ESP32编程新手使用ESPAsyncWebServer编译报错求助

Hey there! Let's work through those compilation errors you're hitting with ESPAsyncWebServer—they're super common when starting out with ESP32, so don't stress. Here's how to fix them step by step:

1. Fix the Missing AsyncTCP.h Error (The Main Problem) #

Your fatal error is caused by a missing dependency: ESPAsyncWebServer requires the AsyncTCP library to handle low-level TCP connections. Here are two ways to install it:

Option 1: Use Arduino Library Manager (Easiest) #

• Open your Arduino IDE
• Navigate to Sketch > Include Library > Manage Libraries
• In the search bar, type AsyncTCP
• Look for the library created by me-no-dev (the same author as ESPAsyncWebServer)
• Click Install to grab the latest version compatible with your ESP32 core

Option 2: Manual Installation #

• Get the source code zip of AsyncTCP (from the official repository maintained by the same author as ESPAsyncWebServer)
• In Arduino IDE, go to Sketch > Include Library > Add .ZIP Library
• Select the downloaded zip file to complete installation

2. Address the Multiple WiFi Libraries Warning #

The Multiple libraries were found for "WiFi.h" message is just a warning (not the cause of your compile failure), but it's good to understand:

• The IDE is already using the correct ESP32-specific WiFi library (C:\Users\User\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi)—this is exactly what you need, since the other library is for standard Arduino boards (like Uno) and won't work with ESP32.
• If you want to eliminate the warning, you can delete the unused WiFi library from C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\WiFi, but this isn't strictly necessary.

3. Quick Post-Install Checks #

After installing AsyncTCP:

• Double-check that you've selected the correct board (ESP32 Wrover Module) in Tools > Board > ESP32 Arduino
• If you still run into issues, try updating your ESP32 core to the latest version via Tools > Board > Boards Manager > ESP32 Arduino > Update—older core versions can sometimes have compatibility issues with newer libraries.

Once you've completed these steps, recompile your sketch—it should run without the missing header error!

内容的提问来源于stack exchange，提问作者yardenK