Arduino 1.6.6 - DUE: Library compilation issue - error: 'Serial' undeclared

Projects Programming
1

I've tried '#include <Arduino.h>' but to no avail... any other suggestions?

2

Please post a full example of the problem code.

3

// from mylib.c

#include <Arduino.h>
#include <mylib.h>

void cheerios (int milk) {
Serial.write(milk);
}

4

No setup()
No loop()
No Serial.begin()

Is this really a full program ?

5

Please post a full example of the problem code.

// from mylib.c

#include <Arduino.h>
#include <mylib.h>

void cheerios (int milk) {
Serial.write(milk);
}

Do you REALLY consider that a FULL example? Where the f**k is mylib.h? Where is setup()? Where is loop()?

6

// main sketch

#include <Arduino.h>
#include <mylib.h>

void setup()
{
Serial.begin(31250); // No compilation issue here
}

void loop()
{
for (int i1 = 1; i1 < 42; i1++) {
cheerios(i1);
delay(i1);
}
}

// PS, @Paul - no need for vulgarity friend :slight_smile:

7

That is STILL not a full example. It WILL fail to compile for anyone but you. If you want help, post ALL of the code.

8

@Paul - Good point. This should now be a complete example, agreed? (and presumably one that should compile:)

// mylib.h

#ifndef MY_LIB_H
#define MY_LIB_H

#include <Arduino.h>

void cheerios(int milk);

#endif

9

djjb:
// from mylib.c

If it is indeed a C file and not C++, you can't use C++ classes directly.
You can create wrapper functions if it is really necessary.

10

Switched everything to cpp and all works well now.

To all that helped here, thank you.