How to pass the #define for MySensors

[Ricardo JL Rufino]

I need to use the same technique in my library but is not working.
I am using in my config.h

#ifdef ODEV_API_KEY
#define ODEV_API_KEY_REAL ODEV_API_KEY
#endif

#ifndef ODEV_API_KEY
#define ODEV_API_KEY_REAL "*"
#endif

const char MQTT_TOPIC[] = ODEV_API_KEY_REAL "/in/ModuleName";

If I put a #error at first condiftion, it really indicates is falling in this first condition, but MQTT_TOPIC is as if he had fallen in second

[hek]

The "trick" we use in the mysensors library is to include code files (cpp) in the MySensors.h header file. A bit ugly but as the Arduino IDE has a very limited build system, it's the only way you can make defines in sketch visible in the code.

[Ricardo JL Rufino]

If I knew it could include cpf in a .h file I had done before ... =]
Thanks for the tip.

[Ricardo JL Rufino]

I have found some alternatives that can be used:
https://electrohobby.ca/forum/showthread.php?tid=214&pid=1281