrettyOTA 
 
Usando librería ArduinoJson con versión 7.4.2 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\ArduinoJson 
Usando librería ArduinoOTA con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\ArduinoOTA 
Usando librería Networking con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\Network 
Usando librería Update con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\Update 
Usando librería PubSubClient con versión 2.8 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\PubSubClient 
Usando librería WebSerialLite con versión 2.3.0 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\WebSerialLite 
Usando librería WiFi con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\WiFi 
Usando librería WiFiManager con versión 2.0.17 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\WiFiManager 
Usando librería WebServer con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\WebServer 
Usando librería DNSServer con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\DNSServer 
Usando librería ESP32 Async UDP con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\AsyncUDP 
Usando librería movingAvg con versión 2.3.2 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\movingAvg 
Usando librería Adafruit Unified Sensor con versión 1.1.15 en la carpeta: C:\Users\dvelas25\Documents\Arduino\libraries\Adafruit_Unified_Sensor 
Usando librería Hash con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\Hash 
Usando librería HTTPClient con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\HTTPClient 
Usando librería NetworkClientSecure con versión 3.3.7 en la carpeta: C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\NetworkClientSecure 
 
Error during build: exit status 1
 
 
Used library            Version Path
Async TCP               3.4.10  C:\Users\dvelas25\Documents\Arduino\libraries\Async_TCP
DHT sensor library      1.4.6   C:\Users\dvelas25\Documents\Arduino\libraries\DHT_sensor_library
ESP Async WebServer     3.10.0  C:\Users\dvelas25\Documents\Arduino\libraries\ESP_Async_WebServer
FS                      3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\FS
ESPmDNS                 3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\ESPmDNS
PrettyOTA               1.1.3   C:\Users\dvelas25\Documents\Arduino\libraries\PrettyOTA
ArduinoJson             7.4.2   C:\Users\dvelas25\Documents\Arduino\libraries\ArduinoJson
ArduinoOTA              3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\ArduinoOTA
Networking              3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\Network
Update                  3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\Update
PubSubClient            2.8     C:\Users\dvelas25\Documents\Arduino\libraries\PubSubClient
WebSerialLite           2.3.0   C:\Users\dvelas25\Documents\Arduino\libraries\WebSerialLite
WiFi                    3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\WiFi
WiFiManager             2.0.17  C:\Users\dvelas25\Documents\Arduino\libraries\WiFiManager
WebServer               3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\WebServer
DNSServer               3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\DNSServer
ESP32 Async UDP         3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\AsyncUDP
movingAvg               2.3.2   C:\Users\dvelas25\Documents\Arduino\libraries\movingAvg
Adafruit Unified Sensor 1.1.15  C:\Users\dvelas25\Documents\Arduino\libraries\Adafruit_Unified_Sensor
Hash                    3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\Hash
HTTPClient              3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\HTTPClient
NetworkClientSecure     3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7\libraries\NetworkClientSecure
 
Used platform Version Path
esp32:esp32   3.3.7   C:\Users\dvelas25\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.7
 
Command failed with code 1.

dvelaren · 2026-02-16T23:34:17Z

dvelaren
Feb 16, 2026
Author

I have found out the error, the problem was related with the order of the libraries... My .ino file had the libraries in this order:

#include <AsyncTCP.h>
#include <DHT.h>
#include <ESPAsyncWebServer.h> // <--- This creates the conflict
#include <ESPmDNS.h>
#include <PrettyOTA.h>
#include <PubSubClient.h>
#include <WebSerialLite.h>
#include <WiFiManager.h>      // <--- Because this includes the standard WebServer

So what I have done was putting first the WiFiManager before any other include as shown below:

#include <WiFiManager.h>
#include <AsyncTCP.h>
#include <DHT.h>
#include <ESPAsyncWebServer.h>
#include <ESPmDNS.h>
#include <PrettyOTA.h>
#include <PubSubClient.h>
#include <WebSerialLite.h>
#include <WiFiUdp.h>
#include <movingAvg.h>

And problem solved 🎉

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Latest ESPAsyncWebServer conflicts with ESP32 core (3.3.7) #392

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Latest ESPAsyncWebServer conflicts with ESP32 core (3.3.7) #392

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dvelaren Feb 16, 2026

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dvelaren Feb 16, 2026 Author

dvelaren
Feb 16, 2026

dvelaren
Feb 16, 2026
Author