Compile error for ESP32 C3- based boards

[jnule1a]

During compilation for ESP32 C3-based boards (ESP32C3, Adafruit QT Py ESP32-C3, M5Stack Stamp C3) , the following error is displayed: C:\Users\toto\Documents\Arduino\libraries\ESPAsyncWebServer-master\src\AsyncWebSocket.cpp: In member function 'IPAddress AsyncWebSocketClient::remoteIP()': C:\Users\toto\Documents\Arduino\libraries\ESPAsyncWebServer-master\src\AsyncWebSocket.cpp:832:28: error: call of overloaded 'IPAddress(unsigned int)' is ambiguous return IPAddress(0U); ^ In file included from C:\Users\toto\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.3\cores\esp32/Arduino.h:163, from C:\Users\toto\Documents\Arduino\libraries\ESPAsyncWebServer-master\src\AsyncWebSocket.cpp:21: C:\Users\toto\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.3\cores\esp32/IPAddress.h:51:5: note: candidate: 'IPAddress::IPAddress(const uint8_t*)' IPAddress(const uint8_t *address); ^~~~~~~~~ C:\Users\toto\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.3\cores\esp32/IPAddress.h:50:5: note: candidate: 'IPAddress::IPAddress(uint32_t)' IPAddress(uint32_t address); ^~~~~~~~~ C:\Users\toto\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.3\cores\esp32/IPAddress.h:29:7: note: candidate: 'constexpr IPAddress::IPAddress(const IPAddress&)' class IPAddress: public Printable ^~~~~~~~~ Multiple libraries were found for "WiFi.h" Used: C:\Users\toto\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.3\libraries\WiFi Not used: C:\Program Files (x86)\Arduino\libraries\WiFi

Test conditions:

• Arduino IDE 1.8.19
• ESP32 board manager 2.0.3, M5Stack board manager 2.0.3
• If board is non C3 e.g. ESP32 Dev module, compilation is ok
• sketch: #include <Arduino.h> #include <WiFi.h> #include <AsyncTCP.h> #include <ESPAsyncWebServer.h>

const char* ssid = "nhatoi"; const char* password = "wifi-1nhatoi";

AsyncWebServer server(80);

void setup(void) { }

void loop(void) { }

[HugoML]

I got the same error that relates to ESP32-C3 only.

/Users/user/Documents/Arduino/libraries/ESPAsyncWebServer/src/AsyncWebSocket.cpp: In member function 'IPAddress AsyncWebSocketClient::remoteIP()': /Users/user/Documents/Arduino/libraries/ESPAsyncWebServer/src/AsyncWebSocket.cpp:832:28: error: call of overloaded 'IPAddress(unsigned int)' is ambiguous return IPAddress(0U); ^ In file included from /Users/user/Library/Arduino15/packages/esp32/hardware/esp32/2.0.3/cores/esp32/Arduino.h:163, from /Users/user/Documents/Arduino/libraries/ESPAsyncWebServer/src/AsyncWebSocket.cpp:21: /Users/user/Library/Arduino15/packages/esp32/hardware/esp32/2.0.3/cores/esp32/IPAddress.h:51:5: note: candidate: 'IPAddress::IPAddress(const uint8_t*)' IPAddress(const uint8_t *address); ^~~~~~~~~ /Users/user/Library/Arduino15/packages/esp32/hardware/esp32/2.0.3/cores/esp32/IPAddress.h:50:5: note: candidate: 'IPAddress::IPAddress(uint32_t)' IPAddress(uint32_t address); ^~~~~~~~~ /Users/user/Library/Arduino15/packages/esp32/hardware/esp32/2.0.3/cores/esp32/IPAddress.h:29:7: note: candidate: 'constexpr IPAddress::IPAddress(const IPAddress&)' class IPAddress: public Printable ^~~~~~~~~ Multiple libraries were found for "WiFi.h" Used: /Users/user/Library/Arduino15/packages/esp32/hardware/esp32/2.0.3/libraries/WiFi Not used: /Applications/Arduino.app/Contents/Java/libraries/WiFi Using library WiFi at version 2.0.0 in folder: /Users/user/Library/Arduino15/packages/esp32/hardware/esp32/2.0.3/libraries/WiFi

Using library AsyncTCP at version 1.1.1 in folder: /Users/user/Documents/Arduino/libraries/AsyncTCP Using library ESPAsyncWebServer at version 1.2.3 in folder: /Users/user/Documents/Arduino/libraries/ESPAsyncWebServer exit status 1 Error compiling for board ESP32C3 Dev Module.

[jnule1a]

At last, I found the following work around: edit libraries\ESPAsyncWebServer-master\src\AsyncWebSocket.cpp to replace “return IPAddress(0U)” by “return IPAddress(0ul)” or “return IPAddress((uin32_t) 0u)”

[HugoML]

@jnule1a You rock! I am not using WebSockets and changed the line as you said to return IPAddress ((uint32_t) OU), and the compiler took it. :) Thanks so much!

[Zimbu98]

Typo in jnule1a's very helpful answer: return IPAddress((uin32_t) 0u) should be return IPAddress((uint32_t) 0u)

Notice the little t added

Thanks jnule1a!

[homonto]

it looks like this library is not maintained anymore ;-( I have the same error but thanks to you guys I solved it ;-)

[RohanJoydhar]

i was working on Esp32-c3 module from speed studio. with esp_dash getting same error. after editing libraries\ESPAsyncWebServer-master\src\AsyncWebSocket.cpp to replace “return IPAddress(0U)” by “return IPAddress((uint32_t) 0u)” i finnaly got my IP with error, it is a weather station project cunnently trying ant10 sensor module, my code:

#include <WiFi.h> #include <ESPAsyncWebServer.h> #include <ESPDash.h> #include <Ticker.h> #include <Adafruit_AHTX0.h>

Adafruit_AHTX0 aht; const char* ssid = "ESP32"; // Enter SSID here

Ticker periodicTicker; AsyncWebServer server(80); ESPDash dashboard(&server);

Card card1(&dashboard, TEMPERATURE_CARD, "Temperature", "°C"); Card card2(&dashboard, HUMIDITY_CARD, "Humidity", "%");

void updateCards() { sensors_event_t humidity, temp; aht.getEvent(&humidity, &temp); float t = temp.temperature; float h = humidity.relative_humidity; card1.update(t); card2.update(h); dashboard.sendUpdates(); }

void setup() { Serial.begin(115200); aht.begin(); WiFi.softAP(ssid); server.begin(); delay(100); Serial.print("IP address: "); Serial.println(WiFi.softAPIP()); periodicTicker.attach_ms(5000, updateCards); }

void loop() {} thnakyou @jnule1a @HugoML

[pyalot]

pump

[chezlog]

I had to use return IPAddress((uint32_t) 0K)

[adojang]

At last, I found the following work around: edit libraries\ESPAsyncWebServer-master\src\AsyncWebSocket.cpp to replace “return IPAddress(0U)” by “return IPAddress(0ul)” or “return IPAddress((uin32_t) 0u)”

This fixed it for me.

[FranzKropp]

Great! The Answer from jnule1a was also the solution for me!

[tahunus]

Since that line (832) is meant to return a 0.0.0.0 IP Address if no client is present (I think) besides @jnule1a solution, a IPAddress(0,0,0,0) also works.

[RomanAlexandroff]

@jnule1a, your solution worked like a charm! Thanks a lot! =)

[bag103]

Good afternoon . I have modified the AsyncWebSocket.ccp library by replacing return IP Address((uin t 32_t) 0u); and continues with the error in any program that refers to <ESPAsyncWebServer.h> any more ideas?? Thank you so much

[chezlog]

You might try the suggestion from tahunus - just use IP Address(0,0,0,0)

On Fri, Dec 29, 2023, 9:22 AM Ramon @.***> wrote:

Good afternoon . I have modified the AsyncWebSocket.ccp library by replacing return IP Address((uin t 32_t) 0u); and continues with the error in any program that refers to <ESPAsyncWebServer.h> any more ideas?? Thank you so much

— Reply to this email directly, view it on GitHub https://github.com/me-no-dev/ESPAsyncWebServer/issues/1164#issuecomment-1872200477, or unsubscribe https://github.com/notifications/unsubscribe-auth/A6RMKBESC66WWDWWHL3OEELYL3U57AVCNFSM5XJX5HFKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TCOBXGIZDAMBUG43Q . You are receiving this because you commented.Message ID: @.***>

[bag103]

Good morning. Thank you for your help in my case the solution was

//return IPAddress(0U); original return IPAddress((uint32_t)0); -------------------OK------------------- //return IPAddress((uin t 32_t) 0u); //return IPAddress(0,0,0,0);