Hello John,

The multiple libraries message means that you might have installed the libraries in your computer globally under Computer > Documents > Arduino and also have installed the same library in your Arduino IDE folder.

You can ignore that warning message. The real problem is that you have the AsyncTCP library missing.

Can you install this library? https://github.com/me-no-dev/AsyncTCP

• Or use this direct link to download the library: https://github.com/me-no-dev/AsyncTCP/archive/master.zip

I hope that helps.

Regards,

Rui

Hello Rui,
Thank you for the quick reply.
I have re-downloaded the library and now still get the following error:
C:\Users\User A3U-1\Documents\Arduino\libraries\ESPAsyncTCP\src\SyncClient.cpp:25:24: fatal error: interrupts.h: No such file or directory
Multiple libraries were found for “WiFi.h”
compilation terminated.
Used: C:\Users\User A3U-1\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi
Not used: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.42.0_x86__mdqgnx93n4wtt\libraries\WiFi
Not used: C:\Users\User A3U-1\Documents\Arduino\libraries\WiFiNINA
Multiple libraries were found for “Adafruit_Sensor.h”
Used: C:\Users\User A3U-1\Documents\Arduino\libraries\Adafruit_Sensor-master
Not used: C:\Users\User A3U-1\Documents\Arduino\libraries\Adafruit_Unified_Sensor-1.1.4
exit status 1
Error compiling for board DOIT ESP32 DEVKIT V1.

Hi Rui,
Just tried again.
This error now:
C:\Users\User A3U-1\Documents\Arduino\libraries\ESPAsyncTCP\src\SyncClient.cpp:25:24: fatal error: interrupts.h: No such file or directory
Multiple libraries were found for “Adafruit_Sensor.h”
compilation terminated.
Used: C:\Users\User A3U-1\Documents\Arduino\libraries\Adafruit_Sensor-master
Not used: C:\Users\User A3U-1\Documents\Arduino\libraries\Adafruit_Unified_Sensor-1.1.4
Multiple libraries were found for “WiFi.h”
Used: C:\Users\User A3U-1\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi
Not used: C:\Users\User A3U-1\Documents\Arduino\libraries\WiFiNINA
Not used: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.42.0_x86__mdqgnx93n4wtt\libraries\WiFi
exit status 1
Error compiling for board DOIT ESP32 DEVKIT V1.

Can you also try to install this library? It shouldn’t be necessary, but it looks like it’s requesting a file from the ESPAsyncTCP library: https://github.com/me-no-dev/ESPAsyncTCP

• Download the library here: https://github.com/me-no-dev/ESPAsyncTCP/archive/master.zip

The error says:

C:\Users\User A3U-1\Documents\Arduino\libraries\ESPAsyncTCP\src\SyncClient.cpp:25:24: fatal error: interrupts.h: No such file or directory

So, it looks like it’s missing the interrupts.h file from ESPAsyncTCP library.

Hi Rui,
I have downloaded the ESPAsyncTCP via github and re-named the master ESPAsyncTCP when I saved it to the Arduino library.  I am still getting the same error.
C:\Users\User A3U-1\Documents\Arduino\libraries\ESPAsyncTCP\src\SyncClient.cpp:25:24: fatal error: interrupts.h: No such file or directory
Multiple libraries were found for “Adafruit_Sensor.h”
compilation terminated.
Used: C:\Users\User A3U-1\Documents\Arduino\libraries\Adafruit_Sensor-master
Not used: C:\Users\User A3U-1\Documents\Arduino\libraries\Adafruit_Unified_Sensor-1.1.4
Multiple libraries were found for “WiFi.h”
Used: C:\Users\User A3U-1\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi
Not used: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.42.0_x86__mdqgnx93n4wtt\libraries\WiFi
Not used: C:\Users\User A3U-1\Documents\Arduino\libraries\WiFiNINA
exit status 1
Error compiling for board DOIT ESP32 DEVKIT V1.

Unfortunately I don’t know exactly why that’s happening, installing those libraries should have fixed your issue.

• Can you compile/upload a blank sketch to your ESP32?

I would recommend removing all previous libraries that are causing these issues. Can you delete all the folders and re-install the libraries required for the project?

• Go to: C:\Users\User A3U-1\Documents\Arduino\libraries\
• Remove: Adafruit_Sensor-master, Adafruit_Unified_Sensor-1.1.4, ESPAsyncTCP, AsyncTCP, ESPAsyncWebServer and any extra library that is required and it’s causing those error messages

Then, re-download the libraries and install them using the Arduino IDE. In Arduino IDE, go to the top menu “Sketch” > “Include library” > “Add .zip library”

Hi Rui,
Unfortunately I’m still having problems.  I have deleted and reinstalled all libraries you suggested, but the same errors is occurring.  Still trouble with the ESPAsyncTCP.
The BME680 example test code compiles perfectly well and the results are displayed on the serial monitor.
Multiple libraries were found for “WiFi.h”
Used: C:\Users\User A3U-1\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi
Not used: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.42.0_x86__mdqgnx93n4wtt\libraries\WiFi
In file included from C:\Users\User A3U-1\Documents\Arduino\Weather_Station_WindSpeed\weather_station_wifi02a_oct14a\weather_station_wifi02a_oct14a.ino:13:0:
C:\Users\User A3U-1\Documents\Arduino\libraries\ESPAsyncWebServer\src/ESPAsyncWebServer.h:33:22: fatal error: AsyncTCP.h: No such file or directory
compilation terminated.
exit status 1
Error compiling for board DOIT ESP32 DEVKIT V1.

Did you re-install the AsyncTCP library this time? Because it’s back to this error:

1\Documents\Arduino\libraries\ESPAsyncWebServer\src/ESPAsyncWebServer.h:33:22: fatal error: AsyncTCP.h: No such file or directory

Which means that the AsyncTCP library is missing…
I apologize for the back and forth, but Arduino IDE is so messy with libraries that it’s very hard to understand where’s the culprit…

Hi Rui,
The problem goes on.  Still won’t compile:
C:\Users\User A3U-1\Documents\Arduino\libraries\ESPAsyncTCP\src\SyncClient.cpp:25:24: fatal error: interrupts.h: No such file or directory
Multiple libraries were found for “WiFi.h”
compilation terminated.
Used: C:\Users\User A3U-1\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi
Not used: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.42.0_x86__mdqgnx93n4wtt\libraries\WiFi
Multiple libraries were found for “Adafruit_Sensor.h”
Used: C:\Users\User A3U-1\Documents\Arduino\libraries\Adafruit_Sensor-master
Not used: C:\Users\User A3U-1\Documents\Arduino\libraries\Adafruit_Unified_Sensor-1.1.4
exit status 1
Error compiling for board DOIT ESP32 DEVKIT V1.
Don’t know where interrupts.h library is?
Confused, John.

Good Evening Rui,
I’m pleased to let you know that all is now well.  I seem to have made some errors in the way I was saving the libraries to the Arduino IDE.  I got a clue from the latest blog you sent out this evening.  I finished up with far too many included libraries in the script.  By deleting most of them the problem was solved. This has been a great learning curve.
Just a question. Is there a better IDE to use than the Arduino IDE?
Thank you for your patience and help.
Regards,
John

Check out PlatformIO.

Thank you Steve.  Will check it out.

Hello John, I definitely recommend using VS Code and PlatformIO IDE as Steve suggested. We wrote an in-depth guide on that topic:

• Getting Started with VS Code and PlatformIO IDE for ESP32 and ESP8266 (Windows, Mac OS X, Linux Ubuntu)

I think if you’re just getting started, it’s easier to use Arduino IDE, but after you make your first projects you can definitely upgrade to VS Code

Hi Rui, 
Thanks for that, I will get into that Tutorial. 
I am looking to add two more pieces of code into the bme680 Web server. One for the 1733 Adafruit Anemometer and one for the ds18b20 temp sensor. I have started to try to understand the JS for the Web page layout in order to add two more cards. Is there a tutorial on this?
Thanks for all your help. John. 

Hello John, at the moment we don’t have any eBook or course on HTML… But we are working on it, it’s almost ready and it should be published in 2-4 weeks.

I recommend using the w3schools website:

• w3schools.com/html/default.asp

Which cover a bit of HTML, but to add more cards you’ll always have to duplicate the HTML section with each element using a unique ID and send the readings in the loop() section.

We don’t have any Anemometer guides right now, but we also received one this month, so we’ll be working on a new guide in the next couple of weeks.

That’s brilliant Rui. I have added two extra cards for wind speed and soil temperature and I now  just need to sort out the readings etc. I have the 1733 anemometer working with an Arduino Mega2560 and also the ds18b20 sensor with the same.
Looking forward to the new tutorials. 
John. 

I’ve bought that exact same anenometer, but I haven’t had time to try it, but I’ll definitely post a guide for the ESP32 using it. The code that runs in the Arduino should be very similar for the ESP, but I haven’t tried anything.
Regards,
Rui

Great. Look forward to it.