Wire.h not found!

Question

Here's the code that's making this error:

#include "Wire.h"

Here's the error:

fatal error: Wire.h: No such file or directory
 #include "Wire.h"
                  ^
compilation terminated.
Error compiling.

I also can't include any file from my Arduino\libraries folder. I tried to reinstall the IDE several times in different places and nothing happened. Why is this happening?

EDIT: after some time I discovered that this error occurs in header files only, not in sketches!

Could you clarify a little more on your setup of the IDE and the full paths to those libraries and if you have any duplicates. Also what is the settings you chose in the Boards menu. — RSM, Jun 28 '16 at 07:58
D:\Arduino\hardware\arduino\avr\libraries\Wire\Wire.h And I chose the Arduino Uno COM3 — None, Jun 28 '16 at 08:03
Is the library there header there(I know its an obvious ques). That is where the arduino system should be looking when UNO is chosen — RSM, Jun 28 '16 at 08:08
try hard linking it to the exacr path in the #include macro. Also what version of the IDE are you using? — RSM, Jun 28 '16 at 08:55
Delete your IDE. Delete your preferences.txt file. Download and install 1.6.9 — Majenko, Jun 28 '16 at 15:10

score 4 · Answer 1 · edited Jul 29 '16 at 07:50

4

Use #include <Wire.h>

Including files in double quotes (") will point to headers in current working directory first.

Edit: ... and there is nothing wrong with copying headers to CWD if you are modifying them, but that's probably not what you want.

edited Jul 29 '16 at 07:50

Code Gorilla

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answered Jul 29 '16 at 06:56

user400344

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score 0 · Answer 2 · answered Jul 27 '16 at 18:23

0

First go to your library folder and check whether u included that Wire.h header file or not.If not then first include that file then problem will get solved automatically.

answered Jul 27 '16 at 18:23

Lokesh Chebrolu

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The line that is causing the problem in the include statement, the one you think will fix it. If that's not what you mean please can you clarify your answer? – Code Gorilla Jul 27 '16 at 19:29

score 0 · Answer 3 · edited Oct 28 '23 at 07:09

0

I had a similar issue and found this question. However, the solution for me is different.

I already had #include <Wire.h>, nevertheless the compiler told me it's missing. It turned out, I had selected a wrong board from a previous project. Needed to change to "Arduino Uno".

edited Oct 28 '23 at 07:09

sa_leinad

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answered Oct 27 '23 at 15:26

JeffRSon

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score 0 · Answer 4 · answered Nov 21 '23 at 22:42

I copy here the answer from https://forum.arduino.cc/t/wire-h-no-such-file-or-directory-solved/297761, cause it worked for me:

It's not enough to put "#include <Wire.h>" in the source file you are using the library in. It seems you must also put "#include <Wire.h>" in the main *.ino file for the sketch as well, before it can be used in any other source code files.

Wire.h not found!

4 Answers4